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Income Taxes Components of Net Deferred Tax Liability (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Components of Net Deferred Income Tax [Abstract]      
Deferred Tax Liabilities, Net $ (5,112) $ (4,590) $ (4,410)
Goodwill associated with Sunoco Retail to Sunoco LP transaction (see Note 3) 460 0  
Net assets (excluding goodwill) associated with Sunoco Retail to Sunoco LP (see Note 3) 243 0  
Tax provision, including provision from discontinued operations 201 242  
Other $ (20) $ 62