Derivative Instruments - Schedule of Collateral Amounts With Rights to Reclaim or Obligation to Return Cash (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Credit Derivatives [Line Items]
Collateral Posted by Counterparty	$ 7,784	$ 7,039
Collateral Posted to Counterparty	(18)	(91)
AA-
Credit Derivatives [Line Items]
Collateral Posted by Counterparty	2,867	4,006
Collateral Posted to Counterparty	(3)	(2)
A+
Credit Derivatives [Line Items]
Collateral Posted by Counterparty	4,613	2,354
Collateral Posted to Counterparty	(15)	(89)
A
Credit Derivatives [Line Items]
Collateral Posted by Counterparty	64	47
Collateral Posted to Counterparty	0	0
A-
Credit Derivatives [Line Items]
Collateral Posted by Counterparty	240	632
Collateral Posted to Counterparty	$ 0	$ 0

Amount of obligation to return cash collateral under master netting arrangements that have not been offset against derivative assets.

Amount of right to receive cash collateral under master netting arrangements that have not been offset against derivative liabilities.