Acquisition and Strategic Transaction Details - Transaction Expenses - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Business Combinations [Abstract]
Strategic Transaction Costs		$ 1.1
Strategic transaction expenses	$ 15.5	$ 2.4	$ 49.0	$ 3.5