Supplemental Guarantor Information (Level 4 IS) (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018
Supplemental Condensed Consolidating Statement of Operations
Revenues	$ 1,765,691	$ 1,913,353	$ 4,844,966	$ 4,688,020
Cost of revenues	1,407,987	1,509,619	3,861,753	3,742,256
Selling, general and administrative	186,709	174,071	527,318	497,990
Total		1,683,690		4,240,246
Income (loss) from operations	170,995	229,663	455,895	447,774
Other [Abstract]
Income (loss) from unconsolidated entities	7,200	12,469	17,759	53,913
Other income - net	8,721	10,965	40,867	35,756
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	186,916	253,097	514,521	537,443
Income tax provision	40,598	59,839	126,829	100,268
Net income (loss)	146,318	193,258	387,692	437,175
Other Comprehensive Income (Loss), Net of Tax	56	170	168	512
Comprehensive Income (loss), Net of Tax, Attributable to Parent	146,374	193,428	387,860	437,687
Toll Brothers Inc. [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	0		0
Cost of revenues	0		0
Selling, general and administrative		25	491	57
Total		25		57
Income (loss) from operations	0	(25)	(491)	(57)
Other [Abstract]
Income (loss) from unconsolidated entities
Other income - net
Intercompany interest income
Interest Expense
Income from subsidiaries	186,916	253,122	515,012	537,500
Income (loss) before income taxes	186,916	253,097	514,521	537,443
Income tax provision	40,598	59,839	126,829	100,268
Net income (loss)	146,318	193,258	387,692	437,175
Other Comprehensive Income (Loss), Net of Tax	56	170	168	512
Comprehensive Income (loss), Net of Tax, Attributable to Parent	146,374	193,428	387,860	437,687
Subsidiary Issuer [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	0		0
Cost of revenues	0		0
Selling, general and administrative	627	770	2,022	2,397
Total		770		2,397
Income (loss) from operations	(627)	(770)	(2,022)	(2,397)
Other [Abstract]
Income (loss) from unconsolidated entities
Other income - net
Intercompany interest income	32,849	36,395	99,853	105,598
Interest Expense	(32,222)	(35,625)	(97,831)	(103,201)
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	1,762,030	1,865,613	4,760,174	4,492,956
Cost of revenues	1,394,379	1,468,135	3,768,144	3,561,287
Selling, general and administrative	197,722	181,793	552,772	514,921
Total		1,649,928		4,076,208
Income (loss) from operations	169,929	215,685	439,258	416,748
Other [Abstract]
Income (loss) from unconsolidated entities	245	10,010	8,786	16,743
Other income - net	3,731	6,605	15,986	19,288
Intercompany interest income	882	663	1,752	1,052
Interest Expense	(1,802)	(1,154)	(4,782)	(3,235)
Income from subsidiaries	13,931	22,627	54,012	88,280
Income (loss) before income taxes	186,916	254,436	515,012	538,876
Income tax provision	40,596	60,096	126,951	100,538
Net income (loss)	146,320	194,340	388,061	438,338
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	146,320	194,340	388,061	438,338
Nonguarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	54,128	91,975	225,786	329,633
Cost of revenues	30,037	52,247	143,803	223,990
Selling, general and administrative	19,251	21,209	55,346	61,543
Total		73,456		285,533
Income (loss) from operations	4,840	18,519	26,637	44,100
Other [Abstract]
Income (loss) from unconsolidated entities	6,955	2,459	8,973	37,170
Other income - net	1,271	1,186	15,521	5,252
Intercompany interest income	1,802	1,154	4,782	3,235
Interest Expense	(937)	(691)	(1,901)	(1,477)
Income from subsidiaries
Income (loss) before income taxes	13,931	22,627	54,012	88,280
Income tax provision	2,764	7,135	13,313	16,470
Net income (loss)	11,167	15,492	40,699	71,810
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	11,167	15,492	40,699	71,810
Eliminations [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	(50,467)	(44,235)	(140,994)	(134,569)
Cost of revenues	(16,429)	(10,763)	(50,194)	(43,021)
Selling, general and administrative	(30,891)	(29,726)	(83,313)	(80,928)
Total		(40,489)		(123,949)
Income (loss) from operations	(3,147)	(3,746)	(7,487)	(10,620)
Other [Abstract]
Income (loss) from unconsolidated entities
Other income - net	3,719	3,174	9,360	11,216
Intercompany interest income	(35,533)	(38,212)	(106,387)	(109,885)
Interest Expense	34,961	37,470	104,514	107,913
Income from subsidiaries	(200,847)	(275,749)	(569,024)	(625,780)
Income (loss) before income taxes	(200,847)	(277,063)	(569,024)	(627,156)
Income tax provision	(43,360)	(67,231)	(140,264)	(117,008)
Net income (loss)	(157,487)	(209,832)	(428,760)	(510,148)
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	(157,487)	(209,832)	(428,760)	(510,148)
Home Building [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	1,756,970	1,913,353	4,788,335	4,688,020
Cost of revenues	1,401,755	1,509,619	3,818,347	3,742,256
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	1,740,111		4,707,462
Cost of revenues	1,387,423		3,753,209
Home Building [Member] | Nonguarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	16,859		80,873
Cost of revenues	13,432		64,397
Home Building [Member] | Eliminations [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues
Cost of revenues	900		741
Land [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	8,721	0	56,631	0
Cost of revenues	6,232	$ 0	43,406	$ 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	21,919		52,712
Cost of revenues	6,956		14,935
Land [Member] | Nonguarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	37,269		144,913
Cost of revenues	16,605		79,406
Land [Member] | Eliminations [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	(50,467)		(140,994)
Cost of revenues	$ (17,329)		$ (50,935)