Commitments and Contingencies - Warranty Claims (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||||||
---|---|---|---|---|---|---|---|---|
Jun. 30, 2022 |
Jun. 30, 2021 |
Jun. 30, 2022 |
Jun. 30, 2021 |
Mar. 31, 2022 |
Sep. 30, 2021 |
Mar. 31, 2021 |
Sep. 30, 2020 |
|
Movement in Standard Product Warranty Accrual [Roll Forward] | ||||||||
Standard Product Warranty Accrual | $ 431.8 | $ 361.5 | $ 431.8 | $ 361.5 | $ 407.8 | $ 376.3 | $ 340.7 | $ 310.2 |
Standard Product Warranty Accrual, Increase for Warranties Issued | 49.1 | 41.8 | 131.6 | 111.5 | ||||
Standard Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties | 5.8 | 1.7 | 13.1 | 5.4 | ||||
Standard Product Warranty Accrual, Decrease for Payments | $ 30.9 | $ 22.7 | $ 89.2 | $ 65.6 |