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Goodwill and Other Intangible Assets, Net - Components of Intangible Assets (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Jun. 30, 2025
--- | --- | ---
Intangible Asset, Acquired, Finite-Lived [Line Items] |  |
Gross Carrying Amount | $ 8,809 | $ 8,925
Accumulated amortization and impairment | (1,651) | (1,522)
Net Carrying Amount | 7,158 | 7,403
Customer relationships |  |
Intangible Asset, Acquired, Finite-Lived [Line Items] |  |
Gross Carrying Amount | 7,412 | 7,530
Accumulated amortization and impairment | (1,114) | (1,020)
Net Carrying Amount | 6,298 | 6,510
Computer software |  |
Intangible Asset, Acquired, Finite-Lived [Line Items] |  |
Gross Carrying Amount | 318 | 316
Accumulated amortization and impairment | (218) | (214)
Net Carrying Amount | 100 | 102
Finite-lived intangible assets, accumulated impairment loss | 13 | 13
Other |  |
Intangible Asset, Acquired, Finite-Lived [Line Items] |  |
Gross Carrying Amount | 1,079 | 1,079
Accumulated amortization and impairment | (319) | (288)
Net Carrying Amount | 760 | 791
Finite-lived intangible assets, accumulated impairment loss | $ 39 | $ 39

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