Supplemental Guarantor Information (Level 4 IS) (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Supplemental Condensed Consolidating Statement of Operations
Revenues	$ 1,651,489	$ 1,765,691	$ 4,531,992	$ 4,844,966
Cost of revenues	1,341,195	1,407,987	3,710,484	3,861,753
Selling, general and administrative	160,649	186,709	531,819	527,318
Income (loss) from operations	149,645	170,995	289,689	455,895
Other [Abstract]
Income (loss) from equity method investments	(2,566)	7,200	5,304	17,759
Other income - net	4,786	8,721	24,917	40,867
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	151,865	186,916	319,910	514,521
Income tax provision	37,104	40,598	72,603	126,829
Net income (loss)	114,761	146,318	247,307	387,692
Other Comprehensive Income (Loss), Net of Tax	279	56	835	168
Comprehensive Income (loss), Net of Tax, Attributable to Parent	115,040	146,374	248,142	387,860
Toll Brothers Inc. [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	0	0	0	0
Cost of revenues	0	0	0	0
Selling, general and administrative	100		200	491
Income (loss) from operations	(100)	0	(200)	(491)
Other [Abstract]
Income (loss) from equity method investments
Other income - net
Intercompany interest income
Interest Expense
Income from subsidiaries	151,965	186,916	320,111	515,012
Income (loss) before income taxes	151,865	186,916	319,911	514,521
Income tax provision	37,104	40,598	72,603	126,829
Net income (loss)	114,761	146,318	247,308	387,692
Other Comprehensive Income (Loss), Net of Tax	279	56	835	168
Comprehensive Income (loss), Net of Tax, Attributable to Parent	115,040	146,374	248,143	387,860
Subsidiary Issuer [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	0	0	0	0
Cost of revenues	0	0	0	0
Selling, general and administrative	17	627	53	2,022
Income (loss) from operations	(17)	(627)	(53)	(2,022)
Other [Abstract]
Income (loss) from equity method investments
Other income - net
Intercompany interest income	32,438	32,849	98,080	99,853
Interest Expense	(32,421)	(32,222)	(98,027)	(97,831)
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	1,640,329	1,762,030	4,483,228	4,760,174
Cost of revenues	1,329,151	1,394,379	3,657,142	3,768,144
Selling, general and administrative	169,550	197,722	554,591	552,772
Income (loss) from operations	141,628	169,929	271,495	439,258
Other [Abstract]
Income (loss) from equity method investments	(126)	245	14,589	8,786
Other income - net	2,651	3,731	16,719	15,986
Intercompany interest income	1,609	882	4,539	1,752
Interest Expense	(1,327)	(1,802)	(4,129)	(4,782)
Income from subsidiaries	7,529	13,931	22,898	54,012
Income (loss) before income taxes	151,964	186,916	326,111	515,012
Income tax provision	37,222	40,596	74,010	126,951
Net income (loss)	114,742	146,320	252,101	388,061
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	114,742	146,320	252,101	388,061
Nonguarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	58,423	54,128	185,988	225,786
Cost of revenues	35,712	30,037	118,085	143,803
Selling, general and administrative	12,837	19,251	45,828	55,346
Income (loss) from operations	9,874	4,840	22,075	26,637
Other [Abstract]
Income (loss) from equity method investments	(2,440)	6,955	(9,285)	8,973
Other income - net	682	1,271	11,158	15,521
Intercompany interest income	1,218	1,802	4,020	4,782
Interest Expense	(1,805)	(937)	(5,071)	(1,901)
Income from subsidiaries
Income (loss) before income taxes	7,529	13,931	22,897	54,012
Income tax provision	1,951	2,764	5,197	13,313
Net income (loss)	5,578	11,167	17,700	40,699
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	5,578	11,167	17,700	40,699
Eliminations [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	(47,263)	(50,467)	(137,224)	(140,994)
Cost of revenues	(23,668)	(16,429)	(64,743)	(50,194)
Selling, general and administrative	(21,855)	(30,891)	(68,853)	(83,313)
Income (loss) from operations	(1,740)	(3,147)	(3,628)	(7,487)
Other [Abstract]
Income (loss) from equity method investments
Other income - net	1,453	3,719	(2,960)	9,360
Intercompany interest income	(35,265)	(35,533)	(106,639)	(106,387)
Interest Expense	35,553	34,961	107,227	104,514
Income from subsidiaries	(159,494)	(200,847)	(343,009)	(569,024)
Income (loss) before income taxes	(159,493)	(200,847)	(349,009)	(569,024)
Income tax provision	(39,173)	(43,360)	(79,207)	(140,264)
Net income (loss)	(120,320)	(157,487)	(269,802)	(428,760)
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	(120,320)	(157,487)	(269,802)	(428,760)
Home Building [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	1,627,812	1,756,970	4,441,383	4,788,335
Cost of revenues	1,318,936	1,401,755	3,629,525	3,818,347
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	1,616,151	1,740,111	4,415,086	4,707,462
Cost of revenues	1,311,978	1,387,423	3,613,839	3,753,209
Home Building [Member] | Nonguarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	11,661	16,859	26,297	80,873
Cost of revenues	9,431	13,432	20,717	64,397
Home Building [Member] | Eliminations [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues
Cost of revenues	(2,473)	900	(5,031)	741
Land [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	23,677	8,721	90,609	56,631
Cost of revenues	22,259	6,232	80,959	43,406
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	24,178	21,919	68,142	52,712
Cost of revenues	17,173	6,956	43,303	14,935
Land [Member] | Nonguarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	46,762	37,269	159,691	144,913
Cost of revenues	26,281	16,605	97,368	79,406
Land [Member] | Eliminations [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	(47,263)	(50,467)	(137,224)	(140,994)
Cost of revenues	$ (21,195)	$ (17,329)	$ (59,712)	$ (50,935)