Financial Instruments (Tables)

6 Months Ended

Sep. 30, 2021

Financial Instruments [Abstract]

Fair Value Of Short-Term Investments

Short-term investments consisted of the following as of September 30, 2021 and March 31, 2021 (in millions):

	As of September 30, 2021								As of March 31, 2021
	Cost or Amortized Cost		Gross Unrealized				Fair Value		Cost or Amortized Cost		Gross Unrealized				Fair Value
			Gains		Losses						Gains		Losses
Corporate bonds	$	152	$	—	$	—	$	152	$	372	$	—	$	—	$	372
U.S. Treasury securities	65		—		—		65		374		1		—		375
U.S. agency securities	—		—		—		—		3		—		—		3
Commercial paper	35		—		—		35		136		—		—		136
Foreign government securities	32		—		—		32		67		—		—		67
Asset-backed securities	40		—		—		40		112		—		—		112
Certificates of deposit	18		—		—		18		41		—		—		41
Short-term investments	$	342	$	—	$	—	$	342	$	1,105	$	1	$	—	$	1,106

Fair Value Of Short-Term Investments By Stated Maturity Date Schedule

The following table summarizes the amortized cost and fair value of our short-term investments, classified by stated maturity as of September 30, 2021 and March 31, 2021 (in millions):

	As of September 30, 2021				As of March 31, 2021
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Short-term investments
Due within 1 year	$	242	$	242	$	895	$	896
Due 1 year through 5 years	94		94		203		203
Due after 5 years	6		6		7		7
Short-term investments	$	342	$	342	$	1,105	$	1,106