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Pension Plans (Benefits Expected to be Paid) (Detail)
¥ in Millions
Mar. 31, 2023
JPY (¥)
Japan  
Defined Benefit Plan Disclosure [Line Items]  
2024 ¥ 5,578
2025 5,698
2026 5,882
2027 5,806
2028 5,668
2029-2033 31,909
Total 60,541
Overseas plans  
Defined Benefit Plan Disclosure [Line Items]  
2024 2,267
2025 2,368
2026 2,341
2027 2,468
2028 2,614
2029-2033 16,148
Total ¥ 28,206