Inventory Impairments and Land Option Contract Abandonments (Narratives) (Details) $ in Millions	3 Months Ended
	Feb. 28, 2023 USD ($) lot community	Feb. 28, 2022 USD ($)	Nov. 30, 2022 USD ($) community
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Number of land parcels or communities evaluated for recoverability | community	4		5
Carrying value of communities of land parcels evaluated for impairment	$ 72.0		$ 118.7
Inventory impairment charges	0.0	$ 0.0
Aggregate carrying value of inventory impacted by pretax, noncash inventory impairment charges	$ 91.9		$ 102.9
Number of communities and various other land parcels impacted by pretax, noncash inventory impairment charges	7		8
Land Option Contract Abandonment
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Land option abandonments	$ 5.3	$ 0.2