v3.26.1
Property, Plant and Equipment - Changes in Property, Plant and Equipment (Detail) - JPY (¥)
¥ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Disclosure of detailed information about property, plant and equipment [line items]      
Carrying amount, beginning balance ¥ 1,319,002 ¥ 1,347,093  
Additions 243,110 166,833  
Acquisition of subsidiaries and businesses 198  
Disposals (19,672) (18,844)  
Depreciation (139,165) (138,873)  
Impairment losses (3,815) (5,461) ¥ (4,168)
Exchange differences 14,609 (2,402)  
Others (43,697) (29,344)  
Carrying amount, ending balance 1,370,570 1,319,002 1,347,093
Gross carrying amount [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Carrying amount, beginning balance 2,443,949 2,459,810  
Carrying amount, ending balance 2,555,017 2,443,949 2,459,810
Accumulated depreciation, amortisation and impairment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Carrying amount, beginning balance (1,124,947) (1,112,717)  
Carrying amount, ending balance (1,184,447) (1,124,947) (1,112,717)
Land [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Carrying amount, beginning balance 468,319 475,296  
Additions 10,002 1,856  
Acquisition of subsidiaries and businesses  
Disposals (8,970) (8,037)  
Depreciation  
Impairment losses (769) (506)  
Exchange differences 454 (612)  
Others 942 322  
Carrying amount, ending balance 469,978 468,319 475,296
Land [member] | Gross carrying amount [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Carrying amount, beginning balance 475,388 484,383  
Carrying amount, ending balance 476,702 475,388 484,383
Land [member] | Accumulated depreciation, amortisation and impairment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Carrying amount, beginning balance (7,069) (9,087)  
Carrying amount, ending balance (6,724) (7,069) (9,087)
Buildings [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Carrying amount, beginning balance 335,181 335,180  
Additions 35,244 25,813  
Acquisition of subsidiaries and businesses 1  
Disposals (1,637) (3,435)  
Depreciation (22,975) (23,023)  
Impairment losses (2,470) (3,277)  
Exchange differences 1,534 (275)  
Others 8,686 4,198  
Carrying amount, ending balance 353,564 335,181 335,180
Buildings [member] | Gross carrying amount [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Carrying amount, beginning balance 833,636 831,805  
Carrying amount, ending balance 864,899 833,636 831,805
Buildings [member] | Accumulated depreciation, amortisation and impairment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Carrying amount, beginning balance (498,455) (496,625)  
Carrying amount, ending balance (511,335) (498,455) (496,625)
Right of use assets [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Carrying amount, beginning balance 366,569 397,746  
Additions 68,807 64,596  
Acquisition of subsidiaries and businesses  
Disposals (6,800) (4,097)  
Depreciation (86,766) (87,449)  
Impairment losses (92)  
Exchange differences 7,191 (1,536)  
Others 2,612 (2,599)  
Carrying amount, ending balance 351,613 366,569 397,746
Right of use assets [member] | Gross carrying amount [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Carrying amount, beginning balance 639,685 663,825  
Carrying amount, ending balance 667,204 639,685 663,825
Right of use assets [member] | Accumulated depreciation, amortisation and impairment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Carrying amount, beginning balance (273,116) (266,079)  
Carrying amount, ending balance (315,591) (273,116) (266,079)
Other tangible assets [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Carrying amount, beginning balance 148,933 138,871  
Additions 74,568  
Acquisition of subsidiaries and businesses 197  
Disposals (2,265) (3,275)  
Depreciation (29,424) (28,401)  
Impairment losses (576) (1,586)  
Exchange differences 5,430 21  
Others (55,937) (31,265)  
Carrying amount, ending balance 195,415 148,933 138,871
Other tangible assets [member] | Gross carrying amount [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Carrying amount, beginning balance 495,240 479,797  
Carrying amount, ending balance 546,212 495,240 479,797
Other tangible assets [member] | Accumulated depreciation, amortisation and impairment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Carrying amount, beginning balance (346,307) (340,926)  
Carrying amount, ending balance ¥ (350,797) ¥ (346,307) ¥ (340,926)