Goodwill and Other Intangible Assets - Schedule of Other Intangible Assets (Details) - USD ($) $ in Millions	Jun. 30, 2026	Sep. 30, 2025
Other intangible assets
Software products, carrying amount	$ 110	$ 108
Software products, accumulated amortization	(90)	(83)
Software products, net	20	25
Amortized intangible assets and software products, carrying amount	1,278	1,512
Amortized intangible assets and software products, accumulated amortization	(612)	(692)
Amortized intangible assets and software products, net	666	820
Total, carrying amount	1,322	1,556
Total, net	710	864
Goodwill and Other Intangible Assets
Estimated amortization expense in 2026	131
Estimated amortization expense in 2027	122
Estimated amortization expense in 2028	111
Estimated amortization expense in 2029	73
Estimated amortization expense in 2030	71
Trademarks
Other intangible assets
Allen-Bradley® trademark not subject to amortization	44	44
Customer relationships
Other intangible assets
Amortized intangible assets, carrying amount	418	569
Amortized intangible assets, accumulated amortization	(152)	(232)
Amortized intangible assets, net	266	337
Technology
Other intangible assets
Amortized intangible assets, carrying amount	643	698
Amortized intangible assets, accumulated amortization	(314)	(304)
Amortized intangible assets, net	329	394
Trademarks
Other intangible assets
Amortized intangible assets, carrying amount	104	131
Amortized intangible assets, accumulated amortization	(53)	(67)
Amortized intangible assets, net	51	64
Other
Other intangible assets
Amortized intangible assets, carrying amount	3	6
Amortized intangible assets, accumulated amortization	(3)	(6)
Amortized intangible assets, net	$ 0	$ 0