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Intangible Assets
 12 Months Ended
Mar. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets Intangible Assets
Intangible assets consisted of the following:
As of March 31, 2025As of March 31, 2024
(in millions)Gross Carrying ValueAccumulated AmortizationNet Carrying ValueGross Carrying ValueAccumulated AmortizationNet Carrying Value
Software$3,713 $3,166 $547 $3,721 $3,070 $651 
Customer related intangible assets3,886 2,933 953 3,892 2,588 1,304 
Other intangible assets284 142 142 309 134 175 
Total intangible assets$7,883 $6,241 $1,642 $7,922 $5,792 $2,130 

The components of amortization expense were as follows:
Fiscal Years Ended
(in millions)March 31, 2025March 31, 2024March 31, 2023
Intangible asset amortization $731 $759 $796 
Transition and transformation contract cost amortization(1)
205 212 204 
Total amortization expense$936 $971 $1,000 
        

(1)Transition and transformation contract costs are included within other assets on the balance sheet.

Estimated future intangible asset amortization as of March 31, 2025 is as follows:
Fiscal Year(in millions)
2026$687 
2027491 
2028215 
2029102 
203057 
Thereafter90 
Total$1,642