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Investments (Distribution of Held to Maturity Investments by Contractual Maturity) (Details) (USD $) In Millions | Jun. 30, 2011 | Dec. 31, 2010
--- | --- | ---
Amortized Cost | $ 1 |  |
Fair Value | 1 |  |
Variable Interest Entity, Primary Beneficiary [Member] | Fixed-Maturity Investments [Member] |  |  |
Fair Value | 3,703 |  |
Variable Interest Entity, Primary Beneficiary [Member] | Fixed-Maturity Investments [Member] | Asset-Backed Securities [Member] |  |  |
Investments held-to-maturity, at amortized cost (fair value $3,703 and $3,760) | 3,934 |  |
Fair Value | 3,703 |  |
Variable Interest Entity, Primary Beneficiary [Member] |  |  |
Due after one year through five years, Amortized Cost | 1 | [1] |
Due after one year through five years, Fair Value | 1 | [1] |
Investments held-to-maturity, at amortized cost (fair value $3,703 and $3,760) | 3,934 |  | 4,039
Fair Value | 3,703 |  | 3,760
Amortized Cost | $ 3,934 |  |
[1] | - Relates to tax credit investments reported in "Other investments" on the Company's consolidated balance sheet.

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