Consolidated Statement of Shareowners' Equity - USD ($) $ in Millions		Total	Total attributable to Rockwell Automation, Inc.	Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive loss	Common stock in treasury, at cost	Noncontrolling interests
Beginning of period at Sep. 30, 2021		$ 2,694.1	$ 2,389.6	$ 181.4	$ 1,933.6	$ 8,000.4	$ (1,017.1)	$ (6,708.7)	$ 304.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		919.1	932.2			932.2			(13.1)
Other comprehensive income (loss)		99.3	99.6				99.6		(0.3)
Common stock issued (including share-based compensation impact)		126.1	126.1		73.5			52.6
Share repurchases		(301.1)	(301.1)					(301.1)
Cash dividends declared	[1]	(520.8)	(520.8)			(520.8)
End of period at Sep. 30, 2022		3,016.7	2,725.6	181.4	2,007.1	8,411.8	(917.5)	(6,957.2)	291.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		1,278.0	1,387.4			1,387.4			(109.4)
Other comprehensive income (loss)		127.5	127.4				127.4		0.1
Common stock issued (including share-based compensation impact)		177.2	177.2		95.4			81.8
Share repurchases		(312.0)	(312.0)					(312.0)
Cash dividends declared	[1]	(544.0)	(544.0)			(544.0)
End of period at Sep. 30, 2023		3,743.4	3,561.6	181.4	2,102.5	9,255.2	(790.1)	(7,187.4)	181.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		947.3	952.5			952.5			(5.2)
Other comprehensive income (loss)		18.0	17.7				17.7		0.3
Common stock issued (including share-based compensation impact)		138.9	138.9		86.1			52.8
Share repurchases		(599.6)	(599.6)					(599.6)
Cash dividends declared	[1]	(572.8)	(572.8)			(572.8)
End of period at Sep. 30, 2024		$ 3,675.2	$ 3,498.3	$ 181.4	$ 2,188.6	$ 9,634.9	$ (772.4)	$ (7,734.2)	$ 176.9

[1] Cash dividends were $5.00 per share in 2024; $4.72 per share in 2023; and $4.48 per share in 2022.