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Derivatives - Schedule of Derivative Instruments in Statement of Financial Position, Fair Value (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Mar. 31, 2026
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Derivative Liabilities $ 9 $ 10
Level 3    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Derivative Liabilities 0 0
Cash Flow Hedging | Designated as Hedging Instrument | Level 3    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Derivative Assets 0 0
Derivative Liabilities $ 9 $ 10