Acquisitions (Details) $ in Millions	1 Months Ended	6 Months Ended
	Jan. 31, 2017 USD ($)	Dec. 31, 2016 USD ($) acquisition
Business Acquisition [Line Items]
Number of businesses acquired | acquisition		1
Payments to acquire businesses, gross		$ 20.0
Subsequent Event [Member]
Business Acquisition [Line Items]
Business comnbination, contingent consideration, liability	$ 35.0
Payments to acquire businesses, gross	$ 70.0