Supplemental Guarantor Information (Level 4 IS) (Details 2) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2017	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2017	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Supplemental Condensed Consolidating Statement of Operations
Revenues	$ 2,027,907	$ 1,502,909	$ 1,363,512	$ 920,730	$ 1,855,451	$ 1,269,934	$ 1,115,557	$ 928,566	$ 5,815,058	$ 5,169,508	$ 4,171,248
Cost of revenues									4,562,303	4,144,065	3,269,270
Selling, general and administrative									607,819	535,382	455,108
Total									5,170,122	4,679,447	3,724,378
Income (loss) from operations									644,936	490,061	446,870
Other [Abstract]
Income (loss) from unconsolidated entities									116,066	40,748	21,119
Other income - net									53,309	58,218	67,573
Intercompany interest income									0	0	0
Interest Expense									0	0	0
Loss from subsidiaries									0	0	0
Income (loss) before income tax benefit	301,747	203,574	199,209	109,781	168,160	163,653	140,397	116,817	814,311	589,027	535,562
Income tax provision									278,816	206,932	172,395
Net income	$ 191,878	$ 148,563	$ 124,638	$ 70,416	$ 114,378	$ 105,483	$ 89,054	$ 73,180	535,495	382,095	363,167
Other Comprehensive Income (Loss), Net of Tax									1,426	(827)	329
Comprehensive Income (Loss), Net of Tax, Attributable to Parent									536,921	381,268	363,496
Toll Brothers Inc. [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues
Cost of revenues
Selling, general and administrative									58	75	113
Total									58	75	113
Income (loss) from operations									(58)	(75)	(113)
Other [Abstract]
Income (loss) from unconsolidated entities
Other income - net									10,574	9,501	9,429
Intercompany interest income
Interest Expense
Loss from subsidiaries									803,795	579,601	526,246
Income (loss) before income tax benefit									814,311	589,027	535,562
Income tax provision									278,816	206,932	172,395
Net income									535,495	382,095	363,167
Other Comprehensive Income (Loss), Net of Tax									1,426	(858)	311
Comprehensive Income (Loss), Net of Tax, Attributable to Parent									536,921	381,237	363,478
Subsidiary Issuer [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues
Cost of revenues
Selling, general and administrative									4,033	3,809	3,560
Total									4,033	3,809	3,560
Income (loss) from operations									(4,033)	(3,809)	(3,560)
Other [Abstract]
Income (loss) from unconsolidated entities
Other income - net
Intercompany interest income									156,366	145,828	137,362
Interest Expense									(162,882)	(151,410)	(143,193)
Loss from subsidiaries
Income (loss) before income tax benefit									(10,549)	(9,391)	(9,391)
Income tax provision									(3,612)	(3,299)	(3,628)
Net income									(6,937)	(6,092)	(5,763)
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (Loss), Net of Tax, Attributable to Parent									(6,937)	(6,092)	(5,763)
Guarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues									5,668,610	4,984,356	4,213,776
Cost of revenues									4,414,461	3,919,729	3,276,078
Selling, general and administrative									635,247	558,822	481,943
Total									5,049,708	4,478,551	3,758,021
Income (loss) from operations									618,902	505,805	455,755
Other [Abstract]
Income (loss) from unconsolidated entities									12,271	16,913	14,034
Other income - net									28,900	27,873	34,098
Intercompany interest income									48
Interest Expense									(4,365)
Loss from subsidiaries									142,779	29,010	22,359
Income (loss) before income tax benefit									798,535	579,601	526,246
Income tax provision									273,418	203,614	203,296
Net income									525,117	375,987	322,950
Other Comprehensive Income (Loss), Net of Tax										31	18
Comprehensive Income (Loss), Net of Tax, Attributable to Parent									525,117	376,018	322,968
Non-Guarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues									336,671	361,685	77,226
Cost of revenues									223,243	288,044	12,909
Selling, general and administrative									77,115	74,328	60,377
Total									300,358	362,372	73,286
Income (loss) from operations									36,313	(687)	3,940
Other [Abstract]
Income (loss) from unconsolidated entities									103,795	23,835	7,085
Other income - net									10,674	17,456	21,724
Intercompany interest income									4,365
Interest Expense									(1,819)	(2,203)	(999)
Loss from subsidiaries
Income (loss) before income tax benefit									153,328	38,401	31,750
Income tax provision									52,500	13,490	12,265
Net income									100,828	24,911	19,485
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (Loss), Net of Tax, Attributable to Parent									100,828	24,911	19,485
Eliminations [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues									(190,223)	(176,533)	(119,754)
Cost of revenues									(75,401)	(63,708)	(19,717)
Selling, general and administrative									(108,634)	(101,652)	(90,885)
Total									(184,035)	(165,360)	(110,602)
Income (loss) from operations									(6,188)	(11,173)	(9,152)
Other [Abstract]
Income (loss) from unconsolidated entities
Other income - net									3,161	3,388	2,322
Intercompany interest income									(160,779)	(145,828)	(137,362)
Interest Expense									169,066	153,613	144,192
Loss from subsidiaries									(946,574)	(608,611)	(548,605)
Income (loss) before income tax benefit									(941,314)	(608,611)	(548,605)
Income tax provision									(322,306)	(213,805)	(211,933)
Net income									(619,008)	(394,806)	(336,672)
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (Loss), Net of Tax, Attributable to Parent									$ (619,008)	$ (394,806)	$ (336,672)