Commitments and Contingencies (Details) (USD $) In Millions	1 Months Ended	6 Months Ended
Jun. 30, 2009	Jun. 30, 2011
Commitments and Contingencies (Textuals) [Abstract]
Amount paid in connection with Fair Credit Reporting Act class action lawsuit		$ 84.3
Companys' self insured retention		10
Award payment to the company resulted from the excess insurers arbitration		30.1
Reduced value of insurance recoverable	44.5
Counterclaimed for coverage seeking		approximately $50 plus interest
Fair value of all derivative instruments with credit-risk-related contingent features		552
Collateral posted by insurance operating entities		487
Single Notch Downgrade [Member]
Guarantor Obligations [Line Items]
Additional assets to be posted as collateral		63
Double Notch Downgrade [Member]
Guarantor Obligations [Line Items]
Additional assets to be posted as collateral		$ 91

Award payment to the company resulted from the excess insurers arbitration.

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- Definition

Commitments and Contingencies.

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- Definition

Companys' self insured retention.

+ Details

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- Definition

Counterclaimed for coverage seeking.

+ Details

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- Definition

The amount of cash paid for the settlement of litigation or for other legal issues, as of the reporting date.

+ Details

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- Definition

Reduced value of insurance recoverable.

+ Details

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- Definition

The aggregate fair value of additional assets that would be required to be posted as collateral for derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44D
-Subparagraph c

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- Definition

The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44D
-Subparagraph c

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- Definition

The aggregate fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position at the end of the reporting period. For nonderivative instruments that are designated and qualify as hedging instruments, the fair value amounts are the carrying value of the nonderivative hedging instrument, including the adjustment for the foreign currency transaction gain or loss on that instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44D
-Subparagraph b

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- Definition

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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