Document and Entity Information	3 Months Ended
	Feb. 29, 2020 shares
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Feb. 29, 2020
Document Transition Report	false
Entity File Number	001-14920
Entity Registrant Name	MCCORMICK & CO INC
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	52-0408290
Entity Address, Address Line One	24 Schilling Road, Suite 1,
Entity Address, City or Town	Hunt Valley,
Entity Address, State or Province	MD
Entity Address, Postal Zip Code	21031
City Area Code	410
Local Phone Number	771-7301
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 Central Index Key	0000063754
Current Fiscal Year End Date	--11-30
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Amendment Flag	false
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common Stock
Trading Symbol	MKC-V
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding	9,263,314
Nonvoting Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common Stock Non-Voting
Trading Symbol	MKC
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding	123,640,577