| Document and Entity Information | Sep. 30, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Sep. 30, 2021 |
| Entity Registrant Name | Ingersoll Rand Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-38095 |
| Entity Tax Identification Number | 46-2393770 |
| Entity Address, Address Line One | 800-A Beaty Street |
| Entity Address, City or Town | Davidson |
| Entity Address, State or Province | NC |
| Entity Address, Postal Zip Code | 28036 |
| City Area Code | 704 |
| Local Phone Number | 655-4000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001699150 |
| Title of 12(b) Security | Common Stock, Par Value $0.01 Per Share |
| Trading Symbol | IR |
| Security Exchange Name | NYSE |
