Reflects the maximum amount of loss due to credit risk that, based on the gross fair value of the financial instrument, the entity would incur if parties to the financial instruments that make up the concentration failed completely to perform according to the terms of the contracts and the collateral or other security, if any, for the amount due proved to be of no value to the entity.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 15A

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13537-108611

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592

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-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13537-108611

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-Publisher FASB

-Name Accounting Standards Codification

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-Section 50

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-Section 50

-Paragraph 18

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- Definition

The amount of the recorded investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, accounts receivable (with terms exceeding one year), notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Receivable

-URI http://asc.fasb.org/extlink&oid=6953735

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- Definition

The amount of any significant purchases of financing receivables during the reporting period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953423-111524

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The amount of any significant sales of financing receivables during the reporting period.

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Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended									12 Months Ended
	Dec. 31, 2011	Dec. 31, 2011 [PerformingFinancingReceivableMember]	Dec. 31, 2010 [PerformingFinancingReceivableMember]	Dec. 31, 2011 [PerformingFinancingReceivableMember] [CommercialRealEstateOtherReceivableMember]	Dec. 31, 2010 [PerformingFinancingReceivableMember] [CommercialRealEstateOtherReceivableMember]	Dec. 31, 2011 [PerformingFinancingReceivableMember] [ResidentialPrimeFinancingReceivableMember]	Dec. 31, 2010 [PerformingFinancingReceivableMember] [ResidentialPrimeFinancingReceivableMember]	Dec. 31, 2011 [NonperformingFinancingReceivableMember]	Dec. 31, 2010 [NonperformingFinancingReceivableMember]	Dec. 31, 2010 [FranceMember]	Dec. 31, 2011 [GermanyMember]	Dec. 31, 2010 [StockholdersEquityTotalMember] [FranceMember]	Dec. 31, 2011 [StockholdersEquityTotalMember] [GermanyMember]
Concentration Risk [Line Items]
Percentage of shareholders' equity												11.70%	13.60%
Fixed maturities issued by the foreign government										$ 846	$ 879
Financing Receivable, Recorded Investment [Line Items]
Financing receivable		80.4	55.6	34.5	26.7	45.9	28.9	0	0
Financing receivable acquired during period	84.5
Financing receivable significant sales	$ 0