Deferred Policy Acquisition Costs (Details Textual) (USD $) In Millions, unless otherwise specified			3 Months Ended
Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 Annuity and Supplemental Insurance [Member]
Deferred Policy Acquisition Costs (Textual) [Abstract]
Accumulated amortization of present value of future profits	$ 169	$ 195
Segment Reporting Information [Line Items]
Increase (decrease) in policy acquisition costs			(92)
Increase (decrease) in present value of future profits			$ (16)

The increase (decrease) during the reporting period in the balance sheet value of capitalized sales costs that are associated with acquiring a new insurance customers.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Name:	us-gaap_IncreaseDecreaseInDeferredPolicyAcquisitionCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration