CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 178.0	$ 213.0
Other comprehensive income (loss)
Pension and other postretirement benefit plan adjustments (net of tax (expense) benefit of $(2) and $0)	5.0	0.0
Currency translation adjustments	(130.0)	84.0
Net change in cash flow hedges (net of tax (expense) benefit of $(11) and $9)	25.0	(24.0)
Other comprehensive (loss) income	(100.0)	60.0
Comprehensive income	78.0	273.0
Comprehensive loss attributable to noncontrolling interests	(6.0)	(2.0)
Comprehensive income attributable to Rockwell Automation, Inc.	$ 84.0	$ 275.0