Document and Entity Information	9 Months Ended
	Jun. 30, 2012
Document Information [Line Items]
Entity Registrant Name	ROCKWELL AUTOMATION INC.
Entity Central Index Key	0001024478
Document Type	10-Q
Document Period End Date	Jun. 30, 2012
Amendment Flag	false
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--09-30
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	141,148,269