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Goodwill and Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
The changes in the carrying amount of goodwill by reportable segment were as follows:

($ in millions)
Packaging Systems
Delivery Systems
Total
Balance, December 31, 2013
$
38.0

$
76.2

$
114.2

Disposition
—

(0.5
)
(0.5
)
Foreign currency translation
(3.9
)
(1.2
)
(5.1
)
Balance, December 31, 2014
34.1

74.5

108.6

Foreign currency translation
(3.1
)
(0.9
)
(4.0
)
Balance, December 31, 2015
$
31.0

$
73.6

$
104.6
Schedule of Intangible Assets by Major Class
Intangible assets and accumulated amortization as of December 31 were as follows:

 
2015
2014
($ in millions)
Cost
Accumulated Amortization
Net
Cost
Accumulated Amortization
Net
Patents and licensing
$
19.7

$
(12.8
)
$
6.9

$
20.1

$
(11.5
)
$
8.6

Technology
3.4

(0.6
)
2.8

3.4

(0.4
)
3.0

Trademarks
12.0

(1.4
)
10.6

12.1

(1.3
)
10.8

Customer relationships
29.5

(17.7
)
11.8

29.5

(16.3
)
13.2

Customer contracts
10.8

(5.3
)
5.5

11.2

(4.8
)
6.4

 
$
75.4

$
(37.8
)
$
37.6

$
76.3

$
(34.3
)
$
42.0