Supplemental Guarantor Information (Level 4 BS) (Details 1) - USD ($) $ in Thousands	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
ASSETS
Cash and cash equivalents	$ 1,286,014	$ 1,182,195	$ 712,829
Inventory	7,873,048	7,598,219
Property, construction and office equipment, net	273,412	193,281
Receivables, prepaid expenses, and other assets	715,441	550,778
Mortgage loans held for sale	218,777	170,731
Customer deposits held in escrow	74,403	117,573
Investments in unconsolidated entities	366,252	431,813
Investments in and Advances to Affiliates, Amount of Equity	0	0
Income Taxes Receivable	20,791	0
Total assets	10,828,138	10,244,590
Liabilities:
Loans payable	1,111,449	686,801
Senior notes	2,659,898	2,861,375
Mortgage company loan facility	150,000	150,000
Customer deposits	385,596	410,864
Accounts payable	348,599	362,098
Accrued expenses	950,932	973,581
Advances from Affiliiate	0	0
Income taxes payable	102,971	30,959
Total liabilities	5,709,445	5,475,678
Stockholders’ equity:
Common stock	1,529	1,779
Additional paid-in capital	726,879	727,053
Retained earnings	4,774,422	5,161,551
Treasury stock, at cost -- 11,999 shares and 31,774 shares at October 31, 2019 and October 31, 2018, respectively	(425,183)	(1,130,878)
Accumulated other comprehensive loss	(5,831)	694	(1,910)	$ (3,336)
Total stockholders' equity	5,071,816	4,760,199
Noncontrolling interest	46,877	8,713
Total equity	5,118,693	4,768,912	$ 4,537,090	$ 4,235,202
Total liabilities and stockholders' equity	10,828,138	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 unconsolidated entities
Investments in and Advances to Affiliates, Amount of Equity	5,172,737	4,791,629
Income Taxes Receivable	20,791
Total assets	5,193,528	4,791,629
Liabilities:
Loans payable
Senior notes
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	754	471
Advances from Affiliiate
Income taxes payable	102,971	30,959
Total liabilities	103,725	31,430
Stockholders’ equity:
Common stock	1,529	1,779
Additional paid-in capital	726,879	727,053
Retained earnings	4,792,409	5,161,551
Treasury stock, at cost -- 11,999 shares and 31,774 shares at October 31, 2019 and October 31, 2018, respectively	(425,183)	(1,130,878)
Accumulated other comprehensive loss	(5,831)	694
Total stockholders' equity	5,089,803	4,760,199
Noncontrolling interest
Total equity	5,089,803	4,760,199
Total liabilities and stockholders' equity	5,193,528	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 unconsolidated entities
Investments in and Advances to Affiliates, Amount of Equity	2,704,551	2,916,557
Income Taxes Receivable
Total assets	2,704,551	2,916,557
Liabilities:
Loans payable
Senior notes	2,659,898	2,861,375
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	26,812	37,341
Advances from Affiliiate
Income taxes payable
Total liabilities	2,686,710	2,898,716
Stockholders’ equity:
Common stock
Additional paid-in capital	49,400	49,400
Retained earnings	(31,559)	(31,559)
Treasury stock, at cost -- 11,999 shares and 31,774 shares at October 31, 2019 and October 31, 2018, 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	2,704,551	2,916,557
Guarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	1,082,067	1,011,863
Inventory	7,791,759	7,493,205
Property, construction and office equipment, net	263,140	169,265
Receivables, prepaid expenses, and other assets	224,681	291,299
Mortgage loans held for sale
Customer deposits held in escrow	74,303	116,332
Investments in unconsolidated entities	50,594	44,329
Investments in and Advances to Affiliates, Amount of Equity	163,371	91,740
Income Taxes Receivable
Total assets	9,649,915	9,218,033
Liabilities:
Loans payable	1,109,614	686,801
Senior notes
Mortgage company loan facility
Customer deposits	383,583	405,318
Accounts payable	347,715	361,655
Accrued expenses	569,476	600,907
Advances from Affiliiate	1,052,370	1,551,196
Income taxes payable
Total liabilities	3,462,758	3,605,877
Stockholders’ equity:
Common stock	48	48
Additional paid-in capital
Retained earnings	6,187,109	5,612,108
Treasury stock, at cost -- 11,999 shares and 31,774 shares at October 31, 2019 and October 31, 2018, respectively
Accumulated other comprehensive loss
Total stockholders' equity	6,187,157	5,612,156
Noncontrolling interest
Total equity	6,187,157	5,612,156
Total liabilities and stockholders' equity	9,649,915	9,218,033
Non-Guarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	203,947	170,332
Inventory	81,289	105,014
Property, construction and office equipment, net	10,272	24,016
Receivables, prepaid expenses, and other assets	610,541	392,559
Mortgage loans held for sale	218,777	170,731
Customer deposits held in escrow	100	1,241
Investments in unconsolidated entities	315,658	387,484
Investments in and Advances to Affiliates, Amount of Equity	147,413	126,872
Income Taxes Receivable
Total assets	1,587,997	1,378,249
Liabilities:
Loans payable	36,092
Senior notes
Mortgage company loan facility	150,000	150,000
Customer deposits	2,013	5,546
Accounts payable	884	443
Accrued expenses	443,180	462,128
Advances from Affiliiate	503,058	476,040
Income taxes payable
Total liabilities	1,135,227	1,094,157
Stockholders’ equity:
Common stock	3,006	3,006
Additional paid-in capital	177,034	93,734
Retained earnings	225,853	178,639
Treasury stock, at cost -- 11,999 shares and 31,774 shares at October 31, 2019 and October 31, 2018, respectively
Accumulated other comprehensive loss
Total stockholders' equity	405,893	275,379
Noncontrolling interest	46,877	8,713
Total equity	452,770	284,092
Total liabilities and stockholders' equity	1,587,997	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	(119,781)	(133,080)
Mortgage loans held for sale
Customer deposits held in escrow
Investments in unconsolidated entities
Investments in and Advances to Affiliates, Amount of Equity	(8,188,072)	(7,926,798)
Income Taxes Receivable
Total assets	(8,307,853)	(8,059,878)
Liabilities:
Loans payable	(34,257)
Senior notes
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	(89,290)	(127,266)
Advances from Affiliiate	(1,555,428)	(2,027,236)
Income taxes payable
Total liabilities	(1,678,975)	(2,154,502)
Stockholders’ equity:
Common stock	(3,054)	(3,054)
Additional paid-in capital	(226,434)	(143,134)
Retained earnings	(6,399,390)	(5,759,188)
Treasury stock, at cost -- 11,999 shares and 31,774 shares at October 31, 2019 and October 31, 2018, respectively
Accumulated other comprehensive loss
Total stockholders' equity	(6,628,878)	(5,905,376)
Noncontrolling interest
Total equity	(6,628,878)	(5,905,376)
Total liabilities and stockholders' equity	$ (8,307,853)	$ (8,059,878)