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Supplemental Cash Flow Data
 9 Months Ended
Sep. 30, 2018
Supplemental Cash Flow Data [Abstract]  
Supplemental Cash Flow Data
Supplemental Cash Flow Data
The use of operating capital for the nine months ended September 30, 2018 and 2017 was (in millions):
 
2018
 
2017
(Increase) decrease in accounts receivable
$
1,027.5

 
$
645.3

(Increase) decrease in work in process and other current assets
(522.7
)
 
(280.9
)
Increase (decrease) in accounts payable
(1,745.5
)
 
(1,310.8
)
Increase (decrease) in customer advances, taxes payable and other current liabilities
(114.8
)
 
(355.5
)
Change in other assets and liabilities, net
(16.1
)
 
(25.4
)
 
$
(1,371.6
)
 
$
(1,327.3
)
 
 
 
 
Income taxes paid
$
276.4

 
$
398.0

Interest paid
$
177.4

 
$
168.6