Supplemental Guarantor Information (Level 4 BS) (Details 1) - USD ($) $ in Thousands	Apr. 30, 2018	Oct. 31, 2017	Apr. 30, 2017	Oct. 31, 2016
ASSETS
Cash and cash equivalents	$ 475,113	$ 712,829	$ 691,266	$ 633,715
Restricted cash and investments	1,161	2,482
Inventory	7,871,569	7,281,453
Property, construction and office equipment, net	185,676	189,547
Receivables, prepaid expenses and other assets	599,755	542,217
Mortgage loans held for sale	111,811	132,922
Customer deposits held in escrow	135,072	102,017
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	456,762	481,758
Investments in and advances to consolidated entities	0	0
Deferred tax assets, net of valuation allowances	6,807
Total assets	9,843,726	9,445,225
Liabilities:
Loans payable	649,299	637,416
Senior notes	2,860,290	2,462,463
Mortgage company loan facility	103,550	120,145
Customer deposits	469,586	396,026
Accounts payable	324,605	275,223
Accrued expenses	936,414	959,353
Advances from Affiliiate	0	0
Income taxes payable	13,386	57,509
Total liabilities	5,357,130	4,908,135
Equity:
Common stock	1,779	1,779
Additional paid-in capital	715,949	720,115
Retained earnings	4,690,272	4,474,064
Treasury stock, at cost	(925,317)	(662,854)
Accumulated other comprehensive loss	(1,980)	(1,910)
Total stockholders' equity	4,480,703	4,531,194
Noncontrolling interest	5,893	5,896
Total equity	4,486,596	4,537,090
Total liabilities and stockholders' equity	9,843,726	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
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	4,487,504	4,589,228
Deferred tax assets, net of valuation allowances	6,807
Total assets	4,494,311	4,589,228
Liabilities:
Loans payable
Senior notes
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	222	141
Advances from Affiliiate
Income taxes payable	13,386	57,893
Total liabilities	13,608	58,034
Equity:
Common stock	1,779	1,779
Additional paid-in capital	715,949	720,115
Retained earnings	4,690,272	4,474,064
Treasury stock, at cost	(925,317)	(662,854)
Accumulated other comprehensive loss	(1,980)	(1,910)
Total stockholders' equity	4,480,703	4,531,194
Noncontrolling interest
Total equity	4,480,703	4,531,194
Total liabilities and stockholders' equity	4,494,311	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	2,916,816	2,514,649
Deferred tax assets, net of valuation allowances
Total assets	2,916,816	2,514,649
Liabilities:
Loans payable
Senior notes	2,860,290	2,462,463
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	38,685	34,345
Advances from Affiliiate
Income taxes payable
Total liabilities	2,898,975	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	2,916,816	2,514,649
Guarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	284,320	533,204	602,081	583,440
Restricted cash and investments	281	1,500
Inventory	7,694,392	7,017,331
Property, construction and office equipment, net	161,885	165,464
Receivables, prepaid expenses and other assets	321,212	319,592
Mortgage loans held for sale
Customer deposits held in escrow	127,822	96,956
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	47,223	66,897
Investments in and advances to consolidated entities	155,315	91,740
Deferred tax assets, net of valuation allowances
Total assets	8,792,450	8,292,684
Liabilities:
Loans payable	649,299	637,416
Senior notes
Mortgage company loan facility
Customer deposits	455,002	377,083
Accounts payable	322,704	271,617
Accrued expenses	558,264	563,577
Advances from Affiliiate	1,705,147	1,584,957
Income taxes payable
Total liabilities	3,690,416	3,434,650
Equity:
Common stock	48	48
Additional paid-in capital
Retained earnings	5,101,986	4,857,986
Treasury stock, at cost
Accumulated other comprehensive loss
Total stockholders' equity	5,102,034	4,858,034
Noncontrolling interest
Total equity	5,102,034	4,858,034
Total liabilities and stockholders' equity	8,792,450	8,292,684
Nonguarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	190,793	179,625	89,185	50,275
Restricted cash and investments	880	982
Inventory	177,177	264,122
Property, construction and office equipment, net	23,791	24,083
Receivables, prepaid expenses and other assets	390,340	296,699
Mortgage loans held for sale	111,811	132,922
Customer deposits held in escrow	7,250	5,061
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	409,539	414,861
Investments in and advances to consolidated entities	127,177	126,799
Deferred tax assets, net of valuation allowances
Total assets	1,438,758	1,445,154
Liabilities:
Loans payable
Senior notes
Mortgage company loan facility	103,550	120,145
Customer deposits	14,584	18,943
Accounts payable	1,901	3,606
Accrued expenses	457,801	440,631
Advances from Affiliiate	602,297	659,904
Income taxes payable		(384)
Total liabilities	1,180,133	1,242,845
Equity:
Common stock	3,006	3,006
Additional paid-in capital	93,734	93,734
Retained earnings	155,992	99,673
Treasury stock, at cost
Accumulated other comprehensive loss
Total stockholders' equity	252,732	196,413
Noncontrolling interest	5,893	5,896
Total equity	258,625	202,309
Total liabilities and stockholders' equity	1,438,758	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	(111,797)	(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	(7,686,812)	(7,322,416)
Deferred tax assets, net of valuation allowances
Total assets	(7,798,609)	(7,396,490)
Liabilities:
Loans payable
Senior notes
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	(118,558)	(79,341)
Advances from Affiliiate	(2,307,444)	(2,244,861)
Income taxes payable
Total liabilities	(2,426,002)	(2,324,202)
Equity:
Common stock	(3,054)	(3,054)
Additional paid-in capital	(143,134)	(143,134)
Retained earnings	(5,226,419)	(4,926,100)
Treasury stock, at cost
Accumulated other comprehensive loss
Total stockholders' equity	(5,372,607)	(5,072,288)
Noncontrolling interest
Total equity	(5,372,607)	(5,072,288)
Total liabilities and stockholders' equity	$ (7,798,609)	$ (7,396,490)