Consolidated Statement of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Sales
Sales	$ 1,776.1	$ 1,681.3	$ 3,341.4	$ 3,365.8
Cost of sales
Cost of sales	(1,008.7)	(982.5)	(1,927.5)	(1,964.1)
Gross profit	767.4	698.8	1,413.9	1,401.7
Selling, general and administrative expenses	(421.3)	(352.0)	(795.9)	(755.2)
Change in fair value of investments	190.9	(144.8)	581.3	(73.8)
Other (expense) income	(6.0)	(9.1)	55.0	(18.8)
Interest expense	(23.3)	(25.5)	(45.9)	(51.9)
Income before income taxes	507.7	167.4	1,208.4	502.0
Income tax provision	(97.4)	(37.5)	(207.7)	(56.7)
Net income	410.3	129.9	1,000.7	445.3
Net (loss) income attributable to noncontrolling interests	(4.7)	(2.3)	(7.6)	2.4
Net income attributable to Rockwell Automation, Inc.	$ 415.0	$ 132.2	$ 1,008.3	$ 442.9
Earnings per share:
Basic (in usd per share)	$ 3.57	$ 1.14	$ 8.67	$ 3.82
Diluted (in usd per share)	$ 3.54	$ 1.13	$ 8.59	$ 3.80
Weighted average outstanding shares:
Basic (in shares)	116.1	116.0	116.1	115.8
Diluted (in shares)	117.1	116.6	117.1	116.6
Products and solutions
Sales
Sales	$ 1,599.1	$ 1,506.0	$ 2,993.3	$ 3,014.9
Cost of sales
Cost of sales	(896.0)	(867.9)	(1,702.5)	(1,733.9)
Services
Sales
Sales	177.0	175.3	348.1	350.9
Cost of sales
Cost of sales	$ (112.7)	$ (114.6)	$ (225.0)	$ (230.2)