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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 | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2021 | Dec. 31, 2020
Business Combinations [Abstract] |  |
Inventories | $ 7 | $ 146
Property, plant and equipment, net and others | 55 | 312
Goodwill | 9 | 27
Adjustments of assets held for sale to fair value | (42) | (296)
Total assets of the disposal group classified as held for sale in the consolidated balance sheets | $ 29 | $ 189

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