Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Jan. 01, 2017
Income Taxes [Line Items]
Unrecognized tax benefits			$ 1
Impact of unrecognized tax benefits if recognized			$ 1
Period of expiration of the statute of limitations for certain jurisdictions	Within the next twelve months
Jurisdictions statutes of limitations expiration period	12 months
ASU 2016-09
Income Taxes [Line Items]
Excess tax benefit from share based compensation	$ 7	$ 11
Minimum
Income Taxes [Line Items]
Foreign and U.S. state and local jurisdictions have statutes of limitations, in years	3 years
Maximum
Income Taxes [Line Items]
Accrued interest and penalties	$ 1
Foreign and U.S. state and local jurisdictions have statutes of limitations, in years	4 years