Supplemental Guarantor Information (Level 4 BS) (Details 1) - USD ($) $ in Thousands	Jul. 31, 2017	Oct. 31, 2016	Jul. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
ASSETS
Cash and cash equivalents	$ 946,195	$ 633,715	$ 351,854	$ 918,993	$ 918,993
Restricted cash and investments	781	31,291
Inventory	7,633,568	7,353,967
Property, construction and office equipment, net	179,476	169,576
Receivables, prepaid expenses and other assets	536,524	582,758
Mortgage loans held for sale	89,419	248,601
Customer deposits held in escrow	93,851	53,057
Investments in unconsolidated entities	514,265	496,411
Investments in and advances to consolidated entities	0	0
Deferred tax assets, net of valuation allowances	134,857	167,413
Total assets	10,128,936	9,736,789
Liabilities:
Loans payable	619,574	871,079
Senior notes	3,148,905	2,694,372
Mortgage company loan facility	57,921	210,000
Customer deposits	414,145	309,099
Accounts payable	276,766	281,955
Accrued expenses	956,121	1,072,300
Advances from Affiliiate	0	0
Income taxes payable	116,883	62,782
Total liabilities	5,590,315	5,501,587
Equity:
Common stock	1,779	1,779
Additional paid-in capital	713,624	728,464
Retained earnings	4,294,808	3,977,297
Treasury stock, at cost	(474,665)	(474,912)
Accumulated other comprehensive loss	(2,832)	(3,336)
Total stockholders' equity	4,532,714	4,229,292
Noncontrolling interest	5,907	5,910
Total equity	4,538,621	4,235,202
Total liabilities and stockholders' equity	10,128,936	9,736,789
Toll Brothers Inc. [Member]
ASSETS
Cash and cash equivalents	0	0	0	0	0
Restricted cash and investments		11,708
Inventory
Property, construction and office equipment, net
Receivables, prepaid expenses and other assets		77
Mortgage loans held for sale
Customer deposits held in escrow
Investments in unconsolidated entities
Investments in and advances to consolidated entities	4,514,891	4,112,876
Deferred tax assets, net of valuation allowances	134,857	167,413
Total assets	4,649,748	4,292,074
Liabilities:
Loans payable
Senior notes
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	151
Advances from Affiliiate
Income taxes payable	116,883	62,782
Total liabilities	117,034	62,782
Equity:
Common stock	1,779	1,779
Additional paid-in capital	713,624	728,464
Retained earnings	4,294,808	3,977,297
Treasury stock, at cost	(474,665)	(474,912)
Accumulated other comprehensive loss	(2,832)	(3,336)
Total stockholders' equity	4,532,714	4,229,292
Noncontrolling interest
Total equity	4,532,714	4,229,292
Total liabilities and stockholders' equity	4,649,748	4,292,074
Subsidiary Issuer [Member]
ASSETS
Cash and cash equivalents	0	0	0	0	0
Restricted cash and investments
Inventory
Property, construction and office equipment, net
Receivables, prepaid expenses and other assets
Mortgage loans held for sale
Customer deposits held in escrow
Investments in unconsolidated entities
Investments in and advances to consolidated entities	3,211,923	2,741,160
Deferred tax assets, net of valuation allowances
Total assets	3,211,923	2,741,160
Liabilities:
Loans payable
Senior notes	3,145,380	2,683,823
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	46,233	32,559
Advances from Affiliiate
Income taxes payable
Total liabilities	3,191,613	2,716,382
Equity:
Common stock
Additional paid-in capital	49,400	49,400
Retained earnings	(29,090)	(24,622)
Treasury stock, at cost
Accumulated other comprehensive loss
Total stockholders' equity	20,310	24,778
Noncontrolling interest
Total equity	20,310	24,778
Total liabilities and stockholders' equity	3,211,923	2,741,160
Guarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	784,527	583,440	302,234	783,599	783,599
Restricted cash and investments
Inventory	7,378,098	6,896,205
Property, construction and office equipment, net	164,156	153,663
Receivables, prepaid expenses and other assets	354,597	319,319
Mortgage loans held for sale
Customer deposits held in escrow	91,378	50,079
Investments in unconsolidated entities	66,405	101,999
Investments in and advances to consolidated entities	91,740	20,519
Deferred tax assets, net of valuation allowances
Total assets	8,930,901	8,125,224
Liabilities:
Loans payable	612,407	871,079
Senior notes
Mortgage company loan facility
Customer deposits	395,407	292,794
Accounts payable	274,350	280,107
Accrued expenses	593,862	610,958
Advances from Affiliiate	2,404,026	1,737,682
Income taxes payable
Total liabilities	4,280,052	3,792,620
Equity:
Common stock	48	48
Additional paid-in capital
Retained earnings	4,650,801	4,332,556
Treasury stock, at cost
Accumulated other comprehensive loss
Total stockholders' equity	4,650,849	4,332,604
Noncontrolling interest
Total equity	4,650,849	4,332,604
Total liabilities and stockholders' equity	8,930,901	8,125,224
Nonguarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	161,668	50,275	49,620	135,394	135,394
Restricted cash and investments	781	19,583
Inventory	255,470	457,806
Property, construction and office equipment, net	15,320	15,913
Receivables, prepaid expenses and other assets	252,406	299,978
Mortgage loans held for sale	89,419	248,601
Customer deposits held in escrow	2,473	2,978
Investments in unconsolidated entities	447,860	394,412
Investments in and advances to consolidated entities	128,433	90,671
Deferred tax assets, net of valuation allowances
Total assets	1,353,830	1,580,217
Liabilities:
Loans payable	7,167
Senior notes
Mortgage company loan facility	57,921	210,000
Customer deposits	18,738	16,305
Accounts payable	2,416	1,848
Accrued expenses	393,208	469,527
Advances from Affiliiate	685,740	799,082
Income taxes payable
Total liabilities	1,165,190	1,496,762
Equity:
Common stock	3,006	3,006
Additional paid-in capital	93,734	6,734
Retained earnings	85,993	67,805
Treasury stock, at cost
Accumulated other comprehensive loss
Total stockholders' equity	182,733	77,545
Noncontrolling interest	5,907	5,910
Total equity	188,640	83,455
Total liabilities and stockholders' equity	1,353,830	1,580,217
Eliminations [Member]
ASSETS
Cash and cash equivalents	0	0	$ 0	$ 0	$ 0
Restricted cash and investments
Inventory		(44)
Property, construction and office equipment, net
Receivables, prepaid expenses and other assets	(70,479)	(36,616)
Mortgage loans held for sale
Customer deposits held in escrow
Investments in unconsolidated entities
Investments in and advances to consolidated entities	(7,946,987)	(6,965,226)
Deferred tax assets, net of valuation allowances
Total assets	(8,017,466)	(7,001,886)
Liabilities:
Loans payable
Senior notes	3,525	10,549
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	(77,333)	(40,744)
Advances from Affiliiate	(3,089,766)	(2,536,764)
Income taxes payable
Total liabilities	(3,163,574)	(2,566,959)
Equity:
Common stock	(3,054)	(3,054)
Additional paid-in capital	(143,134)	(56,134)
Retained earnings	(4,707,704)	(4,375,739)
Treasury stock, at cost
Accumulated other comprehensive loss
Total stockholders' equity	(4,853,892)	(4,434,927)
Noncontrolling interest
Total equity	(4,853,892)	(4,434,927)
Total liabilities and stockholders' equity	$ (8,017,466)	$ (7,001,886)