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Derivative Financial Instruments - Schedule of Change in Fair Value of Derivative Instruments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Derivative [Line Items]
Recognized gains (losses) for derivatives	$ (223)	$ 164
Recognized gains (losses) for hedged item	$ 1	$ 0
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Benefits and other changes in policy reserves	Benefits and other changes in policy reserves
Fair Value Hedging
Derivative [Line Items]
Recognized gains (losses) for derivatives	$ (58)	$ 200
Recognized gains (losses) for hedged item	(10)	0
Derivatives designated as hedging instruments
Derivative [Line Items]
Recognized gains (losses) for derivatives	(1)	0
Recognized gains (losses) for hedged item	1	0
Derivatives designated as hedging instruments | Fair Value Hedging
Derivative [Line Items]
Recognized gains (losses) for derivatives	9	0
Recognized gains (losses) for hedged item	(10)	0
Derivatives not designated as hedging instruments
Derivative [Line Items]
Recognized gains (losses) for derivatives	(222)	164
Recognized gains (losses) for hedged item	0	0
Derivatives not designated as hedging instruments | Fair Value Hedging
Derivative [Line Items]
Recognized gains (losses) for derivatives	(67)	200
Recognized gains (losses) for hedged item	0	0
Interest rate swaps | Derivatives designated as hedging instruments
Derivative [Line Items]
Recognized gains (losses) for derivatives	0	0
Recognized gains (losses) for hedged item	0	0
Interest rate swaps | Derivatives designated as hedging instruments | Fair Value Hedging
Derivative [Line Items]
Recognized gains (losses) for derivatives	9	0
Recognized gains (losses) for hedged item	(10)	0
Interest rate swaps | Derivatives not designated as hedging instruments
Derivative [Line Items]
Recognized gains (losses) for derivatives	52	(80)
Recognized gains (losses) for hedged item	0	0
Interest rate swaps | Derivatives not designated as hedging instruments | Fair Value Hedging
Derivative [Line Items]
Recognized gains (losses) for derivatives	0	0
Recognized gains (losses) for hedged item	0	0
Foreign currency swaps | Derivatives designated as hedging instruments
Derivative [Line Items]
Recognized gains (losses) for derivatives	(1)	0
Recognized gains (losses) for hedged item	1	0
Foreign currency swaps | Derivatives designated as hedging instruments | Fair Value Hedging
Derivative [Line Items]
Recognized gains (losses) for derivatives	0	0
Recognized gains (losses) for hedged item	0	0
Equity options | Derivatives not designated as hedging instruments
Derivative [Line Items]
Recognized gains (losses) for derivatives	(234)	250
Recognized gains (losses) for hedged item	0	0
Equity options | Derivatives not designated as hedging instruments | Fair Value Hedging
Derivative [Line Items]
Recognized gains (losses) for derivatives	0	0
Recognized gains (losses) for hedged item	0	0
Futures contracts | Derivatives not designated as hedging instruments
Derivative [Line Items]
Recognized gains (losses) for derivatives	5	6
Recognized gains (losses) for hedged item	0	0
Futures contracts | Derivatives not designated as hedging instruments | Fair Value Hedging
Derivative [Line Items]
Recognized gains (losses) for derivatives	0	0
Recognized gains (losses) for hedged item	0	0
Other derivative investments | Derivatives not designated as hedging instruments
Derivative [Line Items]
Recognized gains (losses) for derivatives	(4)	3
Recognized gains (losses) for hedged item	0	0
Other derivative investments | Derivatives not designated as hedging instruments | Fair Value Hedging
Derivative [Line Items]
Recognized gains (losses) for derivatives	0	0
Recognized gains (losses) for hedged item	0	0
Other embedded derivatives | Derivatives not designated as hedging instruments
Derivative [Line Items]
Recognized gains (losses) for derivatives	0	3
Recognized gains (losses) for hedged item	0	0
Other embedded derivatives | Derivatives not designated as hedging instruments | Fair Value Hedging
Derivative [Line Items]
Recognized gains (losses) for derivatives	0	0
Recognized gains (losses) for hedged item	0	0
Indexed annuities/IUL embedded derivatives increase (decrease) | Derivatives not designated as hedging instruments
Derivative [Line Items]
Recognized gains (losses) for derivatives	0	0
Recognized gains (losses) for hedged item	0	0
Indexed annuities/IUL embedded derivatives increase (decrease) | Derivatives not designated as hedging instruments | Fair Value Hedging
Derivative [Line Items]
Recognized gains (losses) for derivatives	(67)	200
Recognized gains (losses) for hedged item	0	0
Reinsurance related embedded derivatives | Derivatives not designated as hedging instruments
Derivative [Line Items]
Recognized gains (losses) for derivatives	(41)	(18)
Recognized gains (losses) for hedged item	0	0
Reinsurance related embedded derivatives | Derivatives not designated as hedging instruments | Fair Value Hedging
Derivative [Line Items]
Recognized gains (losses) for derivatives	0	0
Recognized gains (losses) for hedged item	$ 0	$ 0

X

- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A

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- Definition

Indicates line item in statement of income or comprehensive income that includes gain (loss) from derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A

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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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
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-Publisher FASB
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Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period.

+ References

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