Derivative Financial Instruments (Details 6) (Cash Flow Hedges [Member], USD $) In Millions	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Cash Flow Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other comprehensive income (loss), balance at beginning of period	$ (165)	$ 593	$ (59)	$ (76)
Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges	1,630	(40)	1,527	577
Amounts reclassified to net derivatives gains (losses)	17	(1)	9	50
Amounts reclassified to net investment income	1	1	2	3
Amounts reclassified to other expenses	3	0	7	(1)
Other comprehensive income (loss), balance at end of period	$ 1,486	$ 553	$ 1,486	$ 553

Accumulated other comprehensive income (loss) related to the effective portion of derivatives designated in cash flow hedges.

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The current period gain (loss) recognized in other comprehensive income related to the effective portion of derivatives designated in cash flow hedges.

+ Details

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The amount of net gains or losses on a cash flow hedge reclassified in the period to earnings from accumulated other comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 45

-Subparagraph b(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

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-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624171-113959

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 30

-Section 50

-Paragraph 2

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The amount of net gains or losses on a cash flow hedge reclassified in the period to investment income from accumulated other comprehensive income.

+ References

+ Details

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The amount of gains on a cash flow hedge reclassified in the period to other expense from accumulated other comprehensive income.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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