Location of Income (Expense) Recognized in Income on Derivative, Non-Designated Hedging Instruments (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Derivative
Net revenue	$ 1,459	$ 1,209
Research and development	438	381
Interest and other income (expense), net	(3)	21
Sales Revenue, Net
Derivative
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	11	16
Research And Development [Member]
Derivative
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	(6)	(6)
Interest and Other Income (Expense), net
Derivative
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ (4)	$ (4)