Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2025	Sep. 30, 2025
Other intangible assets
Amortized intangible assets, carrying amount	$ 1,292	$ 1,512
Amortized intangible assets, accumulated amortization	(561)	(692)
Amortized intangible assets, net	731	820
Total, carrying amount	1,336	1,556
Total, net	775	864
Goodwill and Other Intangible Assets (Textual) [Abstract]
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
Software products
Other intangible assets
Amortized intangible assets, carrying amount	108	108
Amortized intangible assets, accumulated amortization	(85)	(83)
Amortized intangible assets, net	23	25
Customer relationships
Other intangible assets
Amortized intangible assets, carrying amount	418	569
Amortized intangible assets, accumulated amortization	(136)	(232)
Amortized intangible assets, net	282	337
Technology
Other intangible assets
Amortized intangible assets, carrying amount	656	698
Amortized intangible assets, accumulated amortization	(288)	(304)
Amortized intangible assets, net	368	394
Trademarks
Other intangible assets
Amortized intangible assets, carrying amount	108	131
Amortized intangible assets, accumulated amortization	(50)	(67)
Amortized intangible assets, net	58	64
Other
Other intangible assets
Amortized intangible assets, carrying amount	2	6
Amortized intangible assets, accumulated amortization	(2)	(6)
Amortized intangible assets, net	$ 0	$ 0