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Derivatives and Hedging Activities - Hedges and Credit Risk (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2025
Dec. 31, 2024
Cash Flow Hedges    
Longest period of time over which the entity hedges exposure to the variability in future cash flows 11 years  
Credit Risk    
Aggregate fair value of derivative contracts in net liability position containing credit contingent provisions $ 91 $ 69
Aggregate fair value of assets posted as collateral 91 68
Aggregate fair value of additional assets required to be posted or needed to settle $ 0 $ 1