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Redeemable Noncontrolling Interests and Noncontrolling Interests - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Noncontrolling Interest [Line Items] |  |  |  |
Net income attributable to noncontrolling interests | $ 5 |  | $ 5 |
Net Income (Loss) Attributable to Noncontrolling Interest | 53 | $ 46 | 100 | $ 91
PRISM Vision LLC |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Redeemable noncontrolling interest | 25 |  | 25 |
PRISM Vision LLC | Noncontrolling Interests |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Adjustment to redemption values | 2 |  |  |
Core Ventures |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Redeemable noncontrolling interest | 700 |  | 700 |
Core Ventures | Noncontrolling Interests |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Adjustment to redemption values | 45 |  |  |
ClarusONE Sourcing Services, Vantage Oncology, SCRI Oncology, and Prism Vision |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Net Income (Loss) Attributable to Noncontrolling Interest | $ 48 | $ 46 | $ 95 | $ 91

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