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
Balance at 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)		288.3	295.4
Other comprehensive income (loss)		184.3	184.0				184.0		0.3
Common stock issued (including share-based compensation impact)		73.3	73.3		33.7			39.6
Share repurchases		(49.4)	(49.4)					(49.4)
Cash dividends declared	[1]	(260.7)	(260.7)			(260.7)
Balance at end of period at Mar. 31, 2022		2,929.9	2,632.2	181.4	1,967.3	8,035.1	(833.1)	(6,718.5)	297.7
Balance at beginning of period at Dec. 31, 2021		2,806.8	2,504.9	181.4	1,953.0	8,111.7	(1,012.2)	(6,729.0)	301.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		49.4	53.9			53.9			(4.5)
Other comprehensive income (loss)		179.4	179.1				179.1		0.3
Common stock issued (including share-based compensation impact)		24.8	24.8		14.3			10.5
Share repurchases		0.0	0.0					0.0
Cash dividends declared	[2]	(130.5)	(130.5)			(130.5)
Balance at end of period at Mar. 31, 2022		2,929.9	2,632.2	181.4	1,967.3	8,035.1	(833.1)	(6,718.5)	297.7
Balance at beginning 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)		673.6	684.3
Other comprehensive income (loss)		121.0	121.4				121.4		(0.4)
Common stock issued (including share-based compensation impact)		90.6	90.6		41.9			48.7
Share repurchases		(194.5)	(194.5)					(194.5)
Cash dividends declared	[1]	(271.9)	(271.9)			(271.9)
Balance at end of period at Mar. 31, 2023		3,435.5	3,155.5	181.4	2,049.0	8,824.2	(796.1)	(7,103.0)	280.0
Balance at beginning of period at Dec. 31, 2022		3,200.6	2,914.8	181.4	2,015.7	8,659.9	(853.2)	(7,089.0)	285.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		294.9	300.3			300.3
Other comprehensive income (loss)		56.7	57.1				57.1		(0.4)
Common stock issued (including share-based compensation impact)		57.8	57.8		33.3			24.5
Share repurchases		(38.5)	(38.5)					(38.5)
Cash dividends declared	[2]	(136.0)	(136.0)			(136.0)
Balance at end of period at Mar. 31, 2023		$ 3,435.5	$ 3,155.5	$ 181.4	$ 2,049.0	$ 8,824.2	$ (796.1)	$ (7,103.0)	$ 280.0

[1] Cash dividends were $2.36 per share and $2.24 per share in the six months ended March 31, 2023 and 2022, respectively.

[2] (1) Cash dividends were $1.18 per share and $1.12 per share in the three months ended March 31, 2023 and 2022, respectively.