v3.25.2
Property, Plant and Equipment - Additional information (Detail) - Vehicles And Equipment On Operating Leases [Member] - JPY (¥)
¥ in Millions
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Disclosure of detailed information about property, plant and equipment [line items]      
Right of use assets ¥ 4,664,376 ¥ 4,306,566  
Additions to right-of-use assets 2,909,058 2,091,013  
Depreciation of right of use assets 617,495 612,569 ¥ 666,385
Income from subleasing right-of-use assets ¥ 1,008,634 ¥ 947,058 ¥ 992,730