Summary Consolidated Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	1 Months Ended	3 Months Ended								12 Months Ended
	Feb. 29, 2024	Oct. 31, 2024	Jul. 31, 2024	Apr. 30, 2024	Jan. 31, 2024	Oct. 31, 2023	Jul. 31, 2023	Apr. 30, 2023	Jan. 31, 2023	Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2022
Quarterly Summary of Income Statement Data [Abstract]
Revenue from Contract with Customer, Including Assessed Tax										$ 10,846,740	$ 9,994,937	$ 10,275,558
Income (loss) before income taxes		$ 621,073	$ 503,627	$ 649,779	$ 311,161	$ 604,966	$ 553,017	$ 430,592	$ 253,796	2,085,640	1,842,371	1,703,726
Net income		$ 475,409	$ 374,611	$ 481,617	$ 239,558	$ 445,536	$ 414,789	$ 320,216	$ 191,530	$ 1,571,195	$ 1,372,071	$ 1,286,500
Earnings Per Share [Abstract]
Basic earnings (in dollars per share)		$ 4.67	$ 3.64	$ 4.60	$ 2.28	$ 4.15	$ 3.77	$ 2.88	$ 1.72	$ 15.16	$ 12.47	$ 11.02
Diluted earnings (in dollars per share)		$ 4.63	$ 3.60	$ 4.55	$ 2.25	$ 4.11	$ 3.73	$ 2.85	$ 1.70	$ 15.01	$ 12.36	$ 10.90
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Basic weighted-average shares		101,716	102,980	104,794	105,122	107,465	110,003	111,214	111,397	103,653	110,020	116,771
Weighted Average Number of Shares Outstanding, Diluted		102,676	104,014	105,803	106,265	108,388	111,123	112,184	112,336	104,690	111,008	117,975
Mid-Atlantic [Member]
Quarterly Summary of Income Statement Data [Abstract]
Revenue from Contract with Customer, Including Assessed Tax										$ 1,422,018	$ 1,175,348	$ 1,148,966
Income (loss) before income taxes										471,478	243,464	189,485
Home Building [Member]
Quarterly Summary of Income Statement Data [Abstract]
Revenue from Contract with Customer, Including Assessed Tax		$ 3,260,004	$ 2,724,472	$ 2,647,020	$ 1,931,836	$ 2,951,904	$ 2,674,602	$ 2,490,098	$ 1,749,422	10,563,332	9,866,026	9,711,170
Gross Profit		846,324	747,310	683,737	532,610	810,375	742,653	657,220	448,499
Land [Member]
Quarterly Summary of Income Statement Data [Abstract]
Revenue from Contract with Customer, Including Assessed Tax		73,458	3,472	190,466	16,012	68,243	13,040	16,881	30,747	283,408	128,911	564,388
Gross Profit		$ 34,465	$ (5,306)	177,487	$ 5,851	$ (10,351)	$ 1,462	$ (3,969)	$ (11,688)
Land [Member] | Mid-Atlantic [Member]
Quarterly Summary of Income Statement Data [Abstract]
Revenue from Contract with Customer, Including Assessed Tax	$ 185,000			185,000						$ 208,436	$ 13,169	$ 38,423
Gross Profit				$ 124,100