XML 75 R54.htm IDEA: XBRL DOCUMENT v3.8.0.1
Mergers and Acquisitions - Schedules (Details) - USD ($)
$ in Millions
Aug. 31, 2016
Aug. 31, 2014
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Business Acquisition [Line Items]          
Goodwill     $ 1,430 $ 1,550 $ 1,694
Susser [Member]          
Business Acquisition [Line Items]          
Net assets   $ 1,669      
Total cash consideration, net of cash acquired   $ 903      
Emerge Energy Services L P [Member]          
Business Acquisition [Line Items]          
Current assets $ 27        
Property and equipment 51        
Goodwill 53        
Intangible assets 56        
Current liabilities (16)        
Net assets 171        
Cash acquired 0        
Total cash consideration, net of cash acquired $ 171