Supplemental Guarantor Information (Level 4 IS) (Details 2) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Oct. 31, 2016
Supplemental Condensed Consolidating Statement of Operations
Revenues	$ 920,730	$ 928,566	$ 5,169,508
Cost of revenues	733,002	712,311	4,144,065
Selling, general and administrative	137,095	121,796	535,382
Total	870,097	834,107	4,679,447
Income (loss) from operations	50,633	94,459	490,061
Other [Abstract]
Income (loss) from unconsolidated entities	46,445	8,638	40,748
Other income - net	12,703	13,720	58,218
Intercompany interest income	0	0	0
Interest Expense	0	0	0
Income from subsidiaries	0	0	0
Income (loss) before income taxes	109,781	116,817	589,027
Income tax provision (benefit)	39,365	43,637	206,932
Net income (loss)	70,416	73,180	382,095
Other Comprehensive Income (Loss), Net of Tax	169	(261)	(827)
Comprehensive Income (loss), Net of Tax, Attributable to Parent	70,585	72,919	381,268
Toll Brothers Inc. [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues
Cost of revenues
Selling, general and administrative		12	75
Total	0	12	75
Income (loss) from operations	0	(12)	(75)
Other [Abstract]
Income (loss) from unconsolidated entities
Other income - net	2,393	2,391	9,501
Intercompany interest income
Interest Expense
Income from subsidiaries	107,388	114,438	579,601
Income (loss) before income taxes	109,781	116,817	589,027
Income tax provision (benefit)	39,365	43,637	206,932
Net income (loss)	70,416	73,180	382,095
Other Comprehensive Income (Loss), Net of Tax	169	(288)	(858)
Comprehensive Income (loss), Net of Tax, Attributable to Parent	70,585	72,892	381,237
Subsidiary Issuer [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues
Cost of revenues
Selling, general and administrative	968	969	3,809
Total	968	969	3,809
Income (loss) from operations	(968)	(969)	(3,809)
Other [Abstract]
Income (loss) from unconsolidated entities
Other income - net
Intercompany interest income	36,496	36,497	145,828
Interest Expense	(37,895)	(37,895)	(151,410)
Income from subsidiaries
Income (loss) before income taxes	(2,367)	(2,367)	(9,391)
Income tax provision (benefit)	(849)	(912)	(3,299)
Net income (loss)	(1,518)	(1,455)	(6,092)
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	(1,518)	(1,455)	(6,092)
Guarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	915,823	784,596	4,984,356
Cost of revenues	724,257	624,801	3,919,729
Selling, general and administrative	143,881	125,905	558,822
Total	868,138	750,706	4,478,551
Income (loss) from operations	47,685	33,890	505,805
Other [Abstract]
Income (loss) from unconsolidated entities	5,144	2,997	16,913
Other income - net	7,251	8,169	27,873
Intercompany interest income
Interest Expense
Income from subsidiaries	42,048	69,382	29,010
Income (loss) before income taxes	102,128	114,438	579,601
Income tax provision (benefit)	36,621	44,104	203,614
Net income (loss)	65,507	70,334	375,987
Other Comprehensive Income (Loss), Net of Tax		27	31
Comprehensive Income (loss), Net of Tax, Attributable to Parent	65,507	70,361	376,018
Nonguarantor Subsidiaries [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	45,696	170,223	361,685
Cost of revenues	29,471	90,087	288,044
Selling, general and administrative	16,948	17,973	74,328
Total	46,419	108,060	362,372
Income (loss) from operations	(723)	62,163	(687)
Other [Abstract]
Income (loss) from unconsolidated entities	41,301	5,641	23,835
Other income - net	4,500	4,193	17,456
Intercompany interest income
Interest Expense	(663)	(248)	(2,203)
Income from subsidiaries
Income (loss) before income taxes	44,415	71,749	38,401
Income tax provision (benefit)	15,926	27,652	13,490
Net income (loss)	28,489	44,097	24,911
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	28,489	44,097	24,911
Eliminations [Member]
Supplemental Condensed Consolidating Statement of Operations
Revenues	(40,789)	(26,253)	(176,533)
Cost of revenues	(20,726)	(2,577)	(63,708)
Selling, general and administrative	(24,702)	(23,063)	(101,652)
Total	(45,428)	(25,640)	(165,360)
Income (loss) from operations	4,639	(613)	(11,173)
Other [Abstract]
Income (loss) from unconsolidated entities
Other income - net	(1,441)	(1,033)	3,388
Intercompany interest income	(36,496)	(36,497)	(145,828)
Interest Expense	38,558	38,143	153,613
Income from subsidiaries	(149,436)	(183,820)	(608,611)
Income (loss) before income taxes	(144,176)	(183,820)	(608,611)
Income tax provision (benefit)	(51,698)	(70,844)	(213,805)
Net income (loss)	(92,478)	(112,976)	(394,806)
Other Comprehensive Income (Loss), Net of Tax
Comprehensive Income (loss), Net of Tax, Attributable to Parent	$ (92,478)	$ (112,976)	$ (394,806)