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Supplemental Cash Flow Data
 6 Months Ended
Jun. 30, 2016
Supplemental Cash Flow Data [Abstract]  
Supplemental Cash Flow Data
Supplemental Cash Flow Data
The change in operating capital for the six months ended June 30, 2016 and 2015 was (in millions):
 
2016
 
2015
(Increase) decrease in accounts receivable
$
891.3

 
$
(127.2
)
(Increase) decrease in work in process and other current assets
(188.5
)
 
(438.3
)
Increase (decrease) in accounts payable
(1,413.4
)
 
(1.5
)
Increase (decrease) in customer advances and other current liabilities
(342.8
)
 
(176.8
)
Change in other assets and liabilities, net
(73.5
)
 
(65.0
)
Cash used for operating capital
$
(1,126.9
)
 
$
(808.8
)
 
 
 
 
Income taxes paid
$
362.5

 
$
330.3

Interest paid
$
106.8

 
$
92.8