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Derivatives - Gross and Net Fair Value of Outstanding Derivatives (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Derivative assets    
Gross balance $ 393 $ 296
Balance subject to netting (18) (15)
Net balance 375 281
Derivative liabilities    
Gross balance (238) (271)
Balance subject to netting 18 15
Net balance $ (220) $ (256)