Commitments and Contingencies - Restricted Assets (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Loss Contingencies [Line Items]
Pledged Collateral	$ 1,675	$ 1,663
FHLB restricted stock	56	52
Debt Securities, Trading	8	8
Total restricted assets	2,676	2,568
Fair value of loaned securities	635	565
Securities Pledged under repurchase agreements, carrying value	103	106
Securities Owned and Pledged as Collateral	199	174
Collateral Pledged
Loss Contingencies [Line Items]
Securities pledged	$ 937	$ 845

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