CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Stock options Common Stock [Member]	Stock Units [Member] Common Stock [Member]
Common stock, shares issued (in shares)		371
Stockholders' Equity Attributable to Parent	$ 3,316	$ 19	$ 0	$ 3,257	$ 40
Net income (loss)	(994)			(994)
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	(10)				(10)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(19)				(19)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	11				11
Stock Issued During Period, Shares, Other						1	2
Stock Issued During Period, Value, Other	12	0	12
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	(8)	$ 0	(8)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	$ 35		35
Common Stock, Dividends, Per Share, Declared	$ 0.2425
Dividends, Cash	$ (90)			(90)
Common stock, shares issued (in shares)		373
Stockholders' Equity Attributable to Parent	2,317	$ 19	17	2,235	46
Net income (loss)	(62)			(62)
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	(6)				(6)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(10)				(10)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(8)				(8)
Stock Issued During Period, Shares, Other						0	1
Stock Issued During Period, Value, Other	6	0	6
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	(1)	$ 0	(1)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	17		17
Dividends, Cash	$ 0			0
Common stock, shares issued (in shares)	374	374
Stockholders' Equity Attributable to Parent	$ 2,253	$ 19	39	2,173	22
Common stock, shares issued (in shares)	374	374
Stockholders' Equity Attributable to Parent	$ 2,614	$ 19	85	2,501	9
Net income (loss)	$ 424			424
Stock Repurchased and Retired During Period, Shares	(2)
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	$ 8				8
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(2)				(2)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(7)				(7)
Stock Repurchased and Retired During Period, Value	55	0	55
Stock Issued During Period, Shares, Other						2	2
Stock Issued During Period, Value, Other	41	0	41
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	(32)	$ 0	(32)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	$ 75		75
Common Stock, Dividends, Per Share, Declared	$ 0.12
Dividends, Cash	$ (46)			(46)
Common stock, shares issued (in shares)		377
Stockholders' Equity Attributable to Parent	2,806	$ 19	118	2,667	2
Net income (loss)	$ 258			258
Stock Repurchased and Retired During Period, Shares	(2)
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	$ 5				5
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	1				1
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	0				0
Stock Repurchased and Retired During Period, Value	55	0	55
Stock Issued During Period, Shares, Other						1	0
Stock Issued During Period, Value, Other	16	0	16
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	0	$ 0	0
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	$ 35		35
Common Stock, Dividends, Per Share, Declared	$ 0.12
Dividends, Cash	$ (46)			(46)
Common stock, shares issued (in shares)	376	376
Stockholders' Equity Attributable to Parent	$ 3,020	$ 19	$ 114	$ 2,879	$ 8