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Intangible Assets (Tables) | 12 Months Ended
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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 intangibles | Expected customer service life
Acquired contract related intangibles | Contract life and first contract renewal, where applicable
Intangible assets consisted of the following:
|  | As of March 31, 2025 |  | As of March 31, 2024
(in millions) |  | Gross Carrying Value |  | Accumulated Amortization |  | Net Carrying Value |  | Gross Carrying Value |  | Accumulated Amortization |  | Net Carrying Value
Software |  | $ | 3,713 |  |  | $ | 3,166 |  |  | $ | 547 |  |  | $ | 3,721 |  |  | $ | 3,070 |  |  | $ | 651 |
Customer related intangible assets |  | 3,886 |  |  | 2,933 |  |  | 953 |  |  | 3,892 |  |  | 2,588 |  |  | 1,304 |
Other intangible assets |  | 284 |  |  | 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, 2025 |  | March 31, 2024 |  | March 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 |
2027 |  | 491 |
2028 |  | 215 |
2029 |  | 102 |
2030 |  | 57 |
Thereafter |  | 90 |
Total |  | $ | 1,642 |

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