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Supplemental Cash Flow
 3 Months Ended
Mar. 31, 2012
Supplemental Cash Flow [Abstract]  
Supplemental Cash Flow [Text Block]
Supplemental Cash Flow Data
Changes in operating capital for the three months ended March 31, 2012 and 2011 were (in millions):
 
2012
 
2011
 
 
 
 
 
 
 
 
Decrease in accounts receivable
$
796.5

 
$
729.6

Increase in work in process and other current assets
(163.6
)
 
(203.1
)
Decrease in accounts payable
(932.2
)
 
(971.9
)
Increase (decrease) in customer advances and other current liabilities
10.9

 
(70.8
)
Change in other assets and liabilities, net
(22.6
)
 
163.6

 
 
 
 
 
 
 
 
Change in operating capital
$
(311.0
)
 
$
(352.6
)
 
 
 
 
 
 
 
 
Income taxes paid
$
123.0

 
$
86.7

 
 
 
 
Interest paid
$
41.1

 
$
49.3