XML 61 R54.htm IDEA: XBRL DOCUMENT v3.25.3
Derivatives - Schedule of Derivative Instruments in Statement of Financial Position, Fair Value (Details) - Level 3 - USD ($)
$ in Millions
Sep. 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 8 7
Derivative Liabilities $ 1 $ 2