| Cover Document | Mar. 31, 2020 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Mar. 31, 2020 |
| 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 |
