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Commitments, Contingencies and Legal Proceedings - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2023 | Apr. 01, 2023
Commitment And Contingencies [Line Items] |  |  |
Reserve for estimated losses under repurchase agreements | $ 2.0 | $ 2.0 | $ 2.5
Contingent repurchase obligation | 297.1 | $ 297.1 |
Guarantee obligations term |  | 12 years |
Letters of Credit [Member] |  |  |
Commitment And Contingencies [Line Items] |  |  |
Contingent obligation | 34.0 | $ 34.0 |
Long-term Debt [Member] |  |  |
Commitment And Contingencies [Line Items] |  |  |
Contingent obligation | 12.6 | 12.6 |
Casualty Insurance Program [Member] |  |  |
Commitment And Contingencies [Line Items] |  |  |
Contingent obligation | 21.1 | 21.1 |
Bonding Agreements [Member] |  |  |
Commitment And Contingencies [Line Items] |  |  |
Contingent obligation | 0.3 | 0.3 |
Surety Bond [Member] |  |  |
Commitment And Contingencies [Line Items] |  |  |
Contingent obligation | $ 31.3 | $ 31.3 |

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