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Intangible Assets (Tables)
 12 Months Ended
Mar. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Summary of Amortizable Intangible Assets
The Company's estimated useful lives for finite-lived intangibles are shown in the table below:

Software
2 to 10 years
Customer related intangiblesExpected customer service life
Acquired contract related intangiblesContract life and first contract renewal, where applicable
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 
Schedule of Components of Amortization Expense
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.
Schedule of Estimated Future Intangible Asset Amortization
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