Homebuilding Senior Notes and Other Debts Payable (Narrative) (Details) - USD ($)	6 Months Ended
	May 31, 2026	May 31, 2025	Jun. 26, 2026	Nov. 30, 2025	Jul. 31, 2025
Debt Instrument [Line Items]
Redemption of senior notes	$ 0	$ 500,000,000
Proceeds from issuance of senior notes	0	$ 700,000,000
Unsecured revolving credit facility | Delayed Draw Term Loan Facility
Debt Instrument [Line Items]
Maximum borrowings	1,700,000,000				$ 1,700,000,000
Line of Credit Facility, Accordion Feature	500,000,000
Homebuilding | Letter of Credit
Debt Instrument [Line Items]
Maximum borrowings	477,500,000
Homebuilding | Unsecured revolving credit facility
Debt Instrument [Line Items]
Maximum borrowings	3,125,000,000
Homebuilding | Unsecured revolving credit facility | Commitments - maturing in November 2029
Debt Instrument [Line Items]
Maximum borrowings	2,900,000,000
Homebuilding | Senior Notes
Debt Instrument [Line Items]
Debt issuance cost	$ 11,200,000			$ 7,000,000.0
Homebuilding | Senior Notes | 5.20% senior notes due 2030
Debt Instrument [Line Items]
Interest rate (percent)	5.20%
Homebuilding | Senior Notes | 5.25% senior notes due 2026
Debt Instrument [Line Items]
Interest rate (percent)	5.25%
Homebuilding | Senior Notes | 5.25% senior notes due 2026 | Subsequent Event
Debt Instrument [Line Items]
Interest rate (percent)			5.25%