Restructuring, Merger and Integration Costs (Tables)

3 Months Ended

Mar. 31, 2018

Business Combinations [Abstract]

Schedule of Acquisition Related Costs

The aggregate costs associated with the restructuring, merger and integration costs are summarized in the following table:

	Three Months Ended
(millions) (unaudited)	March 31, 2018		March 31, 2017
General and administrative expenses	$	1.2	$	0.1