Location of Gain (Loss) Recognized in Income on Derivative, Non-Designated Hedging Instruments (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Net revenue	$ 6,991	$ 5,629	$ 5,537
Research and development	2,186	1,778	1,559
Other Nonoperating Income (Expense)	(48)	(29)	63
Interest And Other Income (Expense), Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	21	(19)	(4)
Sales Revenue, Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	(14)	(30)	71
Research and Development
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	$ 12	$ 4	$ (9)