Property and Equipment, Net - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Accounts Payable, Other, Current	$ 418	$ 472	$ 346
Other Liabilities, Noncurrent	757	767
Depreciation and amortization expense	204	191	197
Amortization expense relating to capitalized computer software	109	92	95
Software and Software Development Costs [Member]
Property, Plant and Equipment [Line Items]
Accounts Payable, Other, Current	16	$ 15	$ 16
Other Liabilities, Noncurrent	$ 12