Financial Instruments (Tables)

9 Months Ended

Dec. 31, 2021

Financial Instruments [Abstract]

Fair Value Of Short-Term Investments

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

	As of December 31, 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	$	148	$	—	$	—	$	148	$	372	$	—	$	—	$	372
U.S. Treasury securities	75		—		—		75		374		1		—		375
U.S. agency securities	—		—		—		—		3		—		—		3
Commercial paper	39		—		—		39		136		—		—		136
Foreign government securities	30		—		—		30		67		—		—		67
Asset-backed securities	38		—		—		38		112		—		—		112
Certificates of deposit	16		—		—		16		41		—		—		41
Short-term investments	$	346	$	—	$	—	$	346	$	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 December 31, 2021 and March 31, 2021 (in millions):

	As of December 31, 2021				As of March 31, 2021
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Short-term investments
Due within 1 year	$	244	$	244	$	895	$	896
Due 1 year through 5 years	98		98		203		203
Due after 5 years	4		4		7		7
Short-term investments	$	346	$	346	$	1,105	$	1,106