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Intangible Assets
 3 Months Ended
Jun. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets Intangible Assets
Intangible assets consisted of the following:

As of June 30, 2025
As of March 31, 2025
(in millions)Gross Carrying ValueAccumulated AmortizationNet Carrying ValueGross Carrying ValueAccumulated AmortizationNet Carrying Value
Software$3,764 $3,279 $485 $3,713 $3,166 $547 
Customer related intangible assets3,980 3,091 889 3,886 2,933 953 
Other intangible assets291 154 137 284 142 142 
Total intangible assets$8,035 $6,524 $1,511 $7,883 $6,241 $1,642 

The components of amortization expense were as follows:

Three Months Ended
(in millions)June 30, 2025June 30, 2024
Intangible asset amortization
$180 $179 
Transition and transformation contract cost amortization(1)
45 53 
Total amortization expense$225 $232 
        

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

Estimated future amortization related to intangible assets as of June 30, 2025 is as follows:

Fiscal Year (in millions)
Remainder of 2026$519 
2027501 
2028228 
2029109 
203061 
Thereafter93 
Total$1,511