Document and Entity Information Document - USD ($)	12 Months Ended
	Oct. 31, 2020	Dec. 18, 2020	Apr. 30, 2020
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Oct. 31, 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	1140 Virginia Drive
Entity Address, City or Town	Fort Washington
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19034
City Area Code	215
Local Phone Number	938-8000
Title of 12(g) Security	None
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
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 Public Float			$ 2,734,093,000
Entity Common Stock, Shares Outstanding		124,838,000
ICFR Auditor Attestation Flag	true
Entity Central Index Key	0000794170
Current Fiscal Year End Date	--10-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false
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
Common Stock [Member] | NEW YORK STOCK EXCHANGE, INC. [Member]
Entity Information [Line Items]
Title of 12(b) Security	Common Stock (par value $.01)
Trading Symbol	TOL
Security Exchange Name	NYSE