Derivative Financial Instruments (Tables)

12 Months Ended

Mar. 31, 2020

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Notional Amounts of Outstanding Derivative Positions

Total gross notional amounts and fair values for currency derivatives with cash flow hedge accounting designation are as follows (in millions):

	As of March 31, 2020						As of March 31, 2019
	Notional Amount		Fair Value				Notional Amount		Fair Value
			Asset		Liability				Asset		Liability
Forward contracts to purchase	$	316	$	1	$	19	$	295	$	—	$	10
Forward contracts to sell	$	1,371	$	61	$	1	$	1,355	$	31	$	4

Total gross notional amounts and fair values for currency derivatives that are not designated as hedging instruments are accounted for as follows (in millions):

	As of March 31, 2020						As of March 31, 2019
	Notional Amount		Fair Value				Notional Amount		Fair Value
			Asset		Liability				Asset		Liability
Forward contracts to purchase	$	388	$	1	$	16	$	449	$	—	$	2
Forward contracts to sell	$	292	$	13	$	—	$	394	$	2	$	—

Derivative Instruments, Gain (Loss)

	Amount of Gain (Loss) Recognized in the Statements of Operations
	Year Ended March 31,
	2020				2019				2018
	Net revenue		Research and development		Net revenue		Research and development		Net revenue		Research and development
Total amounts presented in our Consolidated Statements of Operations in which the effects of cash flow hedges are recorded	$	5,537	$	1,559	$	4,950	$	1,433	$	5,150	$	1,320
Gains (losses) on foreign currency forward contracts designated as cash flow hedges	$	71	$	(9)	$	18	$	(10)	$	(10)	$	5

The effect of foreign currency forward contracts not designated as hedging instruments in our Consolidated Statements of Operations for the fiscal years ended March 31, 2020, 2019 and 2018, was as follows (in millions):

	Amount of Gain (Loss) Recognized in the Statements of Operations
	Year Ended March 31,
	2020		2019		2018
	Interest and other income (expense), net
Total amounts presented in our Consolidated Statements of Operations in which the effects of balance sheet hedges are recorded	$	63	$	83	$	15
Gain (losses) on foreign currency forward contracts not designated as hedging instruments	$	(4)	$	25	$	(26)