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Property, Plant and Equipment (Tables)
12 Months Ended
Dec. 31, 2012
Property, Plant and Equipment [Abstract]  
Summary of Property, Plant and Equipment

A summary of gross property, plant and equipment at December 31 is presented in the following table:

($ in millions)
Expected useful lives (years)
2012

2011

Land
 
$
9.0

$
8.9

Buildings and improvements
5-50
310.9

284.1

Machinery and equipment
10-15
607.1

565.7

Molds and dies
4-7
90.1

85.8

Computer hardware and software
3-10
102.5

76.2

Construction in progress
 
155.2

116.1

 
 
$
1,274.8

$
1,136.8