Commitments and Contingencies - Surety Bonds and Letters of Credit and Backlog (Details) $ in Millions	Jul. 31, 2025 USD ($) home
Backlog Information
Number of homes to be delivered | home	5,492
Aggregate sales value of outstanding homes to be delivered	$ 6,380.0
Other Letter Of Credit Facility
Loss Contingencies [Line Items]
Outstanding letter of credit	29.0
Feb 2030 Revolving Credit Facility Extension Agreement
Loss Contingencies [Line Items]
Outstanding letter of credit	158.5
Surety Bond Construction Improvements
Loss Contingencies [Line Items]
Surety bonds outstanding amount	852.5
Surety Bond Other Obligations
Loss Contingencies [Line Items]
Additional outstanding surety bonds	397.1
Financial Guarantee
Loss Contingencies [Line Items]
Surety bonds outstanding amount	$ 58.1