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Supplemental Cash Flow Data
 6 Months Ended
Jun. 30, 2017
Supplemental Cash Flow Data [Abstract]  
Supplemental Cash Flow Data
Supplemental Cash Flow Data
The increase (decrease) in operating capital for the six months ended June 30, 2017 and 2016 was (in millions):
 
2017
 
2016
(Increase) decrease in accounts receivable
$
460.3

 
$
891.3

(Increase) decrease in work in process and other current assets
(277.5
)
 
(188.5
)
Increase (decrease) in accounts payable
(785.9
)
 
(1,413.4
)
Increase (decrease) in customer advances and other current liabilities
(412.1
)
 
(357.4
)
Change in other assets and liabilities, net
(113.3
)
 
(73.5
)
 
$
(1,128.5
)
 
$
(1,141.5
)
 
 
 
 
Income taxes paid
$
339.0

 
$
362.5

Interest paid
$
111.2

 
$
106.8