v3.26.1
Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income by Component (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Beginning balance $ 6,386 $ 7,513 $ 7,293
Other comprehensive income (loss) before reclassifications (51) (8) 43
Amounts reclassified from accumulated other comprehensive income (loss) 36 (7) (48)
Total other comprehensive income (loss), net of tax (15) (15) (5)
Ending balance 6,764 6,386 7,513
Total      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Beginning balance (87) (72) (67)
Ending balance (102) (87) (72)
Unrealized Net Gains (Losses) on Available-for-Sale Securities      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Beginning balance 0 0 (1)
Other comprehensive income (loss) before reclassifications 0 0 1
Amounts reclassified from accumulated other comprehensive income (loss) 0 0 0
Total other comprehensive income (loss), net of tax 0 0 1
Ending balance 0 0 0
Unrealized Net Gains (Losses) on Derivative Instruments      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Beginning balance 11 10 13
Other comprehensive income (loss) before reclassifications (59) 8 45
Amounts reclassified from accumulated other comprehensive income (loss) 36 (7) (48)
Total other comprehensive income (loss), net of tax (23) 1 (3)
Ending balance (12) 11 10
Foreign Currency Translation Adjustments      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Beginning balance (98) (82) (79)
Other comprehensive income (loss) before reclassifications 8 (16) (3)
Amounts reclassified from accumulated other comprehensive income (loss) 0   0
Total other comprehensive income (loss), net of tax 8 (16) (3)
Ending balance $ (90) $ (98) $ (82)