| Document and Entity Information | Feb. 25, 2022 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001598014 |
| Document Type | 8-K |
| Document Period End Date | Feb. 25, 2022 |
| Entity Registrant Name | IHS MARKIT LTD. |
| Entity Incorporation State Country Code | D0 |
| Entity File Number | 001-36495 |
| Entity Tax Identification Number | 98-1166311 |
| Entity Address, Address Line One | 4th Floor |
| Entity Address, Address Line Two | Ropemaker Place |
| Entity Address, Address Line Three | 25 Ropemaker Street |
| Entity Address, City or Town | London |
| Entity Address, Country | GB |
| Entity Address, Postal Zip Code | EC2Y 9LY |
| City Area Code | 20 |
| Local Phone Number | 7260 2000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Shares, $0.01 par value per share |
| Trading Symbol | INFO |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
