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, 2022	Dec. 31, 2021	Dec. 31, 2020
Interest rate contracts \| Interest credited to policyholder account balances
Derivative instruments gain (loss):
Gains/(losses) recognized in earnings on hedging derivatives	$ (81)	$ (19)	$ 14
Gains/(losses) recognized in earnings for excluded components	0	0	0
Gains/(losses) recognized in earnings for hedged items	83	17	(14)
Net Impact	2	(2)	0
Interest rate contracts \| Net investment income
Derivative instruments gain (loss):
Gains/(losses) recognized in earnings on hedging derivatives	11	9	(6)
Gains/(losses) recognized in earnings for excluded components	0	0	0
Gains/(losses) recognized in earnings for hedged items	(12)	(11)	5
Net Impact	(1)	(2)	(1)
Foreign exchange contracts
Derivative instruments gain (loss):
Gains/(losses) recognized in earnings on hedging derivatives	382	210	(422)
Gains/(losses) recognized in earnings for excluded components	244	139	49
Gains/(losses) recognized in earnings for hedged items	(382)	(210)	422
Net Impact	$ 244	$ 139	$ 49

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.

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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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