Insurance Liabilities - Funding Agreements (Details) $ in Millions	Dec. 31, 2023 USD ($)
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Gross Amounts	$ 5,625
2024	146
2025-2026	401
2027-2028	4,557
Thereafter	521
FHLB Dallas, DNU Auction
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Gross Amounts	3,357
2024	52
2025-2026	254
2027-2028	3,051
Thereafter	$ 0
FHLB Dallas, DNU Auction \| Minimum
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Stated interest rates (as a percent)	0.22%
FHLB Dallas, DNU Auction \| Maximum
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Stated interest rates (as a percent)	0.30%
FHLB of Dallas
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Gross Amounts	$ 2,027
2024	0
2025-2026	0
2027-2028	1,506
Thereafter	$ 521
FHLB of Dallas \| Minimum
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Stated interest rates (as a percent)	3.53%
FHLB of Dallas \| Maximum
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Stated interest rates (as a percent)	4.77%
FHLB of New York
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Gross Amounts	$ 241
2024	94
2025-2026	147
2027-2028	0
Thereafter	$ 0
FHLB of New York \| Minimum
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Stated interest rates (as a percent)	1.52%
FHLB of New York \| Maximum
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Stated interest rates (as a percent)	2.70%

Federal Home Loan Bank, Advance, Maturity, After Year Three

No definition available.

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- Definition

Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

+ References

+ Details

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- Definition

Discloses the single interest rate [if] applicable to the advances from the Federal Home Loan Bank, by branch, as of the Balance Sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 470
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
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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.

+ References

No definition available.

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- Definition

Amount of advance from Federal Home Loan Bank (FHLBank) maturing in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
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-Section 45
-Paragraph 1
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- Definition

Amount of advance from Federal Home Loan Bank (FHLBank) maturing in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Amount of advance from Federal Home Loan Bank (FHLBank) maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

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-Paragraph 1
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