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Property, Plant and Equipment
9 Months Ended
Sep. 30, 2012
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Property, Plant and Equipment, net
 
September 30,
 
December 31,
(millions of dollars)
2012
 
2011
Land and buildings
$
695.9

 
$
687.9

Machinery and equipment
2,201.6

 
2,006.9

Capital leases
2.4

 
2.3

Construction in progress
229.1

 
206.8

Total property, plant and equipment, gross
3,129.0

 
2,903.9

Less: accumulated depreciation
(1,534.4
)
 
(1,343.9
)
Property, plant and equipment, net, excluding tooling
1,594.6

 
1,560.0

Tooling, net of amortization
104.1

 
104.3

Property, plant and equipment, net
$
1,698.7

 
$
1,664.3



As of September 30, 2012 and December 31, 2011, accounts payable of $19.9 million and $48.9 million, respectively, were related to property, plant and equipment purchases.

Interest costs capitalized for the nine months ended September 30, 2012 and 2011 were $13.5 million and $9.0 million, respectively.