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Property, Plant and Equipment
6 Months Ended
Jun. 30, 2013
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Property, Plant and Equipment, net
 
June 30,
 
December 31,
(millions of dollars)
2013
 
2012
Land, land use rights and buildings
$
687.6

 
$
717.2

Machinery and equipment
1,893.2

 
2,282.4

Capital leases
2.4

 
2.3

Construction in progress
277.4

 
243.7

Total property, plant and equipment, gross
2,860.6

 
3,245.6

Less: accumulated depreciation
(1,170.6
)
 
(1,567.0
)
Property, plant and equipment, net, excluding tooling
1,690.0

 
1,678.6

Tooling, net of amortization
106.3

 
109.4

Property, plant and equipment, net
$
1,796.3

 
$
1,788.0



As of June 30, 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 six months ended June 30, 2013 and 2012 were $5.0 million and $9.0 million, respectively.