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Fair Value Of Financial Instruments (Changes In Fair Value Included In The Company's Consolidated Statements Of Operations) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Fixed-Maturity Securities Held At Fair Value [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gains (losses) on financial instruments at fair value and foreign exchange	$ (1)	$ 213
Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gains (losses) on financial instruments at fair value and foreign exchange	(39)	43
Residential Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gains (losses) on financial instruments at fair value and foreign exchange	18	101
Other Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gains (losses) on financial instruments at fair value and foreign exchange		(40)
Long-Term Debt [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gains (losses) on financial instruments at fair value and foreign exchange	(7)	(367)
Loan Repurchase Commitments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gains (losses) on financial instruments at fair value and foreign exchange		$ 32

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- Definition

Change in the fair value of and realized gains and losses on financial instruments and foreign exchange included in earnings.

+ References

No definition available.

+ Details

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- Details

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