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Commitments and Contingencies (Narratives) (Details) | 3 Months Ended |
--- | --- | ---
Feb. 29, 2020 USD ($) claim_filed Home | Nov. 30, 2019 USD ($)
Loss Contingencies [Line Items] |  |
Minimum warranty on electrical and other building systems (in years) | 2 years |
Maximum warranty on electrical and other building systems (in years) | 5 years |
Warranty for other components of the home (in years) | 1 year |
Performance bonds | $ 817,500,000 | $ 793,900,000
Letters of credit outstanding | $ 45,800,000 | 34,700,000
Warranty for other components of a home (in years) | 1 year |
Cash deposits | $ 75,606,000 | 75,186,000
Aggregate purchase price of land | $ 1,392,865,000 | 1,423,519,000
Damages from Product Defects [Member] |  |
Loss Contingencies [Line Items] |  |
Structural warranty provided by the company (in years) | 10 years |
Minimum number of affected homes for construction defect claims | Home | 2 |
Warranty Obligations [Member] |  |
Loss Contingencies [Line Items] |  |
Structural warranty provided by the company (in years) | 10 years |
Self Insurance [Member] |  |
Loss Contingencies [Line Items] |  |
Recoveries related to warranty and other claims | $ 50,800,000 | $ 50,600,000
Northern California Townhome Community [Member] |  |
Loss Contingencies [Line Items] |  |
Loss Contingency Accrual | $ 25,000,000.0 |
Chapter 558 of the Florida Statutes [Member] |  |
Loss Contingencies [Line Items] |  |
Outstanding noticed claims | claim_filed | 480 |
Maximum [Member] | Northern California Townhome Community [Member] |  |
Loss Contingencies [Line Items] |  |
Product Liability Contingency, Loss Exposure in Excess of Accrual, Best Estimate | $ 8,000,000.0 |
Minimum [Member] | Northern California Townhome Community [Member] |  |
Loss Contingencies [Line Items] |  |
Product Liability Contingency, Loss Exposure in Excess of Accrual, Best Estimate | $ 0 |

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