Recent Accounting Pronouncements (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2010
Retained Earnings [Member]
Cumulative transition adjustment, net of tax, adjusted to beginning retained earnings, consolidated VIEs	$ 319
Cumulative transition adjustment, net of tax, adjusted to beginning retained earnings, deconsolidated VIEs	3
Cumulative transition adjustment, net of deferred taxes, adjusted to accumulated other comprehensive loss	(322)
Accumulated Other Comprehensive Income (Loss) [Member]
Cumulative transition adjustment, net of tax, adjusted to beginning retained earnings, consolidated VIEs	(264)
Cumulative transition adjustment, net of tax, adjusted to beginning retained earnings, deconsolidated VIEs	(85)
Cumulative transition adjustment, net of deferred taxes, adjusted to accumulated other comprehensive loss	$ 349