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Consolidated Statements Of Comprehensive Income (Loss) (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Consolidated Statements Of Comprehensive Income (Loss) [Abstract]
Unrealized gains (losses), tax	$ 8	$ 36
Reclassification adjustments for (gains) losses, tax	39	11
Other-than-temporary impairment, tax	4	3
Reclassification adjustments for other-than temporary impairments, tax	15	2
Unrealized gains (losses) on derivative instruments, tax	2	4
Reclassification adjustments for (gains) losses included in net income (loss), net of tax	8	1
Foreign currency translation, tax	$ 0	$ 2

X

- Definition

Tax effect on the change in the balance sheet adjustment that results from the process of translating subsidiary financial statements and foreign equity investments into reporting currency of the reporting entity for the period being reported.

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Tax effect on the reclassification adjustment for gains or losses realized upon the sale of securities during the period.

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