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Derivatives - Schedule of Derivative Instruments in Statement of Financial Position, Fair Value (Details) - Level 3 - USD ($)
$ in Millions
Jun. 30, 2025
Mar. 31, 2025
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Derivative Assets $ 0 $ 0
Cash Flow Hedging | Designated as Hedging Instrument    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Derivative Assets 25 7
Derivative Liabilities $ 0 $ 2