Summary Consolidated Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2021	Jul. 31, 2021	Apr. 30, 2021	Jan. 31, 2021	Oct. 31, 2020	Jul. 31, 2020	Apr. 30, 2020	Jan. 31, 2020	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Quarterly Summary of Income Statement Data [Abstract]
Revenues:									$ 8,790,361	$ 7,077,659	$ 7,223,966
Income before income taxes	$ 499,689	$ 303,395	$ 169,826	$ 127,405	$ 266,991	$ 151,865	$ 102,113	$ 65,932	1,100,315	586,901	787,170
Net income	$ 374,330	$ 234,932	$ 127,866	$ 96,499	$ 199,317	$ 114,761	$ 75,670	$ 56,876	$ 833,627	$ 446,624	$ 590,007
Earnings Per Share [Abstract]
Basic earnings (in dollars per share)	$ 3.06	$ 1.90	$ 1.03	$ 0.77	$ 1.57	$ 0.91	$ 0.59	$ 0.41	$ 6.72	$ 3.43	$ 4.07
Diluted earnings (in dollars per share)	$ 3.02	$ 1.87	$ 1.01	$ 0.76	$ 1.55	$ 0.90	$ 0.59	$ 0.41	$ 6.63	$ 3.40	$ 4.03
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Basic weighted-average shares	122,218	123,826	124,295	126,060	127,310	126,722	128,205	138,145	124,100	130,095	145,008
Weighted Average Number of Shares Outstanding, Diluted	124,057	125,610	125,999	127,562	128,892	127,399	128,809	139,889	125,807	131,247	146,501
Home Building [Member]
Quarterly Summary of Income Statement Data [Abstract]
Revenues:	$ 2,950,417	$ 2,234,365	$ 1,836,260	$ 1,410,704	$ 2,495,974	$ 1,627,812	$ 1,516,234	$ 1,297,337	$ 8,431,746	$ 6,937,357	$ 7,080,379
Gross Profit	694,373	508,241	401,767	288,911	502,079	341,704	295,256	264,215
Land [Member]
Quarterly Summary of Income Statement Data [Abstract]
Revenues:	90,963	21,116	93,864	152,672	49,693	23,677	32,838	34,094	$ 358,615	$ 140,302	$ 143,587
Gross Profit	$ 4,490	$ 2,407	$ 1,773	$ 40,938	$ 4,798	$ 1,418	$ 6,420	$ 1,812