| Cover Document | Jan. 28, 2021 | Dec. 03, 2020 |
| Document Information [Line Items] | ||
| Document Type | 8-K | |
| Document Period End Date | Jan. 28, 2021 | |
| Entity Registrant Name | McCormick & Co Inc. | |
| Entity Incorporation, State or Country Code | MD | |
| Entity File Number | 001-14920 | |
| Entity Tax Identification Number | 52-0408290 | |
| Entity Address, Address Line One | 24 Schilling Road | |
| Entity Address, Address Line Two | 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 | |
| Written Communications | false | |
| Soliciting Material | false | |
| Pre-commencement Tender Offer | false | |
| Pre-commencement Issuer Tender Offer | false | |
| Entity Emerging Growth Company | false | |
| Amendment Flag | false | |
| Entity Central Index Key | 0000063754 | |
| Common Stock | ||
| Document Information [Line Items] | ||
| Title of 12(b) Security | Common Stock | |
| Trading Symbol | MKC-V | |
| Security Exchange Name | NYSE | |
| Nonvoting Common Stock | ||
| Document Information [Line Items] | ||
| Title of 12(b) Security | Common Stock Non-Voting | |
| Trading Symbol | MKC | |
| Security Exchange Name | NYSE |
