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Supplemental Cash Flow Information
 12 Months Ended
Dec. 31, 2019
Supplemental Cash Flow Elements [Abstract]  
Supplemental Cash Flow Information Supplemental cash flow information
The table below provides supplemental cash flow information:
 
Year ended December 31,
 
2019
 
2018
 
2017
Cash paid:
 

 
 

 
 

Income taxes, net
$
157,983

 
$
92,526

 
$
387,159

Interest
$
473,176

 
$
488,974

 
$
424,547

Non-cash investing and financing activities:
 

 
 

 
 

Fixed assets under financing lease obligations
$
18,953

 
$
8,828

 
$
48,378