Derivatives and Hedge Accounting - Fair value hedging relationships (Details) - Derivatives designated as hedging instruments - Fair value hedging - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Interest rate contracts
Derivative instruments gain (loss):
Gains/(losses) recognized in earnings on hedging derivatives		$ 86
Gains/(losses) recognized in earnings for excluded components		0
Gain (losses) recognized in earnings on hedged items		(88)
Net Impact		$ (2)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Interest credited to policyholder account balances
Interest rate contracts \| Net Investment Income (Loss)
Derivative instruments gain (loss):
Gains/(losses) recognized in earnings on hedging derivatives	$ 11
Gains/(losses) recognized in earnings for excluded components	0
Gain (losses) recognized in earnings on hedged items	(11)
Net Impact	$ 0
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest credited to policyholder account balances, Net investment income
Interest rate contracts \| Policyholder Account Balance, Interest Expense
Derivative instruments gain (loss):
Gains/(losses) recognized in earnings on hedging derivatives	$ (55)
Gains/(losses) recognized in earnings for excluded components	0
Gain (losses) recognized in earnings on hedged items	54
Net Impact	$ (1)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest credited to policyholder account balances
Foreign exchange contracts
Derivative instruments gain (loss):
Gains/(losses) recognized in earnings on hedging derivatives	$ 177	$ (264)
Gains/(losses) recognized in earnings for excluded components	83	147
Gain (losses) recognized in earnings on hedged items	(177)	264
Net Impact	$ 83	$ 147

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

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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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