v3.25.2
Segment Information - Additional Information (Detail) - JPY (¥)
¥ in Millions
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Disclosure of operating segments [line items]      
Non-current assets ¥ 56,522,674 ¥ 55,400,017  
Total assets 93,601,350 90,114,296 ¥ 74,303,180
North america [member]      
Disclosure of operating segments [line items]      
Revenues from external customers 16,981,710 15,784,361 12,211,120
Non-current assets 7,242,318 6,679,478 5,793,572
Total assets 33,423,938 31,886,959 26,024,734
Unallocated amounts [Member]      
Disclosure of operating segments [line items]      
Total assets ¥ 15,643,613 ¥ 15,790,074 ¥ 11,101,175