Stockholders' Equity (Components Of Other Comprehensive Income) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Equity [Abstract]
Net loss	$ (158)	$ (91)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Currency translation adjustments (net of tax of $(4), and $(6) respectively)	(83)	1
Net unrealized gain (loss) on cash flow hedges (net of tax of $6 and $3 respectively)	(18)	(8)
Minimum pension liability adjustment (net of tax of $0 and $0, respectively)	2	2
Other comprehensive income (loss)	(99)	(5)
Total comprehensive income (loss)	(257)	(96)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	0	(1)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	(4)	(6)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	6	3
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax	0	0
Corporate Interest Expense [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax		2
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax		1
Selling, General and Administrative Expenses [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax	2	2
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax	$ 1	$ 1