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Derivative Financial Instruments - Schedule of Change in Fair Value of Derivative Instruments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Derivative
Recognized gains (losses) for derivatives	$ 83	$ (27)	$ (141)	$ 141
Recognized gains (losses) for hedged item	$ 2	$ 0	$ 3	$ 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	Benefits and other changes in policy reserves	Benefits and other changes in policy reserves
Fair Value Hedging
Derivative
Recognized gains (losses) for derivatives	$ 205	$ (56)	$ 147	$ 144
Recognized gains (losses) for hedged item	(3)	0	(13)	0
Derivatives designated as hedging instruments
Derivative
Recognized gains (losses) for derivatives	(2)	0	(3)	0
Recognized gains (losses) for hedged item	2	0	3	0
Derivatives designated as hedging instruments | Fair Value Hedging
Derivative
Recognized gains (losses) for derivatives	3	0	12	0
Recognized gains (losses) for hedged item	(3)	0	(13)	0
Derivatives not designated as hedging instruments
Derivative
Recognized gains (losses) for derivatives	85	(27)	(138)	141
Recognized gains (losses) for hedged item	0	0	0	0
Derivatives not designated as hedging instruments | Fair Value Hedging
Derivative
Recognized gains (losses) for derivatives	202	(56)	135	144
Recognized gains (losses) for hedged item	0	0	0	0
Interest rate swaps, included in Accounts payable and accrued liabilities | Derivatives designated as hedging instruments
Derivative
Recognized gains (losses) for derivatives	0	0	0	0
Recognized gains (losses) for hedged item	0	0	0	0
Interest rate swaps, included in Accounts payable and accrued liabilities | Derivatives designated as hedging instruments | Fair Value Hedging
Derivative
Recognized gains (losses) for derivatives	3	0	12	0
Recognized gains (losses) for hedged item	(3)	0	(13)	0
Interest rate swaps, included in Accounts payable and accrued liabilities | Derivatives not designated as hedging instruments
Derivative
Recognized gains (losses) for derivatives	19	(21)	69	(97)
Recognized gains (losses) for hedged item	0	0	0	0
Interest rate swaps, included in Accounts payable and accrued liabilities | Derivatives not designated as hedging instruments | Fair Value Hedging
Derivative
Recognized gains (losses) for derivatives	0	0	0	0
Recognized gains (losses) for hedged item	0	0	0	0
Foreign currency swaps | Derivatives designated as hedging instruments
Derivative
Recognized gains (losses) for derivatives	(2)	0	(3)	0
Recognized gains (losses) for hedged item	2	0	3	0
Foreign currency swaps | Derivatives designated as hedging instruments | Fair Value Hedging
Derivative
Recognized gains (losses) for derivatives	0	0	0	0
Recognized gains (losses) for hedged item	0	0	0	0
Foreign currency swaps | Derivatives not designated as hedging instruments
Derivative
Recognized gains (losses) for derivatives	(4)	0	(4)	0
Recognized gains (losses) for hedged item	0	0	0	0
Foreign currency swaps | Derivatives not designated as hedging instruments | Fair Value Hedging
Derivative
Recognized gains (losses) for derivatives	0	0	0	0
Recognized gains (losses) for hedged item	0	0	0	0
Equity options | Derivatives not designated as hedging instruments
Derivative
Recognized gains (losses) for derivatives	126	(23)	(108)	227
Recognized gains (losses) for hedged item	0	0	0	0
Equity options | Derivatives not designated as hedging instruments | Fair Value Hedging
Derivative
Recognized gains (losses) for derivatives	0	0	0	0
Recognized gains (losses) for hedged item	0	0	0	0
Futures contracts | Derivatives not designated as hedging instruments
Derivative
Recognized gains (losses) for derivatives	9	5	14	11
Recognized gains (losses) for hedged item	0	0	0	0
Futures contracts | Derivatives not designated as hedging instruments | Fair Value Hedging
Derivative
Recognized gains (losses) for derivatives	0	0	0	0
Recognized gains (losses) for hedged item	0	0	0	0
Other derivative investments | Derivatives not designated as hedging instruments
Derivative
Recognized gains (losses) for derivatives	(8)	2	(11)	5
Recognized gains (losses) for hedged item	0	0	0	0
Other derivative investments | Derivatives not designated as hedging instruments | Fair Value Hedging
Derivative
Recognized gains (losses) for derivatives	0	0	0	0
Recognized gains (losses) for hedged item	0	0	0	0
Other embedded derivatives | Derivatives not designated as hedging instruments
Derivative
Recognized gains (losses) for derivatives	4	0	4	3
Recognized gains (losses) for hedged item	0	0	0	0
Other embedded derivatives | Derivatives not designated as hedging instruments | Fair Value Hedging
Derivative
Recognized gains (losses) for derivatives	0	0	0	0
Recognized gains (losses) for hedged item	0	0	0	0
Indexed annuities/IUL embedded derivatives increase (decrease) | Derivatives not designated as hedging instruments
Derivative
Recognized gains (losses) for derivatives	0	0	0	0
Recognized gains (losses) for hedged item	0	0	0	0
Indexed annuities/IUL embedded derivatives increase (decrease) | Derivatives not designated as hedging instruments | Fair Value Hedging
Derivative
Recognized gains (losses) for derivatives	202	(56)	135	144
Recognized gains (losses) for hedged item	0	0	0	0
Reinsurance related embedded derivatives | Derivatives not designated as hedging instruments
Derivative
Recognized gains (losses) for derivatives	(61)	10	(102)	(8)
Recognized gains (losses) for hedged item	0	0	0	0
Reinsurance related embedded derivatives | Derivatives not designated as hedging instruments | Fair Value Hedging
Derivative
Recognized gains (losses) for derivatives	0	0	0	0
Recognized gains (losses) for hedged item	$ 0	$ 0	$ 0	$ 0

X

- Definition

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

+ References

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-Topic 815
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-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
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+ References

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
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+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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-Paragraph 182
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