Supplemental Guarantor Information (Level 4 BS) (Details 1) - USD ($) $ in Thousands	Apr. 30, 2020	Jan. 31, 2020	Oct. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018
ASSETS
Cash and cash equivalents	$ 741,222		$ 1,286,014	$ 924,448
Inventory	8,195,633		7,873,048
Property, construction and office equipment, net	278,518		273,412
Receivables, prepaid expenses and other assets	983,094		715,441
Mortgage loans held for sale	141,007		218,777
Customer deposits held in escrow	74,690		74,403
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	364,041		366,252
Investments in and advances to consolidated entities	0		0
Income Taxes Receivable	32,606		20,791
Total assets	10,810,811		10,828,138
Liabilities:
Loans payable	1,556,572		1,111,449
Senior notes	2,660,815		2,659,898
Mortgage company loan facility	106,018		150,000
Customer deposits	419,653		385,596	385,600
Accounts payable	350,019		348,599
Accrued expenses	998,543		950,932
Advances from Affiliiate	0		0
Income taxes payable	105,469		102,971
Total liabilities	6,197,089		5,709,445
Equity:
Common stock	1,529		1,529
Additional paid-in capital	725,246		726,879
Retained earnings	4,878,017		4,774,422
Treasury stock, at cost	(1,034,999)		(425,183)
Accumulated other comprehensive income	(5,275)		(5,831)
Total stockholders' equity	4,564,518		5,071,816
Noncontrolling interest	49,204		46,877
Total equity	4,613,722	$ 4,705,080	5,118,693	$ 4,986,240	$ 4,861,189	$ 4,768,912
Total liabilities and stockholders' equity	10,810,811		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	5,667
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	4,656,426		5,172,737
Income Taxes Receivable	32,606		20,791
Total assets	4,694,699		5,193,528
Liabilities:
Loans payable
Senior notes
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	6,724		754
Advances from Affiliiate
Income taxes payable	105,469		102,971
Total liabilities	112,193		103,725
Equity:
Common stock	1,529		1,529
Additional paid-in capital	725,246		726,879
Retained earnings	4,896,005		4,792,409
Treasury stock, at cost	(1,034,999)		(425,183)
Accumulated other comprehensive income	(5,275)		(5,831)
Total stockholders' equity	4,582,506		5,089,803
Noncontrolling interest
Total equity	4,582,506		5,089,803
Total liabilities and stockholders' equity	4,694,699		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
Customer deposits held in escrow
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
Investments in and advances to consolidated entities	2,712,458		2,704,551
Income Taxes Receivable
Total assets	2,712,458		2,704,551
Liabilities:
Loans payable
Senior notes	2,660,815		2,659,898
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	33,802		26,812
Advances from Affiliiate
Income taxes payable
Total liabilities	2,694,617		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	2,712,458		2,704,551
Guarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	610,591		1,082,067
Inventory	8,099,842		7,791,759
Property, construction and office equipment, net	276,552		263,140
Receivables, prepaid expenses and other assets	254,310		224,681
Mortgage loans held for sale
Customer deposits held in escrow	74,648		74,303
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	44,545		50,594
Investments in and advances to consolidated entities	185,516		163,371
Income Taxes Receivable
Total assets	9,546,004		9,649,915
Liabilities:
Loans payable	1,554,721		1,109,614
Senior notes
Mortgage company loan facility
Customer deposits	418,047		383,583
Accounts payable	330,970		347,715
Accrued expenses	566,295		569,476
Advances from Affiliiate	351,458		1,052,370
Income taxes payable
Total liabilities	3,221,491		3,462,758
Equity:
Common stock	48		48
Additional paid-in capital
Retained earnings	6,324,465		6,187,109
Treasury stock, at cost
Accumulated other comprehensive income
Total stockholders' equity	6,324,513		6,187,157
Noncontrolling interest
Total equity	6,324,513		6,187,157
Total liabilities and stockholders' equity	9,546,004		9,649,915
Nonguarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	130,631		203,947
Inventory	95,791		81,289
Property, construction and office equipment, net	1,966		10,272
Receivables, prepaid expenses and other assets	774,796		610,541
Mortgage loans held for sale	141,007		218,777
Customer deposits held in escrow	42		100
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	319,496		315,658
Investments in and advances to consolidated entities	206,756		147,413
Income Taxes Receivable
Total assets	1,670,485		1,587,997
Liabilities:
Loans payable	36,109		36,092
Senior notes
Mortgage company loan facility	106,018		150,000
Customer deposits	2,122		2,013
Accounts payable	19,049		884
Accrued expenses	444,970		443,180
Advances from Affiliiate	578,997		503,058
Income taxes payable
Total liabilities	1,187,265		1,135,227
Equity:
Common stock	3,006		3,006
Additional paid-in capital	199,034		177,034
Retained earnings	231,976		225,853
Treasury stock, at cost
Accumulated other comprehensive income
Total stockholders' equity	434,016		405,893
Noncontrolling interest	49,204		46,877
Total equity	483,220		452,770
Total liabilities and stockholders' equity	1,670,485		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	(51,679)		(119,781)
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	(7,761,156)		(8,188,072)
Income Taxes Receivable
Total assets	(7,812,835)		(8,307,853)
Liabilities:
Loans payable	(34,258)		(34,257)
Senior notes
Mortgage company loan facility
Customer deposits	(516)
Accounts payable
Accrued expenses	(53,248)		(89,290)
Advances from Affiliiate	(930,455)		(1,555,428)
Income taxes payable
Total liabilities	(1,018,477)		(1,678,975)
Equity:
Common stock	(3,054)		(3,054)
Additional paid-in capital	(248,434)		(226,434)
Retained earnings	(6,542,870)		(6,399,390)
Treasury stock, at cost
Accumulated other comprehensive income
Total stockholders' equity	(6,794,358)		(6,628,878)
Noncontrolling interest
Total equity	(6,794,358)		(6,628,878)
Total liabilities and stockholders' equity	$ (7,812,835)		$ (8,307,853)