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Supplemental Cash Flow
 9 Months Ended
Sep. 30, 2013
Supplemental Cash Flow [Abstract]  
Supplemental Cash Flow
Supplemental Cash Flow Data
Change in operating capital for the nine months ended September 30, 2013 and 2012 were (in millions):
 
2013
 
2012
 
 
 
 
 
 
 
 
(Increase) decrease in accounts receivable
$
294.0

 
$
438.1

(Increase) decrease in work in process and other current assets
(392.8
)
 
(205.6
)
Increase (decrease) in accounts payable
(668.9
)
 
(697.4
)
Increase (decrease) in customer advances and other current liabilities
97.6

 
(314.5
)
Change in other assets and liabilities, net
15.9

 
113.5

 
 
 
 
 
 
 
 
 
$
(654.2
)
 
$
(665.9
)
 
 
 
 
 
 
 
 
Income taxes paid
$
335.2

 
$
287.5

 
 
 
 
Interest paid
$
134.8

 
$
114.8


In connection with the conversion of our 2033 Notes and our 2038 Notes in May 2013, we issued 1,499,792 shares of our common stock to satisfy the conversion premium. These issuances resulted in a non-cash pre-tax financing activity of $95.4 million, excluding the cash tax benefit of $34.5 million, based on the closing prices of our common stock on the settlement dates.