Fair Value of Financial Instruments - Fair Value Measured on a Recurring Basis Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	$ (4,458)	$ 269
Items Included in Net Income	(1,548)	(776)
Gains (Losses) in OCI and Other	(8)	25
Issuances, Sales, Maturities, Settlements, Calls, Net	72	(453)
Transfers Into or Out of Level 3, Net	(70)	(165)
Ending Fair Value	(6,012)	(1,100)
Corporate bonds \| Fixed maturity AFS securities, at fair value
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	2,497	2,295
Items Included in Net Income	2	1
Gains (Losses) in OCI and Other	(10)	13
Issuances, Sales, Maturities, Settlements, Calls, Net	22	30
Transfers Into or Out of Level 3, Net	(22)	16
Ending Fair Value	2,489	2,355
State and municipal bonds \| Fixed maturity AFS securities, at fair value
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	5	35
Items Included in Net Income	0	0
Gains (Losses) in OCI and Other	0	1
Issuances, Sales, Maturities, Settlements, Calls, Net	0	0
Transfers Into or Out of Level 3, Net	(5)	0
Ending Fair Value	0	36
RMBS \| Fixed maturity AFS securities, at fair value
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	13	1
Items Included in Net Income	0	0
Gains (Losses) in OCI and Other	(1)	0
Issuances, Sales, Maturities, Settlements, Calls, Net	0	0
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	12	1
CMBS \| Fixed maturity AFS securities, at fair value
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	8
Items Included in Net Income	0
Gains (Losses) in OCI and Other	0
Issuances, Sales, Maturities, Settlements, Calls, Net	0
Transfers Into or Out of Level 3, Net	0
Ending Fair Value	8
ABS \| Fixed maturity AFS securities, at fair value
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	1,484	1,117
Items Included in Net Income	0	0
Gains (Losses) in OCI and Other	(1)	8
Issuances, Sales, Maturities, Settlements, Calls, Net	201	168
Transfers Into or Out of Level 3, Net	8	(193)
Ending Fair Value	1,692	1,100
Hybrid and redeemable preferred securities \| Fixed maturity AFS securities, at fair value
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	48	49
Items Included in Net Income	0	0
Gains (Losses) in OCI and Other	3	0
Issuances, Sales, Maturities, Settlements, Calls, Net	0	(2)
Transfers Into or Out of Level 3, Net	0	12
Ending Fair Value	51	59
Trading securities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	284	581
Items Included in Net Income	0	4
Gains (Losses) in OCI and Other	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	(13)	(127)
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	271	458
Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	42	153
Items Included in Net Income	(3)	(16)
Gains (Losses) in OCI and Other	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	0	0
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	39	137
Mortgage loans on real estate
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	288	487
Items Included in Net Income	0	2
Gains (Losses) in OCI and Other	1	3
Issuances, Sales, Maturities, Settlements, Calls, Net	0	(2)
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	289	490
Derivative investments
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	36	2
Items Included in Net Income	12	(1)
Gains (Losses) in OCI and Other	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	4	0
Transfers Into or Out of Level 3, Net	(51)	0
Ending Fair Value	1	1
Ceded MRBs \| Other Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	2	12
Items Included in Net Income	0	(6)
Gains (Losses) in OCI and Other	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	0	0
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	2	6
Ceded MRBs \| Other Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	(239)	(205)
Items Included in Net Income	(121)	(47)
Gains (Losses) in OCI and Other	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	0	0
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	(360)	(252)
Indexed annuity ceded embedded derivatives \| Other Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	940	525
Items Included in Net Income	33	6
Gains (Losses) in OCI and Other	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	0	(226)
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	973	305
RILA, fixed indexed annuity and IUL contracts \| Policyholder Account Balances
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	(9,077)	(4,783)
Items Included in Net Income	(1,677)	(719)
Gains (Losses) in OCI and Other	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	(142)	(294)
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	(10,896)	$ (5,796)
Reinsurance-related embedded derivatives \| Other Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	(789)
Items Included in Net Income	206
Gains (Losses) in OCI and Other	0
Issuances, Sales, Maturities, Settlements, Calls, Net	0
Transfers Into or Out of Level 3, Net	0
Ending Fair Value	$ (583)

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- Definition

Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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- Definition

Amount of gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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- Definition

Amount of purchases, (sales), issuances and (settlements) of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-SubTopic 10
-Topic 820
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-3

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- Definition

Amount of transfers of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset) into (out of) level 3 of the fair value hierarchy.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-3

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- Definition

Fair value of financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-SubTopic 10
-Topic 820
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-3

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