Supplemental Guarantor Information (Level 4 IS) (Details 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Supplemental Condensed Consolidating Statement of Operations
Revenues	$ 1,716,094	$ 1,599,199	$ 3,079,275	$ 2,774,667
Cost of revenues	1,377,268	1,298,157	2,453,766	2,232,637
Selling, general and administrative	178,371	166,652	340,609	323,919
Total		1,464,809		2,556,556
Income (loss) from operations	160,455	134,390	284,900	218,111
Other [Abstract]
Income (loss) from unconsolidated entities	4,419	2,564	10,559	41,444
Other income - net	11,285	15,794	32,146	24,791
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	176,159	152,748	327,605	284,346
Income tax provision	46,835	40,938	86,231	40,429
Net income (loss)	129,324	111,810	241,374	243,917
Other Comprehensive Income (Loss), Net of Tax	56	170	112	341
Comprehensive Income (loss), Net of Tax, Attributable to Parent	129,380	111,980	241,486	244,258
Toll Brothers Inc. [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	0		0
Cost of revenues	0		0
Selling, general and administrative	101	14	491	32
Total		14		32
Income (loss) from operations	(101)	(14)	(491)	(32)
Other [Abstract]
Income (loss) from unconsolidated entities
Other income - net
Intercompany interest income
Interest Expense
Income from subsidiaries	176,260	152,762	328,096	284,378
Income (loss) before income taxes	176,159	152,748	327,605	284,346
Income tax provision	46,835	40,938	86,231	40,429
Net income (loss)	129,324	111,810	241,374	243,917
Other Comprehensive Income (Loss), Net of Tax	56	170	112	341
Comprehensive Income (loss), Net of Tax, Attributable to Parent	129,380	111,980	241,486	244,258
Subsidiary Issuer [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	0		0
Cost of revenues	0		0
Selling, general and administrative	662	787	1,395	1,627
Total		787		1,627
Income (loss) from operations	(662)	(787)	(1,395)	(1,627)
Other [Abstract]
Income (loss) from unconsolidated entities
Other income - net
Intercompany interest income	32,883	36,508	67,004	69,203
Interest Expense	(32,221)	(35,721)	(65,609)	(67,576)
Income from subsidiaries
Income (loss) before income taxes	0	0	0	0
Income tax provision
Net income (loss)	0	0	0	0
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	0	0	0	0
Guarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	1,690,615	1,511,989	2,998,144	2,627,343
Cost of revenues	1,348,732	1,218,344	2,373,765	2,093,152
Selling, general and administrative	185,133	171,049	355,050	333,128
Total		1,389,393		2,426,280
Income (loss) from operations	156,750	122,596	269,329	201,063
Other [Abstract]
Income (loss) from unconsolidated entities	3,154	1,601	8,541	6,733
Other income - net	6,758	6,798	12,255	12,683
Intercompany interest income	343	389	870	389
Interest Expense	(1,475)	(1,058)	(2,980)	(2,081)
Income from subsidiaries	10,730	23,752	40,081	65,653
Income (loss) before income taxes	176,260	154,078	328,096	284,440
Income tax provision	46,859	52,971	86,355	40,442
Net income (loss)	129,401	101,107	241,741	243,998
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	129,401	101,107	241,741	243,998
Nonguarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	71,231	133,544	171,658	237,658
Cost of revenues	46,525	94,256	113,766	171,743
Selling, general and administrative	17,342	20,161	36,095	40,334
Total		114,417		212,077
Income (loss) from operations	7,364	19,127	21,797	25,581
Other [Abstract]
Income (loss) from unconsolidated entities	1,265	963	2,018	34,711
Other income - net	1,019	3,022	14,250	4,066
Intercompany interest income	1,475	1,058	2,980	2,081
Interest Expense	(393)	(418)	(964)	(786)
Income from subsidiaries
Income (loss) before income taxes	10,730	23,752	40,081	65,653
Income tax provision	2,914	(2,527)	10,549	9,335
Net income (loss)	7,816	26,279	29,532	56,318
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	7,816	26,279	29,532	56,318
Eliminations [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	(45,752)	(46,334)	(90,527)	(90,334)
Cost of revenues	(17,989)	(14,443)	(33,765)	(32,258)
Selling, general and administrative	(24,867)	(25,359)	(52,422)	(51,202)
Total		(39,802)		(83,460)
Income (loss) from operations	(2,896)	(6,532)	(4,340)	(6,874)
Other [Abstract]
Income (loss) from unconsolidated entities
Other income - net	3,508	5,974	5,641	8,042
Intercompany interest income	(34,701)	(37,955)	(70,854)	(71,673)
Interest Expense	34,089	37,197	69,553	70,443
Income from subsidiaries	(186,990)	(176,514)	(368,177)	(350,031)
Income (loss) before income taxes	(186,990)	(177,830)	(368,177)	(350,093)
Income tax provision	(49,773)	(50,444)	(96,904)	(49,777)
Net income (loss)	(137,217)	(127,386)	(271,273)	(300,316)
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	(137,217)	(127,386)	(271,273)	(300,316)
Home Building [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	1,712,057	1,599,199	3,031,365	2,774,667
Cost of revenues	1,374,347	1,298,157	2,416,592	2,232,637
Home Building [Member] | Toll Brothers Inc. [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues
Cost of revenues
Home Building [Member] | Subsidiary Issuer [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues
Cost of revenues
Home Building [Member] | Guarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	1,675,155		2,967,351
Cost of revenues	1,344,891		2,365,786
Home Building [Member] | Nonguarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	36,902		64,014
Cost of revenues	29,616		50,965
Home Building [Member] | Eliminations [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues
Cost of revenues	(160)		(159)
Land [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	4,037	0	47,910	0
Cost of revenues	2,921	$ 0	37,174	$ 0
Land [Member] | Toll Brothers Inc. [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues
Cost of revenues
Land [Member] | Subsidiary Issuer [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues
Cost of revenues
Land [Member] | Guarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	15,460		30,793
Cost of revenues	3,841		7,979
Land [Member] | Nonguarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	34,329		107,644
Cost of revenues	16,909		62,801
Land [Member] | Eliminations [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	(45,752)		(90,527)
Cost of revenues	$ (17,829)		$ (33,606)