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Property, Plant and Equipment
3 Months Ended
Mar. 31, 2013
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Property, Plant and Equipment, net
 
March 31,
 
December 31,
(millions of dollars)
2013
 
2012
Land, land use rights and buildings
$
706.8

 
$
717.2

Machinery and equipment
2,262.4

 
2,282.4

Capital leases
2.3

 
2.3

Construction in progress
249.5

 
243.7

Total property, plant and equipment, gross
3,221.0

 
3,245.6

Less: accumulated depreciation
(1,563.6
)
 
(1,567.0
)
Property, plant and equipment, net, excluding tooling
1,657.4

 
1,678.6

Tooling, net of amortization
107.8

 
109.4

Property, plant and equipment, net
$
1,765.2

 
$
1,788.0



As of March 31, 2013 and December 31, 2012, accounts payable of $30.6 million and $39.8 million, respectively, were related to property, plant and equipment purchases.

Interest costs capitalized for the three months ended March 31, 2013 and 2012 were $2.5 million and $4.5 million, respectively.