Supplemental Guarantor Information (Level 4 IS) (Details 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017
Supplemental Condensed Consolidating Statement of Operations
Revenues	$ 1,599,199	$ 1,363,512	$ 2,774,667	$ 2,284,242
Cost of revenues	1,298,157	1,077,441	2,232,637	1,810,443
Selling, general and administrative	166,652	146,752	323,919	283,847
Total	1,464,809	1,224,193	2,556,556	2,094,290
Income (loss) from operations	134,390	139,319	218,111	189,952
Other [Abstract]
Income (loss) from unconsolidated entities	2,564	45,904	41,444	92,349
Other income - net	15,794	13,986	24,791	26,689
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	152,748	199,209	284,346	308,990
Income tax provision	40,938	74,571	40,429	113,936
Net income (loss)	111,810	124,638	243,917	195,054
Other Comprehensive Income (Loss), Net of Tax	170	168	341	337
Comprehensive Income (loss), Net of Tax, Attributable to Parent	111,980	124,806	244,258	195,391
Toll Brothers Inc. [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues
Cost of revenues
Selling, general and administrative	14	24	32	24
Total	14	24	32	24
Income (loss) from operations	(14)	(24)	(32)	(24)
Other [Abstract]
Income (loss) from unconsolidated entities
Other income - net		2,289		4,682
Intercompany interest income
Interest Expense
Income from subsidiaries	152,762	196,944	284,378	304,332
Income (loss) before income taxes	152,748	199,209	284,346	308,990
Income tax provision	40,938	74,571	40,429	113,936
Net income (loss)	111,810	124,638	243,917	195,054
Other Comprehensive Income (Loss), Net of Tax	170	168	341	337
Comprehensive Income (loss), Net of Tax, Attributable to Parent	111,980	124,806	244,258	195,391
Subsidiary Issuer [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues
Cost of revenues
Selling, general and administrative	787	997	1,627	1,965
Total	787	997	1,627	1,965
Income (loss) from operations	(787)	(997)	(1,627)	(1,965)
Other [Abstract]
Income (loss) from unconsolidated entities
Other income - net
Intercompany interest income	36,508	38,557	69,203	75,053
Interest Expense	(35,721)	(39,850)	(67,576)	(77,745)
Income from subsidiaries
Income (loss) before income taxes	0	(2,290)	0	(4,657)
Income tax provision		(868)		(1,717)
Net income (loss)	0	(1,422)	0	(2,940)
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	0	(1,422)	0	(2,940)
Guarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	1,511,989	1,324,094	2,627,343	2,239,917
Cost of revenues	1,218,344	1,043,091	2,093,152	1,767,348
Selling, general and administrative	171,049	153,337	333,128	297,218
Total	1,389,393	1,196,428	2,426,280	2,064,566
Income (loss) from operations	122,596	127,666	201,063	175,351
Other [Abstract]
Income (loss) from unconsolidated entities	1,601	3,334	6,733	8,478
Other income - net	6,798	3,891	12,683	11,142
Intercompany interest income	389		389
Interest Expense	(1,058)		(2,081)
Income from subsidiaries	23,752	62,054	65,653	104,102
Income (loss) before income taxes	154,078	196,945	284,440	299,073
Income tax provision	52,971	73,647	40,442	110,268
Net income (loss)	101,107	123,298	243,998	188,805
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	101,107	123,298	243,998	188,805
Nonguarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	133,544	84,002	237,658	129,698
Cost of revenues	94,256	50,163	171,743	79,634
Selling, general and administrative	20,161	18,230	40,334	35,178
Total	114,417	68,393	212,077	114,812
Income (loss) from operations	19,127	15,609	25,581	14,886
Other [Abstract]
Income (loss) from unconsolidated entities	963	42,570	34,711	83,871
Other income - net	3,022	4,309	4,066	8,809
Intercompany interest income	1,058	2,146	2,081	2,146
Interest Expense	(418)	(291)	(786)	(954)
Income from subsidiaries
Income (loss) before income taxes	23,752	64,343	65,653	108,758
Income tax provision	(2,527)	24,173	9,335	40,099
Net income (loss)	26,279	40,170	56,318	68,659
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	26,279	40,170	56,318	68,659
Eliminations [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	(46,334)	(44,584)	(90,334)	(85,373)
Cost of revenues	(14,443)	(15,813)	(32,258)	(36,539)
Selling, general and administrative	(25,359)	(25,836)	(51,202)	(50,538)
Total	(39,802)	(41,649)	(83,460)	(87,077)
Income (loss) from operations	(6,532)	(2,935)	(6,874)	1,704
Other [Abstract]
Income (loss) from unconsolidated entities
Other income - net	5,974	3,497	8,042	2,056
Intercompany interest income	(37,955)	(40,703)	(71,673)	(77,199)
Interest Expense	37,197	40,141	70,443	78,699
Income from subsidiaries	(176,514)	(258,998)	(350,031)	(408,434)
Income (loss) before income taxes	(177,830)	(258,998)	(350,093)	(403,174)
Income tax provision	(50,444)	(96,952)	(49,777)	(148,650)
Net income (loss)	(127,386)	(162,046)	(300,316)	(254,524)
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	$ (127,386)	$ (162,046)	$ (300,316)	$ (254,524)