Variable Annuity and Insurance Guarantees (Details 3) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Mutual funds
Distribution of separate account balances by asset type for variable annuity contracts providing guaranteed benefits:
Separate account balance	$ 53,212	$ 56,837
Equity
Distribution of separate account balances by asset type for variable annuity contracts providing guaranteed benefits:
Separate account balance	28,939	32,310
Bond
Distribution of separate account balances by asset type for variable annuity contracts providing guaranteed benefits:
Separate account balance	22,372	22,319
Other.:
Distribution of separate account balances by asset type for variable annuity contracts providing guaranteed benefits:
Separate account balance	$ 1,901	$ 2,208

Fair value amount of the specified investment category of assets maintained in separate accounts as of the balance sheet date.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 80

-Section 50

-Paragraph 1

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=6484115&loc=d3e19393-158473

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 03-1

-Paragraph 38

-Subparagraph e

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 60

-Paragraph 53, 54

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 20

-Section 55

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=6588021&loc=d3e7104-158389

Name:	us-gaap_ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentFairValue
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant