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Fair Value, Financial Assets and Liabilities Not Measured at Fair Value (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Carrying Amount [Member]
Assets [Abstract]
Other invested assets, primarily mortgage loans	$ 1,006	$ 1,068
Liabilities [Abstract]
Short term debt	121	35
Long term debt	8,982	10,042
Estimated Fair Value [Member]
Assets [Abstract]
Other invested assets, primarily mortgage loans	1,079	1,151
Liabilities [Abstract]
Short term debt	125	36
Long term debt	10,018	11,247
Estimated Fair Value [Member] | Level 2 [Member]
Liabilities [Abstract]
Short term debt		19
Long term debt	9,397	10,482
Estimated Fair Value [Member] | Level 3 [Member]
Assets [Abstract]
Other invested assets, primarily mortgage loans	1,079	1,151
Liabilities [Abstract]
Short term debt	125	17
Long term debt	$ 621	$ 765

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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

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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.

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