Document and Entity Information Document - shares	6 Months Ended
	Apr. 30, 2020	Jun. 03, 2020
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Apr. 30, 2020
Document Transition Report	false
Entity File Number	001-09186
Entity Registrant Name	Toll Brothers, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	23-2416878
Entity Address, Address Line One	250 Gibraltar Road
Entity Address, City or Town	Horsham
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19044
City Area Code	215
Local Phone Number	938-8000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		125,629,000
Entity Central Index Key	0000794170
Current Fiscal Year End Date	--10-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Amendment Flag	false
Common Stock [Member] | NEW YORK STOCK EXCHANGE, INC. [Member]
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	TOL
Security Exchange Name	NYSE
Senior Notes Due 2024 [Member] | NEW YORK STOCK EXCHANGE, INC. [Member]
Entity Information [Line Items]
Title of 12(b) Security	Guarantee of Toll Brothers Finance Corp. 5.625% Senior Notes due 2024
Trading Symbol	TOL/24
Security Exchange Name	NYSE