CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net income (loss)	$ (39)	$ 631	$ 1,152
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax of $(30), $20, and $29	76	(123)	(137)
Net change in unrealized gains on available-for-sale securities:
Unrealized gains (losses), net of tax of $(3), $1, and $(2)	8	(1)	5
Reclassification adjustment for losses (gains) included in net income, net of tax effect of $3, $1, and $0	(7)	(2)	(2)
Net unrealized gains (losses) on available-for-sale securities	1	(3)	3
Total other comprehensive income (loss)	77	(126)	(134)
Comprehensive income	$ 38	$ 505	$ 1,018