Derivative Financial Instruments (Tables)

6 Months Ended

Sep. 30, 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 September 30, 2020						As of March 31, 2020
	Notional Amount		Fair Value				Notional Amount		Fair Value
			Asset		Liability				Asset		Liability
Forward contracts to purchase	$	207	$	8	$	1	$	316	$	1	$	19
Forward contracts to sell	$	1,177	$	4	$	34	$	1,371	$	61	$	1

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 September 30, 2020						As of March 31, 2020
	Notional Amount		Fair Value				Notional Amount		Fair Value
			Asset		Liability				Asset		Liability
Forward contracts to purchase	$	608	$	—	$	8	$	388	$	1	$	16
Forward contracts to sell	$	1,012	$	7	$	1	$	292	$	13	$	—

Derivative Instruments, Gain (Loss)

	Three Months Ended September 30,								Six Months Ended September 30,
	2020				2019				2020				2019
	Net revenue		Research and development		Net revenue		Research and development		Net revenue		Research and development		Net revenue		Research and development
Total amounts presented in our Condensed Consolidated Statements of Operations in which the effects of cash flow hedges are recorded	$	1,151	$	421	$	1,348	$	387	$	2,610	$	859	$	2,557	$	768
Gains (losses) on foreign currency forward contracts designated as cash flow hedges	$	1	$	—	$	25	$	(1)	$	12	$	(6)	$	41	$	(7)

The effect of foreign currency forward contracts not designated as hedging instruments in our Condensed Consolidated Statements of Operations for the three and six months ended September 30, 2020 and 2019 was as follows (in millions):

	Three Months Ended September 30,				Six Months Ended September 30,
	2020		2019		2020		2019
	Interest and other income (expense), net
Total amounts presented in our Condensed Consolidated Statements of Operations in which the effects of balance sheet hedges are recorded	$	(10)	$	16	$	(13)	$	37
Gain (losses) on foreign currency forward contracts not designated as hedging instruments	$	(3)	$	1	$	(7)	$	(3)