Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues and other income:
Sales and other operating revenues (including consumer excise taxes)	$ 63,339	$ 72,051	$ 97,817
Income (loss) from equity method investments	(185)	88	153
Net gain on disposal of assets	32	7	21
Other income	178	112	111
Total revenues and other income	63,364	72,258	98,102
Costs and expenses:
Cost of revenues (excludes items below)	49,170	55,583	83,770
Purchases from related parties	509	308	505
Inventory market valuation adjustment	(370)	370	0
Consumer excise taxes	7,506	7,692	6,685
Impairment expense	130	144	0
Depreciation and amortization	2,001	1,502	1,326
Selling, general and administrative expenses	1,605	1,576	1,375
Other taxes	435	391	390
Total costs and expenses	60,986	67,566	94,051
Income from operations	2,378	4,692	4,051
Net interest and other financial income (costs)	(556)	(318)	(216)
Income before income taxes	1,822	4,374	3,835
Provision for income taxes	609	1,506	1,280
Net income	1,213	2,868	2,555
Less net income (loss) attributable to:
Redeemable noncontrolling interest	41	0	0
Noncontrolling interests	(2)	16	31
Net income attributable to MPC	$ 1,174	$ 2,852	$ 2,524
Basic:
Net income attributable to MPC per share	$ 2.22	$ 5.29	$ 4.42
Weighted average shares outstanding (in shares)	528	538	570
Diluted:
Net income attributable to MPC per share	$ 2.21	$ 5.26	$ 4.39
Weighted average shares outstanding (in shares)	530	542	574
Dividends paid (in USD per share)	$ 1.36	$ 1.14	$ 0.92