Goodwill and Other Intangible Assets, Amortization (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Goodwill and Other Intangible Assets
Amortization expense	$ 11.6	$ 8.9	$ 42.8	$ 25.6
Amortization expense estimated for each of the next five fiscal years
Remainder of 2016	11.9		11.9
2017	47.8		47.8
2018	43.7		43.7
2019	39.5		39.5
2020	33.4		33.4
2021	$ 28.8		$ 28.8