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Supplemental Cash Flow
 9 Months Ended
Sep. 30, 2012
Supplemental Cash Flow [Abstract]  
Supplemental Cash Flow [Text Block]
Supplemental Cash Flow Data
Changes in operating capital for the nine months ended September 30, 2012 and 2011 were (in millions):
 
2012
 
2011
 
 
 
 
 
 
 
 
Decrease in accounts receivable
$
438.1

 
$
85.1

Increase in work in process and other current assets
(205.6
)
 
(208.2
)
Decrease in accounts payable
(697.4
)
 
(780.7
)
Decrease in customer advances and other current liabilities
(314.5
)
 
(266.4
)
Change in other assets and liabilities, net
113.5

 
266.3

 
 
 
 
 
 
 
 
Change in operating capital
$
(665.9
)
 
$
(903.9
)
 
 
 
 
 
 
 
 
Income taxes paid
$
287.5

 
$
246.9

 
 
 
 
Interest paid
$
114.8

 
$
101.5