Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Useful Life (in Years)	12 years 6 months	12 years 10 months 30 days
Gross Carrying Amount	$ 462.4	$ 456.4
Accumulated Amortization	$ 106.2	$ 89.3
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Useful Life (in Years)	12 years 8 months 12 days	13 years 1 month
Gross Carrying Amount	$ 429.4	$ 424.5
Accumulated Amortization	$ 93.9	$ 79.8
Trademarks and Trade Names
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Useful Life (in Years)	10 years 6 months	10 years 5 months 30 days
Gross Carrying Amount	$ 28.8	$ 27.7
Accumulated Amortization	$ 10.6	$ 8.1
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Useful Life (in Years)	4 years 1 month 6 days	4 years 3 months
Gross Carrying Amount	$ 4.2	$ 4.2
Accumulated Amortization	$ 1.7	$ 1.4