Stockholders' Equity - Additional Information (Detail) - USD ($)	12 Months Ended			36 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2017	Jan. 31, 2018	Jun. 30, 2017
Stockholders Equity [Line Items]
Entity Public Float						$ 2,222,192,349
Stock Repurchase Program, Authorized Amount	$ 1,500,000,000			$ 1,500,000,000
Treasury Stock, Shares, Acquired				27,000,000
Treasury Stock, Value, Acquired, Cost Method	200,000,000	$ 390,000,000	$ 394,000,000	$ 1,000,000,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount	100,000,000			$ 100,000,000
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	2,000,000	4,000,000	5,000,000
Less: Pension and post-retirement benefits reclassified to earnings, net of tax of $(2), $(1) and $(6), respectively	(5,000,000)	(4,000,000)	(3,000,000)
Entity Common Stock, Shares Outstanding					80,952,244
Designated as Hedging Instrument | Foreign Exchange Forward [Member]
Stockholders Equity [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	(50,000,000)	14,000,000	34,000,000
Corporate Interest Expense [Member]
Stockholders Equity [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	4,000,000	6,000,000	7,000,000
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	$ 2,000,000	$ 4,000,000	$ 4,000,000