Derivative Financial Instruments - Summary of Amounts Recorded in Consolidated Balance Sheet (Detail) $ in Millions	Dec. 31, 2017 USD ($)
Other Current Liabilities
Derivatives Fair Value [Line Items]
Other current liabilities	$ 1	[1],[2]

[1] Includes $1 million and $2 million of foreign exchange derivative contracts in asset and liability positions, respectively.

[2] The fair value of the foreign currency forward exchange contracts is based on dealer quotes of market forward rates and reflects the amount that the Company would receive or pay at their maturity dates for contracts involving the same currencies and maturity dates.