v3.26.1
Financing Liabilities - The Changes in Liabilities Arising from Financing Activities (Detail) - JPY (¥)
¥ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Changes in liabilities arising from financing activities, beginning balance ¥ 11,784,331 ¥ 10,507,712 ¥ 8,046,402
Cash flows from financing activities 995,942 1,413,462 1,493,986
Cash flows from operating activities (33,225) (35,007) (36,665)
Non-cash changes, Acquisitions 82,789 76,919 92,612
Non-cash changes, Changes in foreign currency exchange rates 956,933 (181,812) 949,591
Non-cash changes, Changes in fair value (136,758) 2,532 (32,957)
Non-cash changes, Other 346 525 (5,257)
Changes in liabilities arising from financing activities, ending balance 13,650,358 11,784,331 10,507,712
Short-term financing liabilities [member]      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Changes in liabilities arising from financing activities, beginning balance 1,829,904 1,516,847 1,365,775
Cash flows from financing activities (685,405) 340,693 (24,382)
Cash flows from operating activities
Non-cash changes, Acquisitions
Non-cash changes, Changes in foreign currency exchange rates 90,254 (30,130) 177,888
Non-cash changes, Changes in fair value
Non-cash changes, Other (3,189) 2,494 (2,434)
Changes in liabilities arising from financing activities, ending balance 1,231,564 1,829,904 1,516,847
Long-term financing liabilities [member]      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Changes in liabilities arising from financing activities, beginning balance 9,621,363 8,646,710 6,299,393
Cash flows from financing activities 1,757,609 1,119,418 1,593,898
Cash flows from operating activities
Non-cash changes, Acquisitions
Non-cash changes, Changes in foreign currency exchange rates 860,734 (149,634) 751,082
Non-cash changes, Changes in fair value
Non-cash changes, Other 8,593 4,869 2,337
Changes in liabilities arising from financing activities, ending balance 12,248,299 9,621,363 8,646,710
Lease liabilities [member]      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Changes in liabilities arising from financing activities, beginning balance 322,923 332,406 315,958
Cash flows from financing activities (80,222) (78,137) (80,513)
Cash flows from operating activities
Non-cash changes, Acquisitions 82,789 76,919 92,612
Non-cash changes, Changes in foreign currency exchange rates 6,512 (1,427) 9,509
Non-cash changes, Changes in fair value
Non-cash changes, Other (5,058) (6,838) (5,160)
Changes in liabilities arising from financing activities, ending balance 326,944 322,923 332,406
Derivative financial liabilities (assets) [member]      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Changes in liabilities arising from financing activities, beginning balance [1] 10,141 11,749 65,276
Cash flows from financing activities [1] 3,960 31,488 4,983
Cash flows from operating activities [1] (33,225) (35,007) (36,665)
Non-cash changes, Acquisitions [1]
Non-cash changes, Changes in foreign currency exchange rates [1] (567) (621) 11,112
Non-cash changes, Changes in fair value [1] (136,758) 2,532 (32,957)
Non-cash changes, Other [1]
Changes in liabilities arising from financing activities, ending balance [1] ¥ (156,449) ¥ 10,141 ¥ 11,749
[1] Derivative financial liabilities (assets) are held by the Company and its finance subsidiaries to hedge foreign currency risk for principals and interests payment of long-term financing liabilities. The cash flows related to repayments of principals are included in cash flows from financing activities, while the cash flows related to interest paid are included in cash flows from operating activities.