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Short-Term and Long-Term Debt (Repayment Schedule for Next Five Years and Thereafter for Long-Term Debt) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2023	Mar. 31, 2022
Debt Disclosure [Abstract]
2024	¥ 877,260
2025	696,472
2026	572,991
2027	601,434
2028	618,527
Thereafter	1,843,039
Total	¥ 5,209,723	¥ 4,427,046

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Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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