| Document and Entity Information Statement | Jul. 28, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Jul. 28, 2020 |
| Entity Registrant Name | Rockwell Automation, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 1-12383 |
| Entity Tax Identification Number | 25-1797617 |
| Entity Address, Address Line One | 1201 South Second Street |
| Entity Address, City or Town | Milwaukee |
| Entity Address, State or Province | WI |
| Entity Address, Postal Zip Code | 53204 |
| City Area Code | 414 |
| Local Phone Number | 382-2000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock ($1.00 par value) |
| Trading Symbol | ROK |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001024478 |
| Amendment Flag | false |
