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Fair Value, Financial Assets and Liabilities Not Measured at Fair Value (Details) - USD ($) $ in Millions | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Carrying Amount [Member] |  |  |
Assets [Abstract] |  |  |
Other invested assets, primarily mortgage loans | $ 1,043 |  | $ 1,068
Liabilities [Abstract] |  |  |
Short term debt | 140 | [1] | 35
Long term debt | 8,990 | [1] | 10,042
Estimated Fair Value [Member] |  |  |
Assets [Abstract] |  |  |
Other invested assets, primarily mortgage loans | 1,107 |  | 1,151
Liabilities [Abstract] |  |  |
Short term debt | 144 | [1] | 36
Long term debt | 9,826 | [1] | 11,247
Estimated Fair Value [Member] | Level 2 [Member] |  |  |
Liabilities [Abstract] |  |  |
Short term debt |  |  | 19
Long term debt | 9,204 | [1] | 10,482
Estimated Fair Value [Member] | Level 3 [Member] |  |  |
Assets [Abstract] |  |  |
Other invested assets, primarily mortgage loans | 1,107 |  | 1,151
Liabilities [Abstract] |  |  |
Short term debt | 144 | [1] | 17
Long term debt | $ 622 | [1] | $ 765
[1] | As of March 31, 2021, Short and Long term debt exclude amounts classified as held for sale. See Note 2 for further discussion.

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- References No definition available. + Details
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- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2196772 + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount of short-term debt existing as of the balance sheet date. + References No definition available. + Details
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