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Acquisitions and Investments (Tables)
 12 Months Ended
Dec. 31, 2016
Business Combinations [Abstract]  
Summary of Acquisitions

A summary of the acquisitions follows (in millions):

 

     Years Ended December 31,  
     2016      2015      2014  

Fair value of assets acquired, net of cash acquired

    $ 357       $ 116       $ 406   

Cash paid, net of cash acquired

      (230 )       (86 )       (291 ) 
  

 

 

     

 

 

     

 

 

  

Liabilities assumed, debt issued and noncontrolling interest

    $ 127       $ 30       $ 115   
  

 

 

     

 

 

     

 

 

  

Excess purchase price over fair value of net assets acquired

    $ 152       $ 51       $ 167