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Property, Plant and Equipment, Net - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Property Plant And Equipment [Abstract]      
Depreciation charge $ 844,000,000 $ 785,000,000 $ 727,000,000
Tax incentives and capital investment funding 10,000,000 54,000,000 149,000,000
Reduction in depreciation charges due to public funding 59,000,000 53,000,000 42,000,000
Cash proceeds from sale of property, plant and equipment 4,000,000 7,000,000 1,000,000
Impairment of long-lived assets $ 0 $ 3,000,000 $ 0