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Financial Instruments (Tables)
12 Months Ended
Mar. 31, 2022
Financial Instruments [Abstract]  
Fair Value Of Short-Term Investments
Short-term investments consisted of the following as of March 31, 2022 and 2021 (in millions):
 
As of March 31, 2022
As of March 31, 2021
 Cost or
Amortized
Cost
Gross UnrealizedFair
Value
Cost or
Amortized
Cost
Gross UnrealizedFair
Value
 GainsLossesGainsLosses
Corporate bonds$117 $— $(1)$116 $372 $— $— $372 
U.S. Treasury securities103 — (1)102 374 — 375 
U.S. agency securities— — — — — — 
Commercial paper39 — — 39 136 — — 136 
Foreign government securities17 — — 17 67 — — 67 
Asset-backed securities38 — — 38 112 — — 112 
Certificates of deposit18 — — 18 41 — — 41 
Short-term investments$332 $— $(2)$330 $1,105 $$— $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 March 31, 2022 and 2021 (in millions):
 
As of March 31, 2022
As of March 31, 2021
 Amortized
Cost
Fair
Value
Amortized
Cost
Fair
Value
Short-term investments
Due within 1 year$250 $249 $895 $896 
Due 1 year through 5 years77 76 203 203 
Due after 5 years
Short-term investments$332 $330 $1,105 $1,106