Supplemental Guarantor Information (Level 4 BS) (Details 1) - USD ($) $ in Thousands	Jan. 31, 2018	Oct. 31, 2017	Jan. 31, 2017	Oct. 31, 2016
ASSETS
Cash and cash equivalents	$ 508,277	$ 712,829	$ 373,469	$ 633,715
Restricted cash and investments	2,459	2,482
Inventory	7,713,796	7,281,453
Property, construction and office equipment, net	186,159	189,547
Receivables, prepaid expenses and other assets	559,990	542,217
Mortgage loans held for sale	70,488	132,922
Customer deposits held in escrow	119,418	102,017
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	449,748	481,758
Investments in and advances to consolidated entities	0	0
Deferred tax assets, net of valuation allowances	7,564
Total assets	9,617,899	9,445,225
Liabilities:
Loans payable	631,791	637,416
Senior notes	2,859,689	2,462,463
Mortgage company loan facility	38,344	120,145
Customer deposits	421,565	396,026
Accounts payable	287,392	275,223
Accrued expenses	914,228	959,353
Advances from Affiliiate	0	0
Income taxes payable	0	57,509
Total liabilities	5,153,009	4,908,135
Equity:
Common stock	1,779	1,779
Additional paid-in capital	709,800	720,115
Retained earnings	4,595,233	4,474,064
Treasury stock, at cost	(845,668)	(662,854)
Accumulated other comprehensive loss	(2,150)	(1,910)
Total stockholders' equity	4,458,994	4,531,194
Noncontrolling interest	5,896	5,896
Total equity	4,464,890	4,537,090
Total liabilities and stockholders' equity	9,617,899	9,445,225
Toll Brothers Inc. [Member]
ASSETS
Cash and cash equivalents	0	0	0	0
Restricted cash and investments
Inventory
Property, construction and office equipment, net
Receivables, prepaid expenses and other assets	1,064
Mortgage loans held for sale
Customer deposits held in escrow
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
Investments in and advances to consolidated entities	4,460,274	4,589,228
Deferred tax assets, net of valuation allowances	7,564
Total assets	4,468,902	4,589,228
Liabilities:
Loans payable
Senior notes
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	9,908	141
Advances from Affiliiate
Income taxes payable		57,893
Total liabilities	9,908	58,034
Equity:
Common stock	1,779	1,779
Additional paid-in capital	709,800	720,115
Retained earnings	4,595,233	4,474,064
Treasury stock, at cost	(845,668)	(662,854)
Accumulated other comprehensive loss	(2,150)	(1,910)
Total stockholders' equity	4,458,994	4,531,194
Noncontrolling interest
Total equity	4,458,994	4,531,194
Total liabilities and stockholders' equity	4,468,902	4,589,228
Subsidiary Issuer [Member]
ASSETS
Cash and cash equivalents	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 and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
Investments in and advances to consolidated entities	2,913,133	2,514,649
Deferred tax assets, net of valuation allowances
Total assets	2,913,133	2,514,649
Liabilities:
Loans payable
Senior notes	2,859,689	2,462,463
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	35,603	34,345
Advances from Affiliiate
Income taxes payable
Total liabilities	2,895,292	2,496,808
Equity:
Common stock
Additional paid-in capital	49,400	49,400
Retained earnings	(31,559)	(31,559)
Treasury stock, at cost
Accumulated other comprehensive loss
Total stockholders' equity	17,841	17,841
Noncontrolling interest
Total equity	17,841	17,841
Total liabilities and stockholders' equity	2,913,133	2,514,649
Guarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	344,828	533,204	280,504	583,440
Restricted cash and investments	1,500	1,500
Inventory	7,487,983	7,017,331
Property, construction and office equipment, net	162,349	165,464
Receivables, prepaid expenses and other assets	320,275	319,592
Mortgage loans held for sale
Customer deposits held in escrow	111,782	96,956
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	53,953	66,897
Investments in and advances to consolidated entities	91,740	91,740
Deferred tax assets, net of valuation allowances
Total assets	8,574,410	8,292,684
Liabilities:
Loans payable	631,791	637,416
Senior notes
Mortgage company loan facility
Customer deposits	404,880	377,083
Accounts payable	284,423	271,617
Accrued expenses	521,213	563,577
Advances from Affiliiate	1,731,178	1,584,957
Income taxes payable
Total liabilities	3,573,485	3,434,650
Equity:
Common stock	48	48
Additional paid-in capital
Retained earnings	5,000,877	4,857,986
Treasury stock, at cost
Accumulated other comprehensive loss
Total stockholders' equity	5,000,925	4,858,034
Noncontrolling interest
Total equity	5,000,925	4,858,034
Total liabilities and stockholders' equity	8,574,410	8,292,684
Nonguarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	163,449	179,625	92,965	50,275
Restricted cash and investments	959	982
Inventory	225,813	264,122
Property, construction and office equipment, net	23,810	24,083
Receivables, prepaid expenses and other assets	327,295	296,699
Mortgage loans held for sale	70,488	132,922
Customer deposits held in escrow	7,636	5,061
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	395,795	414,861
Investments in and advances to consolidated entities	126,964	126,799
Deferred tax assets, net of valuation allowances
Total assets	1,342,209	1,445,154
Liabilities:
Loans payable
Senior notes
Mortgage company loan facility	38,344	120,145
Customer deposits	16,685	18,943
Accounts payable	2,969	3,606
Accrued expenses	444,437	440,631
Advances from Affiliiate	607,425	659,904
Income taxes payable		(384)
Total liabilities	1,109,860	1,242,845
Equity:
Common stock	3,006	3,006
Additional paid-in capital	93,734	93,734
Retained earnings	129,713	99,673
Treasury stock, at cost
Accumulated other comprehensive loss
Total stockholders' equity	226,453	196,413
Noncontrolling interest	5,896	5,896
Total equity	232,349	202,309
Total liabilities and stockholders' equity	1,342,209	1,445,154
Eliminations [Member]
ASSETS
Cash and cash equivalents	0	0	$ 0	$ 0
Restricted cash and investments
Inventory
Property, construction and office equipment, net
Receivables, prepaid expenses and other assets	(88,644)	(74,074)
Mortgage loans held for sale
Customer deposits held in escrow
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
Investments in and advances to consolidated entities	(7,592,111)	(7,322,416)
Deferred tax assets, net of valuation allowances
Total assets	(7,680,755)	(7,396,490)
Liabilities:
Loans payable
Senior notes
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	(96,933)	(79,341)
Advances from Affiliiate	(2,338,603)	(2,244,861)
Income taxes payable
Total liabilities	(2,435,536)	(2,324,202)
Equity:
Common stock	(3,054)	(3,054)
Additional paid-in capital	(143,134)	(143,134)
Retained earnings	(5,099,031)	(4,926,100)
Treasury stock, at cost
Accumulated other comprehensive loss
Total stockholders' equity	(5,245,219)	(5,072,288)
Noncontrolling interest
Total equity	(5,245,219)	(5,072,288)
Total liabilities and stockholders' equity	$ (7,680,755)	$ (7,396,490)