Intangible Assets

3 Months Ended

Mar. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

The gross carrying amount and accumulated amortization for intangible assets consisted of the following ($ in millions):



	March 31, 2015									December 31, 2014
	Gross Carrying Amount		Accumulated Amortization		Foreign Currency Impact			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Foreign Currency Impact		Net Carrying Amount
Amortized intangible assets
Customer-related intangibles (Reconstituted Tobacco)	$	10.0	$	10.0	$	—		$	—	$	10.0	$	10.0	$	—	$	—
Customer Relationships (Filtration)	51.4		2.7		(0.4		)	48.3		51.4		2.1		—		49.3
Developed Technology (Filtration)	16.0		1.6		(0.1		)	14.3		16.0		1.2		—		14.8
Customer Contracts (Filtration)	1.9		0.1		—			1.8		1.9		—		—		1.9
Patents (Filtration)	1.5		—		—			1.5		1.5		—		—		1.5
Total	$	80.8	$	14.4	$	(0.5	)	$	65.9	$	80.8	$	13.3	$	—	$	67.5

Unamortized intangible assets (Filtration)
Trade names	$	21.8								$	21.8

Amortization expense of intangible assets was $1.1 million and $0.8 million for the three months ended March 31, 2015 and 2014, respectively. Finite-lived intangibles in the Filtration segment are expensed using the straight-line amortization method. The estimated average aggregate amortization expense is $4.0 million in each of the next five years.