v3.25.2
Financial Instruments - Schedule of Reconciliation of Liabilities Arising from Financing Activities (Details) - JPY (¥)
¥ in Millions
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Beginning balance ¥ 5,368,024 ¥ 4,820,649  
Cash flows from financing activities      
Net increase (decrease) in short-term loans and commercial papers 27,490 277,000 ¥ 40,000
Proceeds from long-term loans 90,000 100,000  
Repayments of long-term loans (587,246) (100,351)  
Proceeds from bonds 934,460    
Repayments of bonds (733,844) (220,550)  
Proceeds from the settlement of cross currency interest rate swaps related to bonds and loans 46,880 60,063 0
Repayments of lease liabilities (45,174) (54,586)  
Interest paid (24,511) (20,826)  
Non-cash items      
Foreign exchange movement (74,744) 455,336  
Change in fair value (19,666) (114,386)  
New, amended and terminated leases 7,752 136,705  
Others 31,016 28,970  
Ending balance 5,020,436 5,368,024 4,820,649
Bonds      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Beginning balance 4,092,879 3,658,314  
Cash flows from financing activities      
Net increase (decrease) in short-term loans and commercial papers (47,000) 277,000  
Proceeds from bonds 934,460    
Repayments of bonds (733,844) (220,550)  
Non-cash items      
Foreign exchange movement (62,248) 369,442  
Others 6,385 8,673  
Ending balance 4,190,632 4,092,879 3,658,314
Long-term loans      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Beginning balance 750,622 723,772  
Cash flows from financing activities      
Proceeds from long-term loans 90,000 100,000  
Repayments of long-term loans (587,246) (100,351)  
Non-cash items      
Foreign exchange movement (3,603) 27,686  
Others 239 (485)  
Ending balance   750,622 723,772
Short-term loans      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Beginning balance 251 256  
Cash flows from financing activities      
Net increase (decrease) in short-term loans and commercial papers 74,490    
Non-cash items      
Foreign exchange movement 0 39  
Others (119) (44)  
Ending balance   251 256
Lease liabilities      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Beginning balance 619,639 479,351  
Cash flows from financing activities      
Repayments of lease liabilities (45,174) (54,586)  
Interest paid (24,511) (20,826)  
Non-cash items      
Foreign exchange movement (8,892) 58,169  
New, amended and terminated leases 7,752 136,705  
Others 24,511 20,826  
Ending balance 573,325 619,639 479,351
Derivative assets used for hedge of debts      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Beginning balance (95,368) (55,223)  
Cash flows from financing activities      
Proceeds from the settlement of cross currency interest rate swaps related to bonds and loans 46,880 60,063  
Non-cash items      
Change in fair value (19,666) (100,207)  
Ending balance (68,154) (95,368) (55,223)
Derivative liabilities used for hedge of debts      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Beginning balance 0 14,179  
Non-cash items      
Change in fair value   (14,179)  
Ending balance ¥ 0 ¥ 0 ¥ 14,179