Supplemental Guarantor Information (Level 4 BS) (Details 1) - USD ($) $ in Thousands	Jul. 31, 2020	Apr. 30, 2020	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Oct. 31, 2018
ASSETS
Cash and cash equivalents	$ 559,348		$ 1,286,014	$ 836,258
Inventory	8,034,515		7,873,048
Property, construction and office equipment, net	313,513		273,412
Receivables, prepaid expenses and other assets	968,416		715,441
Mortgage loans held for sale, at fair value	161,540		218,777
Customer deposits held in escrow	78,094		74,403
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	412,766		366,252
Investments in and advances to consolidated entities	0		0
Income Taxes Receivable	9,239		20,791
Total assets	10,537,431		10,828,138
Liabilities:
Loans payable	1,082,025		1,111,449
Senior notes	2,661,301		2,659,898
Mortgage company loan facility	122,189		150,000
Customer deposits	437,008		385,596
Accounts payable	375,900		348,599
Accrued expenses	1,014,822		950,932
Advances from Affiliiate	0		0
Income taxes payable	118,058		102,971
Total liabilities	5,811,303		5,709,445
Equity:
Common stock	1,529		1,529
Additional paid-in capital	722,115		726,879
Retained earnings	4,978,832		4,774,422
Treasury stock, at cost	(1,022,406)		(425,183)
Accumulated other comprehensive income	(4,996)		(5,831)
Total stockholders' equity	4,675,074		5,071,816
Noncontrolling interest	51,054		46,877
Total equity	4,726,128	$ 4,613,722	5,118,693	$ 4,984,457	$ 4,986,240	$ 4,768,912
Total liabilities and stockholders' equity	10,537,431		10,828,138
Toll Brothers Inc. [Member]
ASSETS
Cash and cash equivalents	0		0
Inventory
Property, construction and office equipment, net
Receivables, prepaid expenses and other assets	5,412
Mortgage loans held for sale, at fair value
Customer deposits held in escrow
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
Investments in and advances to consolidated entities	4,803,019		5,172,737
Income Taxes Receivable	9,239		20,791
Total assets	4,817,670		5,193,528
Liabilities:
Loans payable
Senior notes
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	6,551		754
Advances from Affiliiate
Income taxes payable	118,058		102,971
Total liabilities	124,609		103,725
Equity:
Common stock	1,529		1,529
Additional paid-in capital	722,115		726,879
Retained earnings	4,996,819		4,792,409
Treasury stock, at cost	(1,022,406)		(425,183)
Accumulated other comprehensive income	(4,996)		(5,831)
Total stockholders' equity	4,693,061		5,089,803
Noncontrolling interest
Total equity	4,693,061		5,089,803
Total liabilities and stockholders' equity	4,817,670		5,193,528
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, at fair value
Customer deposits held in escrow
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
Investments in and advances to consolidated entities	2,719,647		2,704,551
Income Taxes Receivable
Total assets	2,719,647		2,704,551
Liabilities:
Loans payable
Senior notes	2,661,301		2,659,898
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	40,505		26,812
Advances from Affiliiate
Income taxes payable
Total liabilities	2,701,806		2,686,710
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	2,719,647		2,704,551
Guarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	434,550		1,082,067
Inventory	7,941,516		7,791,759
Property, construction and office equipment, net	311,670		263,140
Receivables, prepaid expenses and other assets	266,760		224,681
Mortgage loans held for sale, at fair value
Customer deposits held in escrow	77,678		74,303
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	44,524		50,594
Investments in and advances to consolidated entities	185,516		163,371
Income Taxes Receivable
Total assets	9,262,214		9,649,915
Liabilities:
Loans payable	1,082,262		1,109,614
Senior notes
Mortgage company loan facility
Customer deposits	435,281		383,583
Accounts payable	375,859		347,715
Accrued expenses	600,656		569,476
Advances from Affiliiate	328,899		1,052,370
Income taxes payable
Total liabilities	2,822,957		3,462,758
Equity:
Common stock	48		48
Additional paid-in capital
Retained earnings	6,439,209		6,187,109
Treasury stock, at cost
Accumulated other comprehensive income
Total stockholders' equity	6,439,257		6,187,157
Noncontrolling interest
Total equity	6,439,257		6,187,157
Total liabilities and stockholders' equity	9,262,214		9,649,915
Nonguarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	124,798		203,947
Inventory	92,999		81,289
Property, construction and office equipment, net	1,843		10,272
Receivables, prepaid expenses and other assets	776,158		610,541
Mortgage loans held for sale, at fair value	161,540		218,777
Customer deposits held in escrow	416		100
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	368,242		315,658
Investments in and advances to consolidated entities	206,698		147,413
Income Taxes Receivable
Total assets	1,732,694		1,587,997
Liabilities:
Loans payable	34,020		36,092
Senior notes
Mortgage company loan facility	122,189		150,000
Customer deposits	1,727		2,013
Accounts payable	41		884
Accrued expenses	417,937		443,180
Advances from Affiliiate	666,132		503,058
Income taxes payable
Total liabilities	1,242,046		1,135,227
Equity:
Common stock	3,006		3,006
Additional paid-in capital	199,034		177,034
Retained earnings	237,554		225,853
Treasury stock, at cost
Accumulated other comprehensive income
Total stockholders' equity	439,594		405,893
Noncontrolling interest	51,054		46,877
Total equity	490,648		452,770
Total liabilities and stockholders' equity	1,732,694		1,587,997
Eliminations [Member]
ASSETS
Cash and cash equivalents	0		0
Inventory
Property, construction and office equipment, net
Receivables, prepaid expenses and other assets	(79,914)		(119,781)
Mortgage loans held for sale, at fair value
Customer deposits held in escrow
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
Investments in and advances to consolidated entities	(7,914,880)		(8,188,072)
Income Taxes Receivable
Total assets	(7,994,794)		(8,307,853)
Liabilities:
Loans payable	(34,257)		(34,257)
Senior notes
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	(50,827)		(89,290)
Advances from Affiliiate	(995,031)		(1,555,428)
Income taxes payable
Total liabilities	(1,080,115)		(1,678,975)
Equity:
Common stock	(3,054)		(3,054)
Additional paid-in capital	(248,434)		(226,434)
Retained earnings	(6,663,191)		(6,399,390)
Treasury stock, at cost
Accumulated other comprehensive income
Total stockholders' equity	(6,914,679)		(6,628,878)
Noncontrolling interest
Total equity	(6,914,679)		(6,628,878)
Total liabilities and stockholders' equity	$ (7,994,794)		$ (8,307,853)