Commitments and Contingencies Commitments and Contingencies (Details) $ in Millions	Jun. 30, 2022 USD ($)
Commitments and Contingencies [Abstract]
Letters of credit and completion bonds	$ 426.0
Performance bonds outstanding	315.3
Performance letters of credit outstanding	92.9
Financial letters of credit	12.9
Financial letters of credit representing deposits on land and lot purchase agreements	12.4
Financial Bonds	4.9
Unrecorded conditional purchase obligation	$ 1,100.0