Segment Information (Tables)

9 Months Ended

Sep. 30, 2014

Segment Reporting [Abstract]

Income From Operations Attributable To Operating Segments

(In millions)	Refining & Marketing		Speedway		Pipeline Transportation		Total
Three Months Ended September 30, 2014
Revenues:
Customer	$	21,568	$	3,854	$	16	$	25,438
Intersegment(a)	2,400		2		136		2,538
Segment revenues	$	23,968	$	3,856	$	152	$	27,976
Segment income from operations(b)	$	971	$	119	$	69	$	1,159
Income from equity method investments	17		—		12		29
Depreciation and amortization(c)	257		33		20		310
Capital expenditures and investments(d)(f)	318		2,707		224		3,249

(In millions)	Refining & Marketing		Speedway		Pipeline Transportation		Total
Three Months Ended September 30, 2013
Revenues:
Customer	$	22,481	$	3,755	$	20	$	26,256
Intersegment(a)	2,439		1		117		2,557
Segment revenues	$	24,920	$	3,756	$	137	$	28,813
Segment income from operations(b)	$	227	$	102	$	54	$	383
Income from equity method investments	8		—		1		9
Depreciation and amortization(c)	246		29		19		294
Capital expenditures and investments(d)	243		65		42		350

(In millions)	Refining & Marketing		Speedway		Pipeline Transportation		Total
Nine Months Ended September 30, 2014
Revenues:
Customer	$	64,295	$	11,220	$	52	$	75,567
Intersegment(a)	7,223		4		396		7,623
Segment revenues	$	71,518	$	11,224	$	448	$	83,190
Segment income from operations(b)	$	2,593	$	271	$	222	$	3,086
Income from equity method investments	76		—		45		121
Depreciation and amortization(c)	782		90		58		930
Capital expenditures and investments(d)(f)	731		2,783		418		3,932

(In millions)	Refining & Marketing		Speedway		Pipeline Transportation		Total
Nine Months Ended September 30, 2013
Revenues:
Customer	$	64,245	$	10,964	$	60	$	75,269
Intersegment(a)	7,072		3		340		7,415
Segment revenues	$	71,317	$	10,967	$	400	$	82,684
Segment income from operations(b)	$	2,235	$	292	$	163	$	2,690
Income from equity method investments	7		—		9		16
Depreciation and amortization(c)	734		83		55		872
Capital expenditures and investments(d)(e)	1,797		177		173		2,147

^(a)  Management believes intersegment transactions were conducted under terms comparable to those with unaffiliated parties.

^(b)  Corporate overhead expenses attributable to MPLX are included in the Pipeline Transportation segment. Corporate overhead expenses are not allocated to the Refining & Marketing and Speedway segments.

^(c)  Differences between segment totals and MPC totals represent amounts related to unallocated items and are included in “Items not allocated to segments” in the reconciliation below.

^(d)  Capital expenditures include changes in capital accruals, acquisitions and investments in affiliates.

^(e)  The Refining & Marketing and Pipeline Transportation segments include $1.29 billion and $70 million, respectively, for the acquisition of the Galveston Bay Refinery and Related Assets. See Note 4.

^(f)  The Speedway and Refining & Marketing segments include $2.63 billion and $54 million, respectively, for the acquisition of Hess' Retail Operations and Related Assets. See Note 4.

Reconciliation Of Segment Income From Operations To Income Before Income Taxes

The following reconciles segment income from operations to income before income taxes as reported in the consolidated statements of income:

	Three Months Ended   September 30,						Nine Months Ended   September 30,
(In millions)	2014			2013			2014			2013
Segment income from operations	$	1,159		$	383		$	3,086		$	2,690
Items not allocated to segments:
Corporate and other unallocated items(a)(b)	(76		)	(59		)	(204		)	(190		)
Pension settlement expenses(c)	(21		)	(23		)	(90		)	(83		)
Net interest and other financial income (costs)	(50		)	(47		)	(144		)	(140		)
Income before income taxes	$	1,012		$	254		$	2,648		$	2,277

^(a)  Corporate and other unallocated items consists primarily of MPC’s corporate administrative expenses and costs related to certain non-operating assets.

^(b)  Corporate overhead expenses attributable to MPLX are included in the Pipeline Transportation segment. Corporate overhead expenses are not allocated to the Refining & Marketing and Speedway segments.

^(c)  See Note 20.

Reconciliation Of Segment Capital Expenditures And Investments To Total Capital Expenditures

The following reconciles segment capital expenditures and investments to total capital expenditures:

	Three Months Ended   September 30,				Nine Months Ended   September 30,
(In millions)	2014		2013		2014		2013
Segment capital expenditures and investments	$	3,249	$	350	$	3,932	$	2,147
Less: Investments in equity method investees	177		75		341		86
Plus: Items not allocated to segments:
Capital expenditures not allocated to segments	22		54		60		106
Capitalized interest	7		7		20		15
Total capital expenditures(a)(b)	$	3,101	$	336	$	3,671	$	2,182

^(a)  Capital expenditures include changes in capital accruals and acquisitions.

^(b)  See Note 18 for a reconciliation of total capital expenditures to additions to property, plant and equipment as reported in the consolidated statements of cash flows.

Reconciliation Of Total Revenues To Sales And Other Operating Revenues

The following reconciles customer revenues to sales and other operating revenues (including consumer excise taxes) as reported in the consolidated statements of income:

	Three Months Ended   September 30,				Nine Months Ended   September 30,
(In millions)	2014		2013		2014		2013
Customer revenues (as reported above)	$	25,438	$	26,256	$	75,567	$	75,269
Corporate and other unallocated items	—		—		—		(6		)
Sales and other operating revenues (including consumer excise taxes)	$	25,438	$	26,256	$	75,567	$	75,263

Total Assets By Reportable Segment

Total assets by reportable segment were:

(In millions)	September 30, 2014		December 31, 2013
Refining & Marketing	$	20,207	$	19,573
Speedway	5,203		2,064
Pipeline Transportation	2,329		1,947
Corporate and Other	3,966		4,801
Total consolidated assets	$	31,705	$	28,385