CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 238	$ 150	$ 205	$ 156
Other comprehensive income (loss):
Foreign currency translation adjustments	(43)	(38)	(82)	(21)
Unrealized holding losses on securities	0	0	0	(14)
Reclassification of net unrealized gains on securities to prepaid expense and other assets	0	0	0	(7)
Reclassification from other comprehensive loss to selling, general and administrative expense for amortization of actuarial losses on defined benefit pension plans	3	3	9	2
Total other comprehensive income (loss), before income taxes	(40)	(35)	(73)	(40)
Income tax (provision) benefit related to items of other comprehensive income (loss)	0	(2)	(2)	(4)
Total other comprehensive income (loss)	(40)	(37)	(75)	(44)
Total comprehensive income (loss)	$ 198	$ 113	$ 130	$ 112