Derivatives and Hedge Accounting - Fair value hedging relationships (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Interest credited to policyholder account balances
Derivative instruments gain (loss):
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest credited to policyholder account balances	Interest credited to policyholder account balances	Interest credited to policyholder account balances
Net Investment Income
Derivative instruments gain (loss):
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Net Investment Income	Net Investment Income	Net Investment Income
Derivatives designated as hedging instruments \| Fair value hedging \| Interest rate contracts
Derivative instruments gain (loss):
Gains/(losses) recognized in earnings on hedging derivatives	$ 79
Gains/(losses) recognized in earnings for excluded components	0
Gains/(losses) recognized in earnings for hedged items	(99)
Net Impact	(20)
Derivatives designated as hedging instruments \| Fair value hedging \| Interest rate contracts \| Interest credited to policyholder account balances
Derivative instruments gain (loss):
Gains/(losses) recognized in earnings on hedging derivatives		$ (81)	$ (19)
Gains/(losses) recognized in earnings for excluded components		0
Gains/(losses) recognized in earnings for hedged items		83	17
Net Impact		2	(2)
Derivatives designated as hedging instruments \| Fair value hedging \| Interest rate contracts \| Net investment income
Derivative instruments gain (loss):
Gains/(losses) recognized in earnings on hedging derivatives			9
Gains/(losses) recognized in earnings for hedged items			(11)
Net Impact			(2)
Derivatives designated as hedging instruments \| Fair value hedging \| Interest rate contracts \| Net Investment Income
Derivative instruments gain (loss):
Gains/(losses) recognized in earnings on hedging derivatives		11
Gains/(losses) recognized in earnings for excluded components		0
Gains/(losses) recognized in earnings for hedged items		(12)
Net Impact		(1)
Derivatives designated as hedging instruments \| Fair value hedging \| Foreign exchange contracts
Derivative instruments gain (loss):
Gains/(losses) recognized in earnings on hedging derivatives	(422)	382	210
Gains/(losses) recognized in earnings for excluded components	(11)	244	139
Gains/(losses) recognized in earnings for hedged items	422	(382)	(210)
Net Impact	$ (11)	$ 244	$ 139

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

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+ References

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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.

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

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