v3.26.1
Financial Risk Management - Non-derivative Financial Liabilities by Maturity (Detail) - JPY (¥)
¥ in Millions
Mar. 31, 2026
Mar. 31, 2025
Disclosure of maturity analysis for non-derivative financial liabilities [line items]    
Trade payables, carrying amount ¥ 1,781,598 ¥ 1,663,487
Financing liabilities, carrying amount 13,479,863 11,451,267
Accrued expenses, carrying amount 996,653 728,935
Other financial liabilities, carrying amount 458,619 406,670
Non-derivative financial liabilities, carrying amount 16,716,733 14,250,359
Trade payables, contractual cash flows 1,781,598 1,663,487
Financing liabilities, contractual cash flows 14,667,281 12,396,009
Accrued expenses, contractual cash flows 996,653 728,935
Other financial liabilities, contractual cash flows 505,550 447,035
Non-derivative financial liabilities, contractual cash flows 17,951,082 15,235,466
Within 1 year [member]    
Disclosure of maturity analysis for non-derivative financial liabilities [line items]    
Trade payables, contractual cash flows 1,781,598 1,663,487
Financing liabilities, contractual cash flows 5,340,953 4,819,178
Accrued expenses, contractual cash flows 996,653 728,935
Other financial liabilities, contractual cash flows 166,935 115,587
Non-derivative financial liabilities, contractual cash flows 8,286,139 7,327,187
Between 1 and 5 years [member]    
Disclosure of maturity analysis for non-derivative financial liabilities [line items]    
Trade payables, contractual cash flows
Financing liabilities, contractual cash flows 7,782,146 6,331,191
Accrued expenses, contractual cash flows
Other financial liabilities, contractual cash flows 128,809 115,839
Non-derivative financial liabilities, contractual cash flows 7,910,955 6,447,030
Later than 5 years [member]    
Disclosure of maturity analysis for non-derivative financial liabilities [line items]    
Trade payables, contractual cash flows
Financing liabilities, contractual cash flows 1,544,182 1,245,640
Accrued expenses, contractual cash flows
Other financial liabilities, contractual cash flows 209,806 215,609
Non-derivative financial liabilities, contractual cash flows ¥ 1,753,988 ¥ 1,461,249