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Goodwill and Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2014
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, 2012
$
36.7

$
75.8

$
112.5

Foreign currency translation
1.3

0.4

1.7

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

 
2014
2013
($ in millions)
Cost
Accumulated Amortization
Net
Cost
Accumulated Amortization
Net
Patents and licensing
$
20.1

$
(11.5
)
$
8.6

$
20.7

$
(9.4
)
$
11.3

Technology
3.4

(0.4
)
3.0

3.5

(0.1
)
3.4

Trademarks
12.1

(1.3
)
10.8

12.1

(1.1
)
11.0

Customer relationships
29.5

(16.3
)
13.2

29.7

(14.6
)
15.1

Customer contracts
11.2

(4.8
)
6.4

11.7

(4.2
)
7.5

 
$
76.3

$
(34.3
)
$
42.0

$
77.7

$
(29.4
)
$
48.3