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Goodwill and Purchased Intangible Assets - Goodwill by Segment (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Goodwill [Line Items]
Gross	$ 2,593.3	$ 2,550.3
Accumulated Impairment	(1,145.9)	(1,140.2)
Net	1,447.4	1,410.1
Access
Goodwill [Line Items]
Gross	1,985.9	1,943.1
Accumulated Impairment	(932.1)	(932.1)
Net	1,053.8	1,011.0
Vocational
Goodwill [Line Items]
Gross	563.0	562.8
Accumulated Impairment	(169.4)	(169.4)
Net	393.6	393.4
Corporate and Other
Goodwill [Line Items]
Gross	44.4	44.4
Accumulated Impairment	(44.4)	(38.7)
Net	$ 0.0	$ 5.7

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