Cover Page	3 Months Ended
	Dec. 31, 2020 shares
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Dec. 31, 2020
Document Transition Report	false
Entity File Number	1-12383
Entity Registrant Name	Rockwell Automation, Inc.
Entity Incorporation, State or Country Code	DE
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
Title of 12(b) Security	Common Stock ($1.00 par value)
Trading Symbol	ROK
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)	116,155,081
Entity Central Index Key	0001024478
Current Fiscal Year End Date	--09-30
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Amendment Flag	false