CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 302	$ 178
Other comprehensive income (loss)
Pension and other postretirement benefit plan adjustments (net of tax expense of $1 and $2)	3	5
Currency translation adjustments	27	(130)
Net change in cash flow hedges (net of tax expense of $1 and $11)	3	25
Other comprehensive income (loss)	33	(100)
Comprehensive income	335	78
Comprehensive loss attributable to noncontrolling interests	(3)	(6)
Comprehensive income attributable to Rockwell Automation, Inc.	$ 338	$ 84