Supplemental Guarantor Information (Level 4 BS) (Details 1) - USD ($) $ in Thousands	Jul. 31, 2018	Oct. 31, 2017	Jul. 31, 2017	Oct. 31, 2016
ASSETS
Cash and cash equivalents	$ 522,181	$ 712,829	$ 946,195	$ 633,715
Restricted cash and investments	686	2,482
Inventory	7,957,616	7,281,453
Property, construction and office equipment, net	195,728	189,547
Receivables, prepaid expenses and other assets	622,402	542,217
Mortgage loans held for sale	94,291	132,922
Customer deposits held in escrow	136,322	102,017
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	419,994	481,758
Investments in and advances to consolidated entities	0	0
Total assets	9,949,220	9,445,225
Liabilities:
Loans payable	694,409	637,416
Senior notes	2,860,771	2,462,463
Mortgage company loan facility	82,274	120,145
Customer deposits	470,231	396,026
Accounts payable	327,872	275,223
Accrued expenses	936,084	959,353
Advances from Affiliiate	0	0
Income taxes payable	40,199	57,509
Total liabilities	5,411,840	4,908,135
Equity:
Common stock	1,779	1,779
Additional paid-in capital	722,461	720,115
Retained earnings	4,866,980	4,474,064
Treasury stock, at cost	(1,060,746)	(662,854)
Accumulated other comprehensive loss	(1,810)	(1,910)
Total stockholders' equity	4,528,664	4,531,194
Noncontrolling interest	8,716	5,896
Total equity	4,537,380	4,537,090
Total liabilities and stockholders' equity	9,949,220	9,445,225
Toll Brothers Inc. [Member]
ASSETS
Cash and cash equivalents	0	0	0	0
Restricted cash and investments
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	4,569,837	4,589,228
Total assets	4,569,837	4,589,228
Liabilities:
Loans payable
Senior notes
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	974	141
Advances from Affiliiate
Income taxes payable	40,199	57,893
Total liabilities	41,173	58,034
Equity:
Common stock	1,779	1,779
Additional paid-in capital	722,461	720,115
Retained earnings	4,866,980	4,474,064
Treasury stock, at cost	(1,060,746)	(662,854)
Accumulated other comprehensive loss	(1,810)	(1,910)
Total stockholders' equity	4,528,664	4,531,194
Noncontrolling interest
Total equity	4,528,664	4,531,194
Total liabilities and stockholders' equity	4,569,837	4,589,228
Subsidiary Issuer [Member]
ASSETS
Cash and cash equivalents	0	0	0	0
Restricted cash and investments
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	2,921,962	2,514,649
Total assets	2,921,962	2,514,649
Liabilities:
Loans payable
Senior notes	2,860,771	2,462,463
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	43,350	34,345
Advances from Affiliiate
Income taxes payable
Total liabilities	2,904,121	2,496,808
Equity:
Common stock
Additional paid-in capital	49,400	49,400
Retained earnings	(31,559)	(31,559)
Treasury stock, at cost
Accumulated other comprehensive loss
Total stockholders' equity	17,841	17,841
Noncontrolling interest
Total equity	17,841	17,841
Total liabilities and stockholders' equity	2,921,962	2,514,649
Guarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	333,839	533,204	784,527	583,440
Restricted cash and investments		1,500
Inventory	7,810,796	7,017,331
Property, construction and office equipment, net	171,560	165,464
Receivables, prepaid expenses and other assets	302,064	319,592
Mortgage loans held for sale
Customer deposits held in escrow	129,855	96,956
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	44,991	66,897
Investments in and advances to consolidated entities	155,315	91,740
Total assets	8,948,420	8,292,684
Liabilities:
Loans payable	694,409	637,416
Senior notes
Mortgage company loan facility
Customer deposits	457,712	377,083
Accounts payable	326,518	271,617
Accrued expenses	581,208	563,577
Advances from Affiliiate	1,592,201	1,584,957
Income taxes payable
Total liabilities	3,652,048	3,434,650
Equity:
Common stock	48	48
Additional paid-in capital
Retained earnings	5,296,324	4,857,986
Treasury stock, at cost
Accumulated other comprehensive loss
Total stockholders' equity	5,296,372	4,858,034
Noncontrolling interest
Total equity	5,296,372	4,858,034
Total liabilities and stockholders' equity	8,948,420	8,292,684
Nonguarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	188,342	179,625	161,668	50,275
Restricted cash and investments	686	982
Inventory	146,820	264,122
Property, construction and office equipment, net	24,168	24,083
Receivables, prepaid expenses and other assets	420,319	296,699
Mortgage loans held for sale	94,291	132,922
Customer deposits held in escrow	6,467	5,061
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	375,003	414,861
Investments in and advances to consolidated entities	128,331	126,799
Total assets	1,384,427	1,445,154
Liabilities:
Loans payable
Senior notes
Mortgage company loan facility	82,274	120,145
Customer deposits	12,519	18,943
Accounts payable	1,354	3,606
Accrued expenses	418,578	440,631
Advances from Affiliiate	592,763	659,904
Income taxes payable		(384)
Total liabilities	1,107,488	1,242,845
Equity:
Common stock	3,006	3,006
Additional paid-in capital	93,734	93,734
Retained earnings	171,483	99,673
Treasury stock, at cost
Accumulated other comprehensive loss
Total stockholders' equity	268,223	196,413
Noncontrolling interest	8,716	5,896
Total equity	276,939	202,309
Total liabilities and stockholders' equity	1,384,427	1,445,154
Eliminations [Member]
ASSETS
Cash and cash equivalents	0	0	$ 0	$ 0
Restricted cash and investments
Inventory
Property, construction and office equipment, net
Receivables, prepaid expenses and other assets	(99,981)	(74,074)
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	(7,775,445)	(7,322,416)
Total assets	(7,875,426)	(7,396,490)
Liabilities:
Loans payable
Senior notes
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	(108,026)	(79,341)
Advances from Affiliiate	(2,184,964)	(2,244,861)
Income taxes payable
Total liabilities	(2,292,990)	(2,324,202)
Equity:
Common stock	(3,054)	(3,054)
Additional paid-in capital	(143,134)	(143,134)
Retained earnings	(5,436,248)	(4,926,100)
Treasury stock, at cost
Accumulated other comprehensive loss
Total stockholders' equity	(5,582,436)	(5,072,288)
Noncontrolling interest
Total equity	(5,582,436)	(5,072,288)
Total liabilities and stockholders' equity	$ (7,875,426)	$ (7,396,490)