Notes - Goodwill And Intangible Assets
| Concept | As at 2025-02-28 | As at 2024-08-31 | As at 2023-08-31 | As at 2022-08-31 | 
|---|---|---|---|---|
| Notes - Goodwill and intangible assets | ||||
| Components of goodwill and intangible assets | ||||
| Acquisition cost | ||||
| Goodwill | — | 
                                                16,201,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,118,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,990,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Software | — | 
                                                694,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                601,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                581,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | 
                                                1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated amortization and impairment | ||||
| Goodwill | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Software | — | 
                                                -484,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -415,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -337,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Carrying amount | ||||
| Goodwill | 
                                                16,296,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,201,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,118,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,990,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Software | — | 
                                                209,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                185,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                243,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | 
                                                1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |