Restructuring (Tables)

6 Months Ended

Jun. 30, 2018

Restructuring And Related Activities [Abstract]

Rollforward of all restructuring activities

The following is a roll-forward of the Company's restructuring activities for the six months ended June 30, 2018 ($ in millions):

	Restructuring Reserve Balance as of December 31, 2017		Restructuring Expenses		Use of Reserve		Reserve Reclassification			Restructuring Reserve Balance as of June 30, 2018
Total	$	5.6	$	10.0	$	10.7	$	(0.5	)	$	4.4