Other Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Future Amortization Expense 2017	$ 22.6
Future Amortization Expense 2018	21.7
Future Amortization Expense 2019	20.0
Future Amortization Expense 2020	18.0
Future Amortization Expense 2021	17.8
Finite-Lived Intangible Assets [Line Items]
Amortization Expense of Intangible Assets	21.9	$ 26.1	$ 29.4
Acquired Finite-Lived Intangible Assets related to Acquisitions	29.0	10.0
Gross Amount	332.2	327.7
Accumulated Amortization	(184.1)	(179.4)
Net Amount	148.1	148.3
Customer Lists
Finite-Lived Intangible Assets [Line Items]
Gross Amount	252.4	249.0
Accumulated Amortization	(151.4)	(150.0)
Net Amount	101.0	99.0
Trade Names
Finite-Lived Intangible Assets [Line Items]
Gross Amount	65.5	65.0
Accumulated Amortization	(28.9)	(25.7)
Net Amount	36.6	39.3
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Gross Amount	14.3	13.7
Accumulated Amortization	(3.8)	(3.7)
Net Amount	$ 10.5	$ 10.0
Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Useful Life	7 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Useful Life	15 years