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Segment and Geographic Information (Tables)
 3 Months Ended
Mar. 31, 2018
Segment Reporting [Abstract]  
Schedule of Geographic Distributions of Revenues, Equity in Earnings of Affiliates, Adjusted Segment EBITDA and Depreciation and Amortization

The geographic distributions of our revenues, equity in earnings of affiliates, adjusted segment EBITDA and depreciation and amortization for the quarters ended March 31, 2018 and 2017 are summarized in the following table (dollars in millions):

 

     2018      2017  

Revenues:

      

National Group

    $ 5,568      $ 5,148  

American Group

      5,327        4,995  

Corporate and other

      528        480  
  

 

 

     

 

 

  
   $ 11,423      $ 10,623  
  

 

 

     

 

 

  

Equity in earnings of affiliates:

      

National Group

    $ (2 )     $ (5 ) 

American Group

      (9 )       (8 ) 

Corporate and other

      2        3  
  

 

 

     

 

 

  
   $ (9 )     $ (10 ) 
  

 

 

     

 

 

  

Adjusted segment EBITDA:

      

National Group

    $ 1,182      $ 1,131  

American Group

      1,031        1,007  

Corporate and other

      (95 )       (133 ) 
  

 

 

     

 

 

  
   $ 2,118      $ 2,005  
  

 

 

     

 

 

  

Depreciation and amortization:

      

National Group

    $ 225      $ 214  

American Group

      252        238  

Corporate and other

      76        69  
  

 

 

     

 

 

  
   $ 553      $ 521  
  

 

 

     

 

 

  

Adjusted segment EBITDA

    $ 2,118      $ 2,005  

Depreciation and amortization

      553        521  

Interest expense

      431        419  

Gains on sales of facilities

      (405 )       (1 ) 
  

 

 

     

 

 

  

Income before income taxes

    $ 1,539      $ 1,066