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Summary of Significant Accounting Policies (Narrative) (Details) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2024 USD ($) | Nov. 30, 2024 USD ($) vote communities $ / shares shares | Nov. 30, 2023 USD ($) communities $ / shares shares | Nov. 30, 2022 USD ($) $ / shares shares
Segment Reporting Information [Line Items] |  |  |  |
Advertising costs |  | $ 190,900,000 | $ 146,000,000.0 | $ 102,100,000
Cash held in escrow |  | $ 265,600,000 | $ 594,800,000 |
Escrow deposit period |  | 2 days | 2 days |
Number of active communities | communities |  | 1,436 | 1,255 |
Land under Purchase Options, Deposit |  | $ 3,500,000,000 |  |
Held-to-maturity securities, term |  | 3 years |  |
Deferred tax assets after valuation allowance |  | $ 658,292,000 | $ 702,440,000 |
Deferred tax assets, valuation allowance |  | 2,593,000 | 2,333,000 |
Self-insurance reserve |  | 277,400,000 | 245,800,000 |
Compensation expense |  | 69,700,000 | 53,400,000 | $ 37,500,000
Right-of-use assets |  | 275,248,000 |  |
Operating lease liability |  | 262,119,000 |  |
Net deferred tax assets |  | 272,377,000 | 326,478,000 |
Impairment of long lived assets |  |  | $ 36,800,000 |
Impairment, Long-Lived Asset, Held-for-Use, Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  | Nonoperating Income (Expense) |
Stock Repurchase Program, Additional Shares Authorized For RepurchaseAmount | $ 5,000,000,000 |  |  |
Variable Interest Entity, Not Primary Beneficiary Including Third Parties |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Increase in consolidated inventory not owned |  | 1,100,000,000 |  |
Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Available-for-sale securities |  | 40,578,000 | $ 37,953,000 |
Held-to-maturity securities |  | 135,646,000 | 140,676,000 |
Investments in equity securities |  | $ 347,810,000 | $ 297,243,000 |
Executive Chairman |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Voting power |  | 40.00% |  |
Preferred Stock |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Preferred stock, shares authorized (in shares) | shares |  | 500,000 |  |
Preferred stock, par value (in usd per share) | $ / shares |  | $ 10 |  |
Participating Preferred Stock |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Preferred stock, shares authorized (in shares) | shares |  | 100,000,000 |  |
Preferred stock, par value (in usd per share) | $ / shares |  | $ 0.10 |  |
Preferred stock, shares issued (in shares) | shares |  | 0 | 0 |
Class A Common Stock |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Cash dividends (in USD per share) | $ / shares |  | $ 2.00 | $ 1.50 | $ 1.50
Votes per share | vote |  | 1 |  |
Class B Common Stock |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Cash dividends (in USD per share) | $ / shares |  | $ 2.00 | $ 1.50 | $ 1.50
Votes per share | vote |  | 10 |  |
Share Repurchase Program, Remaining Authorized, Amount |  | $ 3,400,000,000 |  |
Financial Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net deferred tax assets |  | 40,738,000 | $ 36,821,000 |
Financial Services | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Available-for-sale securities |  | 0 | 0 |
Held-to-maturity securities |  | 135,646,000 | 140,676,000 |
Investments in equity securities |  | 0 | 0 |
Lennar Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Available-for-sale securities |  | 40,600,000 | 38,000,000.0 |
Net deferred tax assets |  | 13,291,000 | 70,954,000 |
Lennar Other | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Available-for-sale securities |  | 40,578,000 | 37,953,000 |
Held-to-maturity securities |  | 0 | 0 |
Investments in equity securities |  | 347,810,000 | 297,243,000 |
Homebuilding |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales incentive, amount per home |  | $ 48,800 | $ 42,900 | $ 17,300
Sales incentive, amount per home, percentage |  | 10.30% | 8.80% | 3.50%
Inventory write-down |  | $ 5,100,000 | $ 19,900,000 |
Interest incurred |  | 129,300,000 | 187,600,000 | $ 230,800,000
Interest capitalized |  | 110,500,000 | 172,000,000.0 | $ 211,700,000
Net deferred tax assets |  | 146,299,000 | 163,917,000 |
Homebuilding | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Available-for-sale securities |  | 0 | 0 |
Held-to-maturity securities |  | 0 | 0 |
Investments in equity securities |  | $ 0 | $ 0 |
Stock Option Awards |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Expiration period |  | 10 years |  |
Nonvested shares |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Unrecognized compensation expense related to unvested share-based awards granted |  | $ 134,200,000 |  |
Weighted average remaining contractual life of unrecognized compensation expense related to unvested share-based awards |  | 1 year 9 months 18 days |  |
Nonvested shares vested (in shares) | shares |  | 1,665,703 | 2,000,000.0 | 1,600,000
Discount rate | Valuation Technique, Discounted Cash Flow |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Communities, unobservable inputs |  |  | 0.15 |
Operating properties |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Estimated useful life |  | 30 years |  |
Furniture, fixtures and equipment | Minimum |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Estimated useful life |  | 2 years |  |
Furniture, fixtures and equipment | Maximum |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Estimated useful life |  | 10 years |  |
Leasehold improvements |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Estimated useful life |  | 5 years |  |

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