Accumulated Other Comprehensive Income (Loss) - Schedule of Changes in AOCI (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023		Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ (34)	$ 137	$ (67)	[1]	$ 15
Other comprehensive income (loss) before reclassifications	(39)	(113)	28		81
Amounts reclassified from accumulated other comprehensive income (loss)	(11)	(61)	(45)		(133)
Total other comprehensive income (loss), net of tax	(50)	(174)	(17)		(52)
Ending balance	(84)	(37)	(84)		(37)
Unrealized Net Gains (Losses) on Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(1)	(4)	(1)		(3)
Other comprehensive income (loss) before reclassifications	1	1	1		0
Amounts reclassified from accumulated other comprehensive income (loss)	0	1	0		1
Total other comprehensive income (loss), net of tax	1	2	1		1
Ending balance	0	(2)	0		(2)
Unrealized Net Gains (Losses) on Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	54	246	13		47
Other comprehensive income (loss) before reclassifications	(58)	(137)	17		134
Amounts reclassified from accumulated other comprehensive income (loss)	(11)	(62)	(45)		(134)
Total other comprehensive income (loss), net of tax	(69)	(199)	(28)		0
Ending balance	(15)	47	(15)		47
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(87)	(105)	(79)		(29)
Other comprehensive income (loss) before reclassifications	18	23	10		(53)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0		0
Total other comprehensive income (loss), net of tax	18	23	10		(53)
Ending balance	$ (69)	$ (82)	$ (69)		$ (82)

[1] Derived from audited Consolidated Financial Statements.