Goodwill and Other Intangible Assets - Other Intangibles (Details) - USD ($) $ in Millions	Sep. 30, 2025	Sep. 30, 2024
Other intangible assets
Amortized intangible assets, carrying amount	$ 1,512.0	$ 1,591.0
Amortized intangible assets, accumulated amortization	(692.0)	(569.0)
Amortized intangible assets, net	820.0	1,022.0
Total other intangible assets, carrying amount	1,556.0	1,635.0
Total other intangible assets, net	864.0	1,066.0
Software products
Other intangible assets
Amortized intangible assets, carrying amount	108.0	105.0
Amortized intangible assets, accumulated amortization	(83.0)	(76.0)
Amortized intangible assets, net	25.0	29.0
Customer relationships
Other intangible assets
Amortized intangible assets, carrying amount	569.0	619.0
Amortized intangible assets, accumulated amortization	(232.0)	(187.0)
Amortized intangible assets, net	337.0	432.0
Technology
Other intangible assets
Amortized intangible assets, carrying amount	698.0	729.0
Amortized intangible assets, accumulated amortization	(304.0)	(257.0)
Amortized intangible assets, net	394.0	472.0
Trademarks
Other intangible assets
Amortized intangible assets, carrying amount	131.0	132.0
Amortized intangible assets, accumulated amortization	(67.0)	(44.0)
Amortized intangible assets, net	64.0	88.0
Other
Other intangible assets
Amortized intangible assets, carrying amount	6.0	6.0
Amortized intangible assets, accumulated amortization	(6.0)	(5.0)
Amortized intangible assets, net	0.0	1.0
Trademarks
Other intangible assets
Allen-Bradley® trademark not subject to amortization	$ 44.0	$ 44.0