Supplemental Guarantor Information (Level 4 BS) (Details 1) - USD ($) $ in Thousands	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
ASSETS
Cash and cash equivalents	$ 1,182,195	$ 712,829	$ 633,715	$ 918,993
Inventory	7,598,219	7,281,453
Property, construction and office equipment, net	193,281	189,547
Receivables, prepaid expenses, and other assets	550,778	544,699
Mortgage loans held for sale	170,731	132,922
Customer deposits held in escrow	117,573	102,017
Investments in unconsolidated entities	431,813	481,758
Investments in and Advances to Affiliates, Amount of Equity	0	0
Total assets	10,244,590	9,445,225
Liabilities:
Loans payable	686,801	637,416
Senior Notes	2,861,375	2,462,463
Mortgage company loan facility	150,000	120,145
Customer deposits	410,864	396,026
Accounts payable	362,098	275,223
Accrued expenses	973,581	959,353
Advances from Affiliiate	0	0
Income taxes payable	30,959	57,509
Total liabilities	5,475,678	4,908,135
Stockholders’ equity:
Common stock	1,779	1,779
Additional paid-in capital	727,053	720,115
Retained earnings	5,161,551	4,474,064
Treasury stock, at cost -- 31,774 shares and 20,732 shares at October 31, 2018 and October 31, 2017, respectively	(1,130,878)	(662,854)
Accumulated other comprehensive loss	694	(1,910)	(3,336)	(2,509)
Total stockholders' equity	4,760,199	4,531,194
Noncontrolling interest	8,713	5,896
Total equity	4,768,912	4,537,090	4,235,202	4,228,079
Total liabilities and stockholders' equity	10,244,590	9,445,225
Eliminations [Member]
ASSETS
Cash and cash equivalents	0	0	0	0
Inventory
Property, construction and office equipment, net
Receivables, prepaid expenses, and other assets	(133,080)	(74,074)
Mortgage loans held for sale
Customer deposits held in escrow
Investments in unconsolidated entities
Investments in and Advances to Affiliates, Amount of Equity	(7,926,798)	(7,322,416)
Total assets	(8,059,878)	(7,396,490)
Liabilities:
Loans payable
Senior Notes
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	(127,266)	(79,341)
Advances from Affiliiate	(2,027,236)	(2,244,861)
Income taxes payable
Total liabilities	(2,154,502)	(2,324,202)
Stockholders’ equity:
Common stock	(3,054)	(3,054)
Additional paid-in capital	(143,134)	(143,134)
Retained earnings	(5,759,188)	(4,926,100)
Treasury stock, at cost -- 31,774 shares and 20,732 shares at October 31, 2018 and October 31, 2017, respectively
Accumulated other comprehensive loss
Total stockholders' equity	(5,905,376)	(5,072,288)
Noncontrolling interest
Total equity	(5,905,376)	(5,072,288)
Total liabilities and stockholders' equity	(8,059,878)	(7,396,490)
Toll Brothers Inc. [Member]
ASSETS
Cash and cash equivalents	0	0	0	0
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 Affiliates, Amount of Equity	4,791,629	4,589,228
Total assets	4,791,629	4,589,228
Liabilities:
Loans payable
Senior Notes
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	471	141
Advances from Affiliiate
Income taxes payable	30,959	57,893
Total liabilities	31,430	58,034
Stockholders’ equity:
Common stock	1,779	1,779
Additional paid-in capital	727,053	720,115
Retained earnings	5,161,551	4,474,064
Treasury stock, at cost -- 31,774 shares and 20,732 shares at October 31, 2018 and October 31, 2017, respectively	(1,130,878)	(662,854)
Accumulated other comprehensive loss	694	(1,910)
Total stockholders' equity	4,760,199	4,531,194
Noncontrolling interest
Total equity	4,760,199	4,531,194
Total liabilities and stockholders' equity	4,791,629	4,589,228
Subsidiary Issuer [Member]
ASSETS
Cash and cash equivalents	0	0	0	0
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 Affiliates, Amount of Equity	2,916,557	2,514,649
Total assets	2,916,557	2,514,649
Liabilities:
Loans payable
Senior Notes	2,861,375	2,462,463
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	37,341	34,345
Advances from Affiliiate
Income taxes payable
Total liabilities	2,898,716	2,496,808
Stockholders’ equity:
Common stock
Additional paid-in capital	49,400	49,400
Retained earnings	(31,559)	(31,559)
Treasury stock, at cost -- 31,774 shares and 20,732 shares at October 31, 2018 and October 31, 2017, respectively
Accumulated other comprehensive loss
Total stockholders' equity	17,841	17,841
Noncontrolling interest
Total equity	17,841	17,841
Total liabilities and stockholders' equity	2,916,557	2,514,649
Guarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	1,011,863	533,204	583,440	783,599
Inventory	7,493,205	7,017,331
Property, construction and office equipment, net	169,265	165,464
Receivables, prepaid expenses, and other assets	291,299	321,092
Mortgage loans held for sale
Customer deposits held in escrow	116,332	96,956
Investments in unconsolidated entities	44,329	66,897
Investments in and Advances to Affiliates, Amount of Equity	91,740	91,740
Total assets	9,218,033	8,292,684
Liabilities:
Loans payable	686,801	637,416
Senior Notes
Mortgage company loan facility
Customer deposits	405,318	377,083
Accounts payable	361,655	271,617
Accrued expenses	600,907	563,577
Advances from Affiliiate	1,551,196	1,584,957
Income taxes payable
Total liabilities	3,605,877	3,434,650
Stockholders’ equity:
Common stock	48	48
Additional paid-in capital
Retained earnings	5,612,108	4,857,986
Treasury stock, at cost -- 31,774 shares and 20,732 shares at October 31, 2018 and October 31, 2017, respectively
Accumulated other comprehensive loss
Total stockholders' equity	5,612,156	4,858,034
Noncontrolling interest
Total equity	5,612,156	4,858,034
Total liabilities and stockholders' equity	9,218,033	8,292,684
Non-Guarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	170,332	179,625	$ 50,275	$ 135,394
Inventory	105,014	264,122
Property, construction and office equipment, net	24,016	24,083
Receivables, prepaid expenses, and other assets	392,559	297,681
Mortgage loans held for sale	170,731	132,922
Customer deposits held in escrow	1,241	5,061
Investments in unconsolidated entities	387,484	414,861
Investments in and Advances to Affiliates, Amount of Equity	126,872	126,799
Total assets	1,378,249	1,445,154
Liabilities:
Loans payable
Senior Notes
Mortgage company loan facility	150,000	120,145
Customer deposits	5,546	18,943
Accounts payable	443	3,606
Accrued expenses	462,128	440,631
Advances from Affiliiate	476,040	659,904
Income taxes payable		(384)
Total liabilities	1,094,157	1,242,845
Stockholders’ equity:
Common stock	3,006	3,006
Additional paid-in capital	93,734	93,734
Retained earnings	178,639	99,673
Treasury stock, at cost -- 31,774 shares and 20,732 shares at October 31, 2018 and October 31, 2017, respectively
Accumulated other comprehensive loss
Total stockholders' equity	275,379	196,413
Noncontrolling interest	8,713	5,896
Total equity	284,092	202,309
Total liabilities and stockholders' equity	$ 1,378,249	$ 1,445,154