Supplemental Guarantor Information (Level 4 BS) (Details 1) - USD ($) $ in Thousands	Jul. 31, 2019	Apr. 30, 2019	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Oct. 31, 2017
ASSETS
Cash and cash equivalents	$ 836,258		$ 1,182,195	$ 522,181
Inventory	7,995,076		7,598,219
Property, construction and office equipment, net	288,742		193,281
Receivables, prepaid expenses and other assets	720,178		550,778
Mortgage loans held for sale	169,251		170,731
Customer deposits held in escrow	88,043		117,573
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	354,569		431,813
Investments in and advances to consolidated entities	0		0
Total assets	10,452,117		10,244,590
Liabilities:
Loans payable	1,089,137		686,801
Senior notes	2,512,877		2,861,375
Mortgage company loan facility	150,000		150,000
Customer deposits	429,665		410,864
Accounts payable	344,665		362,098
Accrued expenses	895,940		973,581
Advances from Affiliiate	0		0
Income taxes payable	45,376		30,959
Total liabilities	5,467,660		5,475,678
Equity:
Common stock	1,779		1,779
Additional paid-in capital	724,411		727,053
Retained earnings	5,482,955		5,161,551
Treasury stock, at cost	(1,270,922)		(1,130,878)
Accumulated other comprehensive income	862		694
Total stockholders' equity	4,939,085		4,760,199
Noncontrolling interest	45,372		8,713
Total equity	4,984,457	$ 4,986,240	4,768,912	$ 4,537,380	$ 4,486,596	$ 4,537,090
Total liabilities and stockholders' equity	10,452,117		10,244,590
Toll Brothers Inc. [Member]
ASSETS
Cash and cash equivalents	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 and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
Investments in and advances to consolidated entities	5,003,121		4,791,629
Total assets	5,003,121		4,791,629
Liabilities:
Loans payable
Senior notes
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	674		471
Advances from Affiliiate
Income taxes payable	45,376		30,959
Total liabilities	46,050		31,430
Equity:
Common stock	1,779		1,779
Additional paid-in capital	724,411		727,053
Retained earnings	5,500,941		5,161,551
Treasury stock, at cost	(1,270,922)		(1,130,878)
Accumulated other comprehensive income	862		694
Total stockholders' equity	4,957,071		4,760,199
Noncontrolling interest
Total equity	4,957,071		4,760,199
Total liabilities and stockholders' equity	5,003,121		4,791,629
Subsidiary Issuer [Member]
ASSETS
Cash and cash equivalents	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 and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
Investments in and advances to consolidated entities	2,571,770		2,916,557
Total assets	2,571,770		2,916,557
Liabilities:
Loans payable
Senior notes	2,512,877		2,861,375
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	41,052		37,341
Advances from Affiliiate
Income taxes payable
Total liabilities	2,553,929		2,898,716
Equity:
Common stock
Additional paid-in capital	49,400		49,400
Retained earnings	(31,559)		(31,559)
Treasury stock, at cost
Accumulated other comprehensive income
Total stockholders' equity	17,841		17,841
Noncontrolling interest
Total equity	17,841		17,841
Total liabilities and stockholders' equity	2,571,770		2,916,557
Guarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	639,787		1,011,863
Inventory	7,919,772		7,493,205
Property, construction and office equipment, net	273,211		169,265
Receivables, prepaid expenses and other assets	156,167		291,299
Mortgage loans held for sale
Customer deposits held in escrow	87,868		116,332
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	43,488		44,329
Investments in and advances to consolidated entities	163,368		91,740
Total assets	9,283,661		9,218,033
Liabilities:
Loans payable	1,087,303		686,801
Senior notes
Mortgage company loan facility
Customer deposits	426,793		405,318
Accounts payable	344,278		361,655
Accrued expenses	533,912		600,907
Advances from Affiliiate	906,570		1,551,196
Income taxes payable
Total liabilities	3,298,856		3,605,877
Equity:
Common stock	48		48
Additional paid-in capital
Retained earnings	5,984,757		5,612,108
Treasury stock, at cost
Accumulated other comprehensive income
Total stockholders' equity	5,984,805		5,612,156
Noncontrolling interest
Total equity	5,984,805		5,612,156
Total liabilities and stockholders' equity	9,283,661		9,218,033
Nonguarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	196,471		170,332
Inventory	75,304		105,014
Property, construction and office equipment, net	15,531		24,016
Receivables, prepaid expenses and other assets	634,276		392,559
Mortgage loans held for sale	169,251		170,731
Customer deposits held in escrow	175		1,241
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	311,081		387,484
Investments in and advances to consolidated entities	149,108		126,872
Total assets	1,551,197		1,378,249
Liabilities:
Loans payable	1,834
Senior notes
Mortgage company loan facility	150,000		150,000
Customer deposits	2,872		5,546
Accounts payable	387		443
Accrued expenses	390,593		462,128
Advances from Affiliiate	563,336		476,040
Income taxes payable
Total liabilities	1,109,022		1,094,157
Equity:
Common stock	3,006		3,006
Additional paid-in capital	177,034		93,734
Retained earnings	216,763		178,639
Treasury stock, at cost
Accumulated other comprehensive income
Total stockholders' equity	396,803		275,379
Noncontrolling interest	45,372		8,713
Total equity	442,175		284,092
Total liabilities and stockholders' equity	1,551,197		1,378,249
Eliminations [Member]
ASSETS
Cash and cash equivalents	0		0
Inventory
Property, construction and office equipment, net
Receivables, prepaid expenses and other assets	(70,265)		(133,080)
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	(7,887,367)		(7,926,798)
Total assets	(7,957,632)		(8,059,878)
Liabilities:
Loans payable
Senior notes
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	(70,291)		(127,266)
Advances from Affiliiate	(1,469,906)		(2,027,236)
Income taxes payable
Total liabilities	(1,540,197)		(2,154,502)
Equity:
Common stock	(3,054)		(3,054)
Additional paid-in capital	(226,434)		(143,134)
Retained earnings	(6,187,947)		(5,759,188)
Treasury stock, at cost
Accumulated other comprehensive income
Total stockholders' equity	(6,417,435)		(5,905,376)
Noncontrolling interest
Total equity	(6,417,435)		(5,905,376)
Total liabilities and stockholders' equity	$ (7,957,632)		$ (8,059,878)