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Equity and Noncontrolling Interests - Narrative (Details) - USD ($) |  | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Mar. 31, 2023 | Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2024 | Mar. 31, 2023 | Sep. 30, 2023 | Nov. 30, 2022
Equity [Abstract] |  |  |  |  |  |  |
Aggregate amount |  |  |  |  |  |  | $ 600,000,000
Stock repurchased and retired during period (in shares) |  |  | 1,460,990 | 4,464,348 |  | 1,756,777 |
Average repurchase price per share (in dollars per share) |  |  | $ 34.22 | $ 33.60 |  | $ 37.00 |
Stock repurchased and retired during period, value | $ 28,000,000 |  | $ 50,000,000 | $ 150,000,000 |  | $ 65,000,000 |
Stock repurchased during period, value |  | $ 50,000,000 | $ 30,000,000 | 150,000,000 | $ 30,000,000 |  |
Stock repurchase program, remaining authorized repurchase amount |  | $ 385,000,000 |  | $ 385,000,000 |  |  |

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