Acquisition, Restructuring and Integration Costs (Tables)

6 Months Ended

Jun. 30, 2019

Business Combinations [Abstract]

Schedule of acquisition related costs

The aggregate costs associated with the acquisition, restructuring, and integration related costs for the three and six months ended June 30, 2019 and June 30, 2018 are summarized in the following table:

	Three Months Ended				Six Months Ended
(millions) (unaudited)	June 30, 2019		June 30, 2018		June 30, 2019		June 30, 2018
General and administrative expenses	$	0.3	$	1.6	$	1.3	$	2.8