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Derivative Instruments and Hedging Activities - Narrative (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2025
Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Estimated amount to be reclassified from AOCI $ 11  
Designated as Hedging Instrument | Interest rate swaps | Cash Flow Hedging    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Aggregate notional amounts 16,100  
Designated as Hedging Instrument | Interest rate swaps | Fair Value Hedging    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Aggregate notional amounts $ 40,800 $ 30,900