Goodwill (Tables)

3 Months Ended

Mar. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The changes in the carrying amount of goodwill by segment for the three months endedMarch 31, 2016 were as follows ($ in millions):

	Engineered Papers		Advanced Materials & Structures		Total
Goodwill as of December 31, 2015	$	4.8	$	228.5	$	233.3
Goodwill acquired during the period	—		0.1		0.1
Foreign currency translation adjustments	0.1		0.1		0.2
Goodwill as of March 31, 2016	$	4.9	$	228.7	$	233.6