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Supplemental Cash Flow (Tables)
 6 Months Ended
Jun. 30, 2012
Supplemental Cash Flow [Abstract]  
Changes in Operating Capital [Table Text Block]
Changes in operating capital for the six months ended June 30, 2012 and 2011 were (in millions):
 
2012
 
2011
 
 
 
 
 
 
 
 
Decrease in accounts receivable
$
570.6

 
$
299.5

Increase in work in process and other current assets
(221.3
)
 
(115.9
)
Decrease in accounts payable
(571.8
)
 
(813.0
)
Decrease in customer advances and other current liabilities
(319.1
)
 
(391.4
)
Change in other assets and liabilities, net
34.8

 
207.6

 
 
 
 
 
 
 
 
Change in operating capital
$
(506.8
)
 
$
(813.2
)
 
 
 
 
 
 
 
 
Income taxes paid
$
237.0

 
$
168.5

 
 
 
 
Interest paid
$
75.1

 
$
72.9