Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 294,900	$ 49,400	$ 673,600	$ 288,300
Other comprehensive income (loss)
Pension and other postretirement benefit plan adjustments (net of tax expense of $(10.2), $(66.5), $(9.8), and $(71.9))	31,100	187,400	30,700	204,300
Currency translation adjustments	25,300	(9,800)	111,100	(29,300)
Net change in cash flow hedges (net of tax (expense) benefit of $(0.4), $(0.6), $8.5, and $(3.2))	300	1,800	(20,800)	9,300
Other comprehensive income (loss)	56,700	179,400	121,000	184,300
Comprehensive income	351,600	228,800	794,600	472,600
Comprehensive loss attributable to noncontrolling interests	(5,800)	(4,200)	(11,100)	(6,800)
Comprehensive income attributable to Rockwell Automation, Inc.	$ 357,400	$ 233,000	$ 805,700	$ 479,400