Alternative investments as a percentage of overall invested assets.

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- Definition

Amortized cost of portfolio rated below investment grade.

+ References

No definition available.

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- Definition

This item represents the change in gross unrealized holding gain or loss on available-for-sale securities that has been included in accumulated other comprehensive income, a separate component of shareholders' equity, during the period.

+ References

No definition available.

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- Definition

Percentage of the fair value of portfolio that was rated investment grade as of balance sheet date.

+ References

No definition available.

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- Definition

This item represents the percentage of the fair value of securities obtained as collateral under reverse repurchase agreements

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No definition available.

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- Definition

Fair value of portfolio rated below investment grade.

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No definition available.

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- Definition

This item represents total investment commitments as of the balance sheet date for fixed maturity available-for-sale securities, limited partnerships, real estate and mortgage loans on real estate.

+ References

No definition available.

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- Definition

This item represents investment commitments as of the balance sheet date for limited partnerships.

+ References

No definition available.

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This item represents investment commitments as of the balance sheet date for private placements.

+ References

No definition available.

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- Definition

This item represents investment commitments as of the balance sheet date for mortgage loans.

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No definition available.

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Investments [Line Items]

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No definition available.

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- Definition

Number of partnerships represented in alternative investment portfolio.

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No definition available.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
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- Definition

This item represents disclosure of all significant concentrations of credit risk or market risk arising from the subject financial instrument (as defined), whether from an individual counterparty or groups of counterparties.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Fair value of collateral permitted, by contact or custom, to be sold or re-pledged.

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- Definition

Fair value of the collateral, or portion thereof, that has been re-pledged, delivered, or otherwise used.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 30
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- Definition

Amortized cost of financing receivable modified during period for debtor experiencing financial difficulty.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Investments - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
Investments - Narrative (Details) $ in Millions	Sep. 30, 2024 USD ($) investment	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) investment	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) investment
Investments [Line Items]
Decrease in gross AFS securities unrealized losses			$ 1,500
Percentage of fair value rated as investment grade	96.00%		96.00%		96.00%
Losses from loan modifications	$ 1	$ 1	$ 3	$ 1
Number of partnerships in alternative investment portfolio \| investment	361		361		352
Alternative investments as a percentage of overall invested assets			3.00%		3.00%
Fair value of collateral received that we are permitted to sell or re-pledge	$ 25		$ 25
Fixed maturity available-for-sale securities, at fair value	90,682		90,682		$ 88,738
Investment commitments	5,000		5,000
Investment commitments for limited partnerships	3,200		3,200
Investment commitments for mortgage loans on real estate	1,500		1,500
Investment commitments for private placements	287		287
Asset Pledged as Collateral
Investments [Line Items]
Fixed maturity available-for-sale securities, at fair value	19		19
Derivative Counterparties
Investments [Line Items]
Fair value of collateral received that we are permitted to sell or re-pledge	2,300		2,300
Fair value of securities received as collateral that have been resold or repledged	$ 11		$ 11
Minimum
Investments [Line Items]
Percentage of the fair value of securities obtained as collateral under reverse repurchase agreements	80.00%		80.00%
Maximum
Investments [Line Items]
Percentage of the fair value of securities obtained as collateral under reverse repurchase agreements	95.00%		95.00%
Corporate bonds
Investments [Line Items]
Amortized cost of portfolio rated below investment grade	$ 3,000		$ 3,000		3,000
Fair value of portfolio rated below investment grade	2,900		2,900		2,800
Fannie Mae \| MBS
Investments [Line Items]
Fair value, concentration of risk, investments	854		$ 854		$ 739
Fannie Mae \| Investments \| Lender Concentration Risk \| MBS
Investments [Line Items]
Concentration risk			1.00%		1.00%
Federal Home Loan Mortgage Corporation \| MBS
Investments [Line Items]
Fair value, concentration of risk, investments	573		$ 573		$ 570
Federal Home Loan Mortgage Corporation \| Investments \| Lender Concentration Risk \| MBS
Investments [Line Items]
Concentration risk			1.00%		1.00%
Financial Service \| Securities Investment
Investments [Line Items]
Fair value, concentration of risk, investments	14,000		$ 14,000		$ 14,000
Financial Service \| Investments \| Lender Concentration Risk \| Securities Investment
Investments [Line Items]
Concentration risk			11.00%		11.00%
Consumer Non-Cyclical Industry \| Securities Investment
Investments [Line Items]
Fair value, concentration of risk, investments	$ 13,600		$ 13,600		$ 13,800
Consumer Non-Cyclical Industry \| Investments \| Lender Concentration Risk \| Securities Investment
Investments [Line Items]
Concentration risk			10.00%		11.00%