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Property, Plant and Equipment
9 Months Ended
Sep. 30, 2013
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Property, Plant and Equipment, net
 
September 30,
 
December 31,
(millions of dollars)
2013
 
2012
Land, land use rights and buildings
$
738.6

 
$
717.2

Machinery and equipment
1,848.0

 
2,282.4

Capital leases
2.4

 
2.3

Construction in progress
265.0

 
243.7

Total property, plant and equipment, gross
2,854.0

 
3,245.6

Less: accumulated depreciation
(1,086.5
)
 
(1,567.0
)
Property, plant and equipment, net, excluding tooling
1,767.5

 
1,678.6

Tooling, net of amortization
107.9

 
109.4

Property, plant and equipment, net
$
1,875.4

 
$
1,788.0



As of September 30, 2013 and December 31, 2012, accounts payable of $35.8 million and $39.8 million, respectively, were related to property, plant and equipment purchases.

Interest costs capitalized for the nine months ended September 30, 2013 and 2012 were $8.5 million and $13.5 million, respectively.