Commitments and Contingencies Commitments and Contingencies (Details) $ in Millions |
Sep. 30, 2022
USD ($)
|
|---|---|
| Commitments and Contingencies [Abstract] | |
| Letters of credit and completion bonds | $ 446.4 |
| Performance bonds outstanding | 344.8 |
| Performance letters of credit outstanding | 88.3 |
| Financial letters of credit | 8.4 |
| Financial letters of credit representing deposits on land and lot purchase agreements | 8.0 |
| Financial Bonds | 4.9 |
| Unrecorded conditional purchase obligation | $ 982.4 |