Notes - Segment Information, Etc.
| Concept | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Notes - Segment information, etc. | ||||||||||||||||
| Segment information | ||||||||||||||||
| Disclosure of sales, profit (loss), asset, liability, and other items for each reportable segment | ||||||||||||||||
| Sales | ||||||||||||||||
| Revenues from external customers | 
                                                24,051,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,097,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,097,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,393,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,956,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,701,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,170,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,373,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,447,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,304,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,170,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,125,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                44,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                507,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                507,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                372,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                133,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -507,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                603,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -603,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                392,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                208,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                603,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |