Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues and other income:
Sales and other operating revenues (including consumer excise taxes)	$ 12,755	$ 17,191
Income from equity method investments	22	15
Net gain on disposal of assets	25	5
Other income	28	29
Total revenues and other income	12,830	17,240
Costs and expenses:
Cost of revenues (excludes items below)	9,701	13,044
Purchases from related parties	107	76
Inventory market valuation charge	15	0
Consumer excise taxes	1,826	1,832
Impairment expense	129	0
Depreciation and amortization	490	363
Selling, general and administrative expenses	378	358
Other taxes	109	97
Total costs and expenses	12,755	15,770
Income from operations	75	1,470
Net interest and other financial income (costs)	(142)	(81)
Income (loss) before income taxes	(67)	1,389
Provision for income taxes	11	486
Net income (loss)	(78)	903
Less net income (loss) attributable to noncontrolling interests	(79)	12
Net income attributable to MPC	$ 1	$ 891
Basic:
Net income attributable to MPC per share	$ 0.003	$ 1.63
Weighted average shares outstanding (in shares)	529	545
Diluted:
Net income attributable to MPC per share	$ 0.003	$ 1.62
Weighted average shares outstanding (in shares)	531	549
Dividends paid (in USD per share)	$ 0.32	$ 0.25