Supplemental Guarantor Information (Level 4 IS) (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Supplemental Condensed Consolidating Statement of Operations
Revenues	$ 1,913,353	$ 1,502,909	$ 4,688,020	$ 3,787,151
Cost of revenues	1,509,619	1,176,028	3,742,256	2,986,471
Selling, general and administrative	174,071	154,650	497,990	438,497
Total	1,683,690	1,330,678	4,240,246	3,424,968
Income (loss) from operations	229,663	172,231	447,774	362,183
Other [Abstract]
Income (loss) from unconsolidated entities	12,469	19,925	53,913	112,274
Other income - net	10,965	11,418	35,756	38,107
Intercompany interest income	0	0	0	0
Interest Expense	0	0	0	0
Income from subsidiaries	0	0	0	0
Income (loss) before income taxes	253,097	203,574	537,443	512,564
Income tax provision	59,839	55,011	100,268	168,947
Net income (loss)	193,258	148,563	437,175	343,617
Other Comprehensive Income (Loss), Net of Tax	170	167	512	504
Comprehensive Income (loss), Net of Tax, Attributable to Parent	193,428	148,730	437,687	344,121
Toll Brothers Inc. [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues
Cost of revenues
Selling, general and administrative	25	21	57	45
Total	25	21	57	45
Income (loss) from operations	(25)	(21)	(57)	(45)
Other [Abstract]
Income (loss) from unconsolidated entities
Other income - net		2,367		7,049
Intercompany interest income
Interest Expense
Income from subsidiaries	253,122	201,228	537,500	505,560
Income (loss) before income taxes	253,097	203,574	537,443	512,564
Income tax provision	59,839	55,011	100,268	168,947
Net income (loss)	193,258	148,563	437,175	343,617
Other Comprehensive Income (Loss), Net of Tax	170	167	512	504
Comprehensive Income (loss), Net of Tax, Attributable to Parent	193,428	148,730	437,687	344,121
Subsidiary Issuer [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues
Cost of revenues
Selling, general and administrative	770	1,045	2,397	3,010
Total	770	1,045	2,397	3,010
Income (loss) from operations	(770)	(1,045)	(2,397)	(3,010)
Other [Abstract]
Income (loss) from unconsolidated entities
Other income - net
Intercompany interest income	36,395	41,111	105,598	116,164
Interest Expense	(35,625)	(42,433)	(103,201)	(120,178)
Income from subsidiaries
Income (loss) before income taxes	0	(2,367)	0	(7,024)
Income tax provision		(839)		(2,556)
Net income (loss)	0	(1,528)	0	(4,468)
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	0	(1,528)	0	(4,468)
Guarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	1,865,613	1,459,115	4,492,956	3,699,032
Cost of revenues	1,468,135	1,128,705	3,561,287	2,896,053
Selling, general and administrative	181,793	162,388	514,921	459,606
Total	1,649,928	1,291,093	4,076,208	3,355,659
Income (loss) from operations	215,685	168,022	416,748	343,373
Other [Abstract]
Income (loss) from unconsolidated entities	10,010	2,746	16,743	11,224
Other income - net	6,605	8,827	19,288	19,969
Intercompany interest income	663	48	1,052	48
Interest Expense	(1,154)	(3,370)	(3,235)	(3,370)
Income from subsidiaries	22,627	24,954	88,280	129,056
Income (loss) before income taxes	254,436	201,227	538,876	500,300
Income tax provision	60,096	71,787	100,538	182,055
Net income (loss)	194,340	129,440	438,338	318,245
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	194,340	129,440	438,338	318,245
Nonguarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	91,975	94,422	329,633	224,120
Cost of revenues	52,247	65,595	223,990	145,229
Selling, general and administrative	21,209	20,207	61,543	55,385
Total	73,456	85,802	285,533	200,614
Income (loss) from operations	18,519	8,620	44,100	23,506
Other [Abstract]
Income (loss) from unconsolidated entities	2,459	17,179	37,170	101,050
Other income - net	1,186	673	5,252	9,482
Intercompany interest income	1,154	1,224	3,235	3,370
Interest Expense	(691)	(374)	(1,477)	(1,328)
Income from subsidiaries
Income (loss) before income taxes	22,627	27,322	88,280	136,080
Income tax provision	7,135	9,419	16,470	49,518
Net income (loss)	15,492	17,903	71,810	86,562
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	15,492	17,903	71,810	86,562
Eliminations [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	(44,235)	(50,628)	(134,569)	(136,001)
Cost of revenues	(10,763)	(18,272)	(43,021)	(54,811)
Selling, general and administrative	(29,726)	(29,011)	(80,928)	(79,549)
Total	(40,489)	(47,283)	(123,949)	(134,360)
Income (loss) from operations	(3,746)	(3,345)	(10,620)	(1,641)
Other [Abstract]
Income (loss) from unconsolidated entities
Other income - net	3,174	(449)	11,216	1,607
Intercompany interest income	(38,212)	(42,383)	(109,885)	(119,582)
Interest Expense	37,470	46,177	107,913	124,876
Income from subsidiaries	(275,749)	(226,182)	(625,780)	(634,616)
Income (loss) before income taxes	(277,063)	(226,182)	(627,156)	(629,356)
Income tax provision	(67,231)	(80,367)	(117,008)	(229,017)
Net income (loss)	(209,832)	(145,815)	(510,148)	(400,339)
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	$ (209,832)	$ (145,815)	$ (510,148)	$ (400,339)