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Property, Plant and Equipment - Summary of Property, Plant and Equipment Leased (right- of- use assets) (Detail) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Disclosure of detailed information about property, plant and equipment [line items]    
Right-of-use assets, net carrying amount $ 2,131 $ 2,297
Right-of-use assets, depreciation for the period (377) (742)
Land and buildings [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Right-of-use assets, net carrying amount 1,427 1,505
Right-of-use assets, depreciation for the period (218) (425)
Machinery, equipment and other [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Right-of-use assets, net carrying amount 706 795
Right-of-use assets, depreciation for the period $ (159) $ (318)