Unaudited Interim Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Statement [Abstract]
Gain (loss) from changes in estimates on deferred profit liability amortization	$ 97	$ (14)	$ 98	$ (9)

Amount of amortization expense (reversal of amortization expense) for deferred policy acquisition costs and future profits from insurance contract acquired in business combination, from realized investment gain (loss).

No definition available.

Name:	us-gaap_DeferredPolicyAcquisitionCostsAndPresentValueOfFutureInsuranceProfitsAmortizationExpenseRealizedGainLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration