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Certain Transactions - Business Acquisitions - Summary of Major Classes of Assets and Liabilities Included as Held for Sale (Detail) - USD ($)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Business Combinations [Abstract]    
Inventories $ 7 $ 146
Property, plant and equipment, net and others 32 312
Goodwill 13 27
Adjustments of assets held for sale to fair value (27) (296)
Total assets of the disposal group classified as held for sale in the consolidated balance sheets $ 25 $ 189