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Property, Plant and Equipment
3 Months Ended
Mar. 31, 2012
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Property, Plant and Equipment, net
 
March 31,
 
December 31,
(millions of dollars)
2012
 
2011
Land and buildings
$
697.1

 
$
687.9

Machinery and equipment
2,084.4

 
2,006.9

Capital leases
2.4

 
2.3

Construction in progress
192.8

 
206.8

Total property, plant & equipment, gross
2,976.7

 
2,903.9

Less: accumulated depreciation
(1,385.0
)
 
(1,343.9
)
Property, plant & equipment, net, excluding tooling
1,591.7

 
1,560.0

Tooling, net of amortization
104.7

 
104.3

Property, plant and equipment, net
$
1,696.4

 
$
1,664.3



As of March 31, 2012 and December 31, 2011, accounts payable of $27.6 million and $48.9 million, respectively, were related to property, plant and equipment purchases.

Interest costs capitalized for the three months ended March 31, 2012 and 2011 were $4.5 million and $3.0 million, respectively.