Consolidated Statement Of Financial Position
| Concept | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Consolidated statement of financial position | |||||||||||||||||||||||||||||||||||||||
| Statement of financial position | |||||||||||||||||||||||||||||||||||||||
| Assets | |||||||||||||||||||||||||||||||||||||||
| Current assets | |||||||||||||||||||||||||||||||||||||||
| Cash and cash equivalents | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                100,382,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                90,251,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | 
                                                73,846,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | 
| Trade and other receivables | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                221,679,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                215,970,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Inventories | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                290,947,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                262,456,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Other financial assets | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                2,262,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,896,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Other current assets | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                54,492,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                51,368,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Current assets other than assets held for sale | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                669,762,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                622,941,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Assets held for sale | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,778,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Current assets | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                669,762,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                624,719,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Non-current assets | |||||||||||||||||||||||||||||||||||||||
| Property, plant and equipment | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                444,047,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                451,621,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Goodwill | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                29,457,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                29,704,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Intangible assets | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                59,087,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                50,332,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Investments accounted for using equity method | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                4,529,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                4,486,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Other financial assets | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                34,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                33,056,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Deferred tax assets | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                34,687,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                17,357,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Other non-current assets | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                3,176,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,983,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Non-current assets | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                671,361,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                642,013,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Assets | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                1,341,123,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,266,732,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Liabilities and equity | |||||||||||||||||||||||||||||||||||||||
| Liabilities | |||||||||||||||||||||||||||||||||||||||
| Current liabilities | |||||||||||||||||||||||||||||||||||||||
| Trade and other payables | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                186,587,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                175,844,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Bonds and borrowings | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                89,805,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                61,209,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Other financial liabilities | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                14,272,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                16,542,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Income taxes payable | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                6,339,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                17,450,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Provisions | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                7,178,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,235,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Other current liabilities | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                66,434,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                56,271,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Liabilities other than liabilities directly associated with assets held for sale | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                370,615,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                329,551,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Liabilities directly associated with assets held for sale | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,538,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Current liabilities | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                370,615,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                331,089,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Non-current liabilities | |||||||||||||||||||||||||||||||||||||||
| Bonds and borrowings | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                162,637,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                184,166,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Other financial liabilities | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                64,877,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                52,139,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Retirement benefit liability | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                24,578,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                23,027,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Provisions | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                871,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,431,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Deferred tax liabilities | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                19,644,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                12,219,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Other non-current liabilities | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                22,091,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                21,231,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Non-current liabilities | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                294,698,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                294,213,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Liabilities | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                665,313,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                625,302,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Equity | |||||||||||||||||||||||||||||||||||||||
| Equity attributable to owners of parent | |||||||||||||||||||||||||||||||||||||||
| Share capital | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                42,658,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                42,658,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Capital surplus | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                39,788,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                39,702,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Retained earnings | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                520,815,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                522,716,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Treasury shares | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                -26,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -43,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Other components of equity | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                52,899,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                19,081,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Equity attributable to owners of parent | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                656,134,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                624,114,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Non-controlling interests | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                19,676,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                17,316,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Equity | 
                                                42,658,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                520,815,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                43,499,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                52,899,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                656,134,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,676,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                39,788,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -26,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,395,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                675,810,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,081,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                641,430,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,316,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                522,716,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,201,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                624,114,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                42,658,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                39,702,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,784,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -43,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,900,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                563,863,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -61,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                42,658,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                546,200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,663,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                39,705,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -25,144,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -14,481,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                478,379,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,636,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and equity | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                1,341,123,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,266,732,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |