Derivatives and Hedge Accounting - Fair value hedging relationships (Details) - Derivatives designated as hedging instruments - Fair value hedging - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Interest rate contracts \| Net Realized and Unrealized Gains (Losses)
Derivative instruments gain (loss):
Gains/(losses) recognized in earnings on hedging derivatives	$ 0	$ 0	$ 0
Gains/(losses) recognized in earnings for excluded components	0	0	0
Gain (losses) recognized in earnings on hedged items	0	0	0
Net Impact	0	0	0
Interest rate contracts \| Interest credited to policyholder account balances
Derivative instruments gain (loss):
Gains/(losses) recognized in earnings on hedging derivatives	86	(156)	(62)
Gains/(losses) recognized in earnings for excluded components	0	0	18
Gain (losses) recognized in earnings on hedged items	(98)	151	54
Net Impact	(12)	(5)	10
Interest rate contracts \| Net investment income
Derivative instruments gain (loss):
Gains/(losses) recognized in earnings on hedging derivatives	0	11	9
Gains/(losses) recognized in earnings for excluded components	0	0	0
Gain (losses) recognized in earnings on hedged items	1	(12)	(11)
Net Impact	1	(1)	(2)
Foreign exchange contracts
Derivative instruments gain (loss):
Gains/(losses) recognized in earnings on hedging derivatives	(243)	459	260
Gains/(losses) recognized in earnings for excluded components	15	171	31
Gain (losses) recognized in earnings on hedged items	243	(459)	(260)
Net Impact	$ 15	$ 171	$ 31

Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement.

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

+ References

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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.

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Net gain (loss) relating to components of the gain (loss) on the fair value hedging instrument excluded from the assessment of fair value hedge effectiveness. Recognized in earnings.

+ References

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Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period.

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