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Consolidated Statements of Income - USD ($)
shares in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Revenues and other income:    
Sales and other operating revenues [1] $ 18,694 $ 16,134
Sales to related parties 172 154
Income from equity method investments 86 57
Net gain on disposal of assets 2 5
Other income 30 43
Total revenues and other income 18,984 16,393
Costs and expenses:    
Cost of revenues (excludes items below) [1] 17,370 14,946
Purchases from related parties 141 122
Depreciation and amortization 528 536
Selling, general and administrative expenses 402 390
Other taxes 103 108
Total costs and expenses 18,544 16,102
Income from operations 440 291
Net interest and other financial costs 183 149
Income before income taxes 257 142
Provision for income taxes 22 41
Net income 235 101
Less net income attributable to:    
Redeemable noncontrolling interest 16 16
Noncontrolling interests 182 55
Net income attributable to MPC $ 37 $ 30
Basic:    
Net income attributable to MPC per share $ 0.08 $ 0.06
Weighted average shares outstanding (in shares) 476 525
Diluted:    
Net income attributable to MPC per share $ 0.08 $ 0.06
Weighted average shares outstanding (in shares) 480 530
Dividends paid (in USD per share) $ 0.46 $ 0.36
[1] The 2018 period reflects an election to present certain taxes on a net basis. See Notes 2 and 3 for further information.