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Redeemable Noncontrolling Interests and Noncontrolling Interests - Schedule of Changes in Redeemable Noncontrolling Interests and Noncontrolling Interests (Details) - USD ($) $ in Millions |  |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | ---
Jun. 02, 2025 | Apr. 01, 2025 | Sep. 30, 2025 | Jun. 30, 2025 | Sep. 30, 2024 | Jun. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Equity, Attributable to Noncontrolling Interest [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  | $ (1,694) | $ (1,588) | $ (1,694) | $ (1,381) | $ (1,599) | $ (1,694) | $ (1,599)
Beginning balance, redeemable noncontrolling interests |  | 0 |  | 0 |  |  | 0 |
Net income attributable to noncontrolling interests |  |  | 1,163 |  | 287 |  | 1,994 | 1,247
Net income |  |  | 1,158 |  | 287 |  | 1,989 | 1,247
Net income attributable to noncontrolling interests |  |  | 5 |  |  |  | 5 |
Payments to noncontrolling interests |  |  | (44) |  | (45) |  | (91) | (88)
Adjustment to redemption values |  |  | 47 |  |  |  | 47 |
Other |  |  | 1 |  | (2) |  | (1) | (2)
Ending balance |  |  | (1,355) | (1,588) | (2,642) | (1,381) | (1,355) | (2,642)
Ending balance, redeemable noncontrolling interests |  |  | 777 |  |  |  | 777 |
PRISM Vision LLC |  |  |  |  |  |  |  |
Equity, Attributable to Noncontrolling Interest [Roll Forward] |  |  |  |  |  |  |  |
Acquisition |  | 25 |  |  |  |  |  |
Core Ventures |  |  |  |  |  |  |  |
Equity, Attributable to Noncontrolling Interest [Roll Forward] |  |  |  |  |  |  |  |
Acquisition | $ 700 |  |  |  |  |  |  |
Noncontrolling Interests |  |  |  |  |  |  |  |
Equity, Attributable to Noncontrolling Interest [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  | 380 | 379 | 380 | 374 | 372 | 380 | 372
Net income attributable to noncontrolling interests |  |  |  | 47 |  | 45 |  |
Net income |  |  | 48 |  | 46 |  | 95 | 91
Payments to noncontrolling interests |  |  | (44) | (47) | (45) | (43) | (91) | (88)
Adjustment to redemption values |  |  | 0 |  | 0 |  |  |
Other |  |  | 1 | (1) | 0 | 0 |  |
Ending balance |  |  | 384 | 379 | $ 375 | 374 | 384 | $ 375
Noncontrolling Interests | PRISM Vision LLC |  |  |  |  |  |  |  |
Equity, Attributable to Noncontrolling Interest [Roll Forward] |  |  |  |  |  |  |  |
Acquisition |  |  |  | 0 |  | 0 |  |
Noncontrolling Interests | Core Ventures |  |  |  |  |  |  |  |
Equity, Attributable to Noncontrolling Interest [Roll Forward] |  |  |  |  |  |  |  |
Acquisition |  |  |  | 0 |  | $ 0 |  |
Redeemable Noncontrolling Interests |  |  |  |  |  |  |  |
Equity, Attributable to Noncontrolling Interest [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance, redeemable noncontrolling interests |  | $ 0 | 725 | 0 |  |  | 0 |
Net income attributable to noncontrolling interests |  |  | 5 | 0 |  |  |  |
Payments to noncontrolling interests |  |  | 0 | 0 |  |  |  |
Adjustment to redemption values |  |  | 47 |  |  |  |  |
Other |  |  | 0 | 0 |  |  |  |
Ending balance, redeemable noncontrolling interests |  |  | $ 777 | 725 |  |  | $ 777 |
Redeemable Noncontrolling Interests | PRISM Vision LLC |  |  |  |  |  |  |  |
Equity, Attributable to Noncontrolling Interest [Roll Forward] |  |  |  |  |  |  |  |
Acquisition |  |  |  | 25 |  |  |  |
Redeemable Noncontrolling Interests | Core Ventures |  |  |  |  |  |  |  |
Equity, Attributable to Noncontrolling Interest [Roll Forward] |  |  |  |  |  |  |  |
Acquisition |  |  |  | $ 700 |  |  |  |

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