Supplemental Guarantor Information (Level 4 BS) (Details 1) - USD ($) $ in Thousands	Apr. 30, 2017	Oct. 31, 2016	Apr. 30, 2016	Oct. 31, 2015	Oct. 31, 2014
ASSETS
Cash and cash equivalents	$ 691,266	$ 633,715	$ 423,178	$ 918,993	$ 918,993
Restricted cash and investments	797	31,291
Inventory	7,602,695	7,353,967
Property, construction and office equipment, net	173,449	169,576
Receivables, prepaid expenses and other assets	536,514	582,758
Mortgage loans held for sale	89,485	248,601
Customer deposits held in escrow	74,493	53,057
Investments in unconsolidated entities	540,215	496,411
Investments in and advances to consolidated entities	0	0
Deferred tax assets, net of valuation allowances	158,050	167,413
Total assets	9,866,964	9,736,789
Liabilities:
Loans payable	637,931	871,079
Senior notes	2,993,882	2,694,372
Mortgage company loan facility	61,129	210,000
Customer deposits	387,940	309,099
Accounts payable	305,500	281,955
Accrued expenses	937,396	1,072,300
Advances from Affiliiate	0	0
Income taxes payable	89,191	62,782
Total liabilities	5,412,969	5,501,587
Equity:
Common stock	1,779	1,779
Additional paid-in capital	716,124	728,464
Retained earnings	4,159,300	3,977,297
Treasury stock, at cost	(426,116)	(474,912)
Accumulated other comprehensive loss	(2,999)	(3,336)
Total stockholders' equity	4,448,088	4,229,292
Noncontrolling interest	5,907	5,910
Total equity	4,453,995	4,235,202
Total liabilities and stockholders' equity	9,866,964	9,736,789
Toll Brothers Inc. [Member]
ASSETS
Cash and cash equivalents	0	0	0	0	0
Restricted cash and investments		11,708
Inventory
Property, construction and office equipment, net
Receivables, prepaid expenses and other assets		77
Mortgage loans held for sale
Customer deposits held in escrow
Investments in unconsolidated entities
Investments in and advances to consolidated entities	4,379,229	4,112,876
Deferred tax assets, net of valuation allowances	158,050	167,413
Total assets	4,537,279	4,292,074
Liabilities:
Loans payable
Senior notes
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses
Advances from Affiliiate
Income taxes payable	89,191	62,782
Total liabilities	89,191	62,782
Equity:
Common stock	1,779	1,779
Additional paid-in capital	716,124	728,464
Retained earnings	4,159,300	3,977,297
Treasury stock, at cost	(426,116)	(474,912)
Accumulated other comprehensive loss	(2,999)	(3,336)
Total stockholders' equity	4,448,088	4,229,292
Noncontrolling interest
Total equity	4,448,088	4,229,292
Total liabilities and stockholders' equity	4,537,279	4,292,074
Subsidiary Issuer [Member]
ASSETS
Cash and cash equivalents	0	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 unconsolidated entities
Investments in and advances to consolidated entities	3,045,059	2,741,160
Deferred tax assets, net of valuation allowances
Total assets	3,045,059	2,741,160
Liabilities:
Loans payable
Senior notes	2,987,990	2,683,823
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	35,231	32,559
Advances from Affiliiate
Income taxes payable
Total liabilities	3,023,221	2,716,382
Equity:
Common stock
Additional paid-in capital	49,400	49,400
Retained earnings	(27,562)	(24,622)
Treasury stock, at cost
Accumulated other comprehensive loss
Total stockholders' equity	21,838	24,778
Noncontrolling interest
Total equity	21,838	24,778
Total liabilities and stockholders' equity	3,045,059	2,741,160
Guarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	602,081	583,440	291,821	783,599	783,599
Restricted cash and investments
Inventory	7,323,997	6,896,205
Property, construction and office equipment, net	158,001	153,663
Receivables, prepaid expenses and other assets	362,081	319,319
Mortgage loans held for sale
Customer deposits held in escrow	72,088	50,079
Investments in unconsolidated entities	82,450	101,999
Investments in and advances to consolidated entities	91,740	20,519
Deferred tax assets, net of valuation allowances
Total assets	8,692,438	8,125,224
Liabilities:
Loans payable	630,764	871,079
Senior notes
Mortgage company loan facility
Customer deposits	368,389	292,794
Accounts payable	303,078	280,107
Accrued expenses	592,050	610,958
Advances from Affiliiate	2,276,748	1,737,682
Income taxes payable
Total liabilities	4,171,029	3,792,620
Equity:
Common stock	48	48
Additional paid-in capital
Retained earnings	4,521,361	4,332,556
Treasury stock, at cost
Accumulated other comprehensive loss
Total stockholders' equity	4,521,409	4,332,604
Noncontrolling interest
Total equity	4,521,409	4,332,604
Total liabilities and stockholders' equity	8,692,438	8,125,224
Nonguarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	89,185	50,275	131,357	135,394	135,394
Restricted cash and investments	797	19,583
Inventory	278,698	457,806
Property, construction and office equipment, net	15,448	15,913
Receivables, prepaid expenses and other assets	228,506	299,978
Mortgage loans held for sale	89,485	248,601
Customer deposits held in escrow	2,405	2,978
Investments in unconsolidated entities	457,765	394,412
Investments in and advances to consolidated entities	168,054	90,671
Deferred tax assets, net of valuation allowances
Total assets	1,330,343	1,580,217
Liabilities:
Loans payable	7,167
Senior notes
Mortgage company loan facility	61,129	210,000
Customer deposits	19,551	16,305
Accounts payable	2,422	1,848
Accrued expenses	375,644	469,527
Advances from Affiliiate	693,772	799,082
Income taxes payable
Total liabilities	1,159,685	1,496,762
Equity:
Common stock	3,006	3,006
Additional paid-in capital	93,734	6,734
Retained earnings	68,011	67,805
Treasury stock, at cost
Accumulated other comprehensive loss
Total stockholders' equity	164,751	77,545
Noncontrolling interest	5,907	5,910
Total equity	170,658	83,455
Total liabilities and stockholders' equity	1,330,343	1,580,217
Eliminations [Member]
ASSETS
Cash and cash equivalents	0	0	$ 0	$ 0	$ 0
Restricted cash and investments
Inventory		(44)
Property, construction and office equipment, net
Receivables, prepaid expenses and other assets	(54,073)	(36,616)
Mortgage loans held for sale
Customer deposits held in escrow
Investments in unconsolidated entities
Investments in and advances to consolidated entities	(7,684,082)	(6,965,226)
Deferred tax assets, net of valuation allowances
Total assets	(7,738,155)	(7,001,886)
Liabilities:
Loans payable
Senior notes	5,892	10,549
Mortgage company loan facility
Customer deposits
Accounts payable
Accrued expenses	(65,529)	(40,744)
Advances from Affiliiate	(2,970,520)	(2,536,764)
Income taxes payable
Total liabilities	(3,030,157)	(2,566,959)
Equity:
Common stock	(3,054)	(3,054)
Additional paid-in capital	(143,134)	(56,134)
Retained earnings	(4,561,810)	(4,375,739)
Treasury stock, at cost
Accumulated other comprehensive loss
Total stockholders' equity	(4,707,998)	(4,434,927)
Noncontrolling interest
Total equity	(4,707,998)	(4,434,927)
Total liabilities and stockholders' equity	$ (7,738,155)	$ (7,001,886)