Basis of Presentation and Accounting Policies (Details) (Textual) (USD $)	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Basis of Presentation and Accounting Policies (Textuals) [Abstract]
Unrecognized tax benefits	$ 48,000,000
Tax benefit as result of the settlement with income tax authority	52,000,000
Valuation Allowance	82,000,000		173,000,000
Valuation Allowance Associated With Investment Realized Capital Losses	86,000,000
Percentage of valuation allowance released associated with investment realized capital losses	100.00%
Deferred tax assets	3,400,000,000
Ordinary Deferred Tax Assets	3,000,000,000
Capital Deferred Tax Assets	356,000,000
Gross deferred tax assets realized capital losses	618,000,000
Gross deferred tax liabilities unrealized capital gains	262,000,000
Charge related to a decrease in deferred tax assets		$ 19,000,000

Basis of Presentation and Accounting Policies.

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Portion of deferred tax assets classified as capital in nature for federal income tax purposes.

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Amount of gross deferred tax assets related to realized capital losses, included in the Company's deferred tax asset.

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Amount of gross deferred tax liabilities related to unrealized capital gains, included in the Company's deferred tax asset.

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- Definition

Increase decrease in deferred tax assets

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Portion of deferred tax assets treated as ordinary for federal income tax purposes.

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Percentage of valuation allowance released associated with investment realized capital losses.

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Tax benefit as result of the settlement with income tax authority.

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The valuation allowance associated with investment realized capital losses.

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- Definition

The aggregate tax effects as of the balance sheet date of all future tax deductions arising from temporary differences between tax basis and generally accepted accounting principles basis recognition of assets, liabilities, revenues and expenses, which can only be deducted for tax purposes when permitted under enacted tax laws; net of deducting the allocated valuation allowance, if any, to reduce such amount to net realizable value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 43

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The sum of the portions of deferred tax assets as of the balance sheet date for which, based on the weight of available evidence, it is more likely than not will not be realized through future reductions of tax-based income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 17
-Subparagraph e

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 43-49

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The gross amount of unrecognized tax benefits (tax reductions recognized in financial reports but excluded from tax returns) pertaining to uncertain tax positions taken in tax returns as of the beginning balance sheet date, excluding amounts pertaining to examined tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 21
-Subparagraph a

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