Commitments and Contingencies - Warranty Claims (Details) - USD ($) $ in Millions |
3 Months Ended | |||
---|---|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
Sep. 30, 2023 |
Sep. 30, 2022 |
|
Movement in Standard Product Warranty Accrual [Roll Forward] | ||||
Standard Product Warranty Accrual | $ 531.8 | $ 464.0 | $ 512.4 | $ 454.3 |
Standard Product Warranty Accrual, Increase for Warranties Issued | 45.1 | 39.9 | ||
Standard Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties | 4.5 | 1.1 | ||
Standard Product Warranty Accrual, Decrease for Payments | $ 30.2 | $ 31.3 |