Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 66	$ 211	$ 564	$ 761
Other comprehensive income (loss), net of tax:
Net gains (losses) on available-for-sale securities	(1)	(2)	(1)	6
Net gains (losses) on derivative instruments	10	(26)	66	(106)
Foreign currency translation adjustments	(1)	23	(9)	56
Total other comprehensive income (loss), net of tax	8	(5)	56	(44)
Total comprehensive income (loss)	$ 74	$ 206	$ 620	$ 717