Goodwill and Other Intangibles - Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Amortized intangible assets, gross					$ 649.9	$ 674.0
Amortized intangible assets, accumulated amortization	$ 237.1	$ 186.1		$ 186.1	265.8	237.1
Amortized intangible assets, net					384.1	436.9
Other intangible assets, net					439.5	492.7
Amortized intangible assets, future amortization expense [Abstract]
Future Amortization Expense - 2019					38.8
Future Amortization Expense - 2020					38.5
Future Amortization Expense - 2021					38.0
Future Amortization Expense - 2022					36.8
Future Amortization Expense - 2023					31.0
Intangible assets (excluding goodwill), gross [Roll Forward]
Beginning balance, January 1	729.8	649.6
Acquisitions	0.0	72.6	[1]
Held for sale	0.0	(32.7)
Translation adjustment	(24.5)	40.3
Ending balance, December 31	705.3	729.8		649.6
Intangible assets, accumulated amortization [Roll Forward]
Beginning balance, January 1	237.1	186.1
Amortization	40.1	40.0		40.4
Held for sale	0.0	(11.6)
Translation adjustment	(11.4)	22.6
Ending balance, December 31	265.8	237.1		$ 186.1
Patented and unpatented technology [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Amortized intangible assets, gross					151.9	157.7
Amortized intangible assets, accumulated amortization	52.9	52.9			60.7	52.9
Amortized intangible assets, net					91.2	104.8
Intangible assets, accumulated amortization [Roll Forward]
Beginning balance, January 1	52.9
Ending balance, December 31	60.7	52.9
Customer relationships
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Amortized intangible assets, gross					489.7	507.6
Amortized intangible assets, accumulated amortization	181.0	181.0			201.2	181.0
Amortized intangible assets, net					288.5	326.6
Intangible assets, accumulated amortization [Roll Forward]
Beginning balance, January 1	181.0
Ending balance, December 31	201.2	181.0
Miscellaneous amortizable assets
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Amortized intangible assets, gross					8.3	8.7
Amortized intangible assets, accumulated amortization	3.2	3.2			3.9	3.2
Amortized intangible assets, net					4.4	5.5
Intangible assets, accumulated amortization [Roll Forward]
Beginning balance, January 1	3.2
Ending balance, December 31	$ 3.9	$ 3.2
Unamortized trade names
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Unamortized trade names					$ 55.4	$ 55.8
Minimum [Member]
Amortized intangible assets, future amortization expense [Abstract]
Amortized intangible assets, useful life	3 years
Maximum [Member]
Amortized intangible assets, future amortization expense [Abstract]
Amortized intangible assets, useful life	20 years

[1] *Acquisitions primarily relate to the Company's 2017 purchase of Sevcon.