Property, Plant and Equipment - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property Plant And Equipment [Line Items]
Depreciation and amortization expense from operations	$ 158	$ 169	$ 171
Depreciation and amortization	756	675	640
Finance lease and other financing obligations
Property Plant And Equipment [Line Items]
Depreciation and amortization	$ 62	$ 49	$ 47