CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 23	$ 73	$ (46)	$ 6
Other comprehensive income (loss):
Foreign currency translation adjustments	9	21	(39)	18
Unrealized holding losses on securities	0	0	0	(14)
Reclassification of net unrealized gains on securities to prepaid expense and other assets	0	(7)	0	(7)
Reclassification from other comprehensive loss to selling, general and administrative expense for amortization of actuarial losses on defined benefit pension plans	4	(1)	6	(1)
Total other comprehensive income (loss), before income taxes	13	13	(33)	(4)
Income tax (provision) benefit related to items of other comprehensive income (loss)	(2)	(1)	(2)	(2)
Total other comprehensive income (loss)	11	12	(35)	(6)
Total comprehensive income (loss)	$ 34	$ 85	$ (81)	$ 0