v3.25.2
Offsetting Financial Assets and Liabilities - Summary of Offsetting Financial Assets and Financial Liabilities (Detail) - JPY (¥)
¥ in Millions
Mar. 31, 2025
Mar. 31, 2024
Other financial assets derivatives [Member]    
Disclosure of other derivatives financial assets and financial liabilities [Line items]    
Gross amounts of recognized financial assets and financial liabilities ¥ 483,378 ¥ 552,921
Financial instruments, Amounts not offset (131,836) (94,647)
Collateral of financial instruments, Amounts not offset (67,495) (130,363)
Net amount 284,046 327,911
Other financial liabilities derivatives [Member]    
Disclosure of other derivatives financial assets and financial liabilities [Line items]    
Gross amounts of recognized financial assets and financial liabilities 319,881 432,189
Financial instruments, Amounts not offset (131,836) (94,647)
Collateral of financial instruments, Amounts not offset (73,689) (52,497)
Net amount ¥ 114,356 ¥ 285,045