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Goodwill and Intangible Assets, Net (Tables) | 6 Months Ended
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Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Changes in the Carrying Amount of Goodwill | Changes in the carrying amount of goodwill were as follows:
(In millions) | North American Pharmaceutical |  | Oncology & Multispecialty |  | Prescription Technology Solutions |  | Medical-Surgical Solutions |  | Other (2) |  | Total
Balance, March 31, 2025 | $ | 2,737 |  |  | $ | 2,724 |  |  | $ | 2,027 |  |  | $ | 2,507 |  |  | $ | 27 |  |  | $ | 10,022 |
Goodwill acquired | — |  |  | 1,238 |  |  | 39 |  |  | — |  |  | — |  |  | 1,277 |
Disposals | — |  |  | (9) |  |  | — |  |  | — |  |  | (28) |  |  | (37) |
Foreign currency translation adjustments, net | 44 |  |  | — |  |  | — |  |  | — |  |  | 1 |  |  | 45 |
Other adjustments (1) | — |  |  | (24) |  |  | — |  |  | — |  |  | — |  |  | (24) |
Balance, September 30, 2025 | $ | 2,781 |  |  | $ | 3,929 |  |  | $ | 2,066 |  |  | $ | 2,507 |  |  | $ | — |  |  | $ | 11,283 |
(1)Reflects acquisition-related adjustments of $21 million for Core Ventures and $3 million for PRISM Vision. (2)Primarily includes transfer of goodwill of $28 million to held-for-sale for the Norway disposal group.
Schedule of Information Regarding Intangible Assets | Information regarding intangible assets was as follows:
| September 30, 2025 |  | March 31, 2025
(Dollars in millions) | Weighted- Average Remaining Amortization Period (Years) |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Customer relationships | 10 |  | $ | 1,510 |  |  | $ | (690) |  |  | $ | 820 |  |  | $ | 1,475 |  |  | $ | (650) |  |  | $ | 825 |
Service agreements | 23 |  | 3,262 |  |  | (759) |  |  | 2,503 |  |  | 1,116 |  |  | (728) |  |  | 388 |
Trademarks and trade names | 20 |  | 570 |  |  | (284) |  |  | 286 |  |  | 378 |  |  | (278) |  |  | 100 |
Provider Networks | 22 |  | 360 |  |  | (8) |  |  | 352 |  |  | — |  |  | — |  |  | — |
Technology | 9 |  | 311 |  |  | (150) |  |  | 161 |  |  | 288 |  |  | (141) |  |  | 147 |
Other | 22 |  | 127 |  |  | (29) |  |  | 98 |  |  | 31 |  |  | (27) |  |  | 4 |
Total |  |  | $ | 6,140 |  |  | $ | (1,920) |  |  | $ | 4,220 |  |  | $ | 3,288 |  |  | $ | (1,824) |  |  | $ | 1,464 |
Schedule of Estimated Amortization Expense |
(In millions) |  | Estimated Amortization Expense
Fiscal 2026 (from October 1, 2025 to March 31, 2026) |  | $ | 144 |
Fiscal 2027 |  | 287 |
Fiscal 2028 |  | 283 |
Fiscal 2029 |  | 279 |
Fiscal 2030 |  | 276 |
Thereafter |  | 2,951 |

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