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Segment Information (Tables)
9 Months Ended
Sep. 30, 2018
Segment Reporting [Abstract]  
Income From Operations Attributable To Operating Segments
Segment income represents income from operations attributable to the reportable segments. Corporate administrative expenses, except for those attributable to MPLX, and costs related to certain non-operating assets are not allocated to the reportable segments. In addition, certain items that affect comparability (as determined by the chief operating decision maker) are not allocated to the reportable segments. In the third quarter we began reporting segment capital expenditures and investments excluding acquisitions in the current and comparative periods.

(In millions)
Refining & Marketing
 
Speedway
 
Midstream
 
Total
Three Months Ended September 30, 2018
 
 
 
 
 
 
 
Revenues:
 
 
 
 
 
 
 
Third party
$
16,552

 
$
5,393

 
$
842

 
$
22,787

Intersegment
2,931

 
1

 
787

 
3,719

Related party
199

 
2

 

 
201

Segment revenues
$
19,682

 
$
5,396

 
$
1,629

 
$
26,707

Segment income from operations
$
666

 
$
161

 
$
679

 
$
1,506

Income from equity method investments
7

 
18

 
71

 
96

Depreciation and amortization(a)
257

 
76

 
205

 
538

Capital expenditures and investments(b)
226

 
98

 
593

 
917


(In millions)
Refining & Marketing
 
Speedway
 
Midstream
 
Total
Three Months Ended September 30, 2017
 
 
 
 
 
 
 
Revenues:
 
 
 
 
 
 
 
Third party
$
13,573

 
$
4,895

 
$
585

 
$
19,053

Intersegment(c)
2,904

 
1

 
369

 
3,274

Related party
155

 
2

 

 
157

Segment revenues
$
16,632

 
$
4,898

 
$
954

 
$
22,484

Segment income from operations
$
1,097

 
$
208

 
$
355

 
$
1,660

Income from equity method investments(a)
6

 
20

 
57

 
83

Depreciation and amortization(a)
266

 
68

 
169

 
503

Capital expenditures and investments(b)
198

 
108

 
423

 
729

(In millions)
Refining & Marketing
 
Speedway
 
Midstream
 
Total
Nine Months Ended September 30, 2018
 
 
 
 
 
 
 
Revenues:
 
 
 
 
 
 
 
Third party
$
46,069

 
$
15,225

 
$
2,305

 
$
63,599

Intersegment
8,181

 
4

 
2,180

 
10,365

Related party
566

 
6

 

 
572

Segment revenues
$
54,816

 
$
15,235

 
$
4,485

 
$
74,536

Segment income from operations
$
1,558

 
$
415

 
$
1,863

 
$
3,836

Income from equity method investments(a)
14

 
51

 
196

 
261

Depreciation and amortization(a)
761

 
228

 
577

 
1,566

Capital expenditures and investments(b)
613

 
225

 
1,676

 
2,514


(In millions)
Refining & Marketing
 
Speedway
 
Midstream
 
Total
Nine Months Ended September 30, 2017
 
 
 
 
 
 
 
Revenues:
 
 
 
 
 
 
 
Third party
$
37,485

 
$
14,070

 
$
1,665

 
$
53,220

Intersegment(c)
8,302

 
3

 
1,076

 
9,381

Related party
452

 
6

 

 
458

Segment revenues
$
46,239

 
$
14,079

 
$
2,741

 
$
63,059

Segment income from operations
$
1,589

 
$
581

 
$
996

 
$
3,166

Income from equity method investments(a)
10

 
54

 
139

 
203

Depreciation and amortization(a)
805

 
197

 
528

 
1,530

Capital expenditures and investments(b)
570

 
221

 
1,267

 
2,058


(a) 
Differences between segment totals and MPC totals represent amounts related to corporate and other unallocated items and are included in items not allocated to segments in the reconciliation below.
(b) 
Capital expenditures include changes in capital accruals and investments in affiliates. See reconciliation from segment totals to MPC total capital expenditures below.
(c) 
Management believes intersegment transactions were conducted under terms comparable to those with unaffiliated parties.
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)
2018
 
2017
 
2018
 
2017
Segment income from operations
$
1,506

 
$
1,660

 
$
3,836

 
$
3,166

Items not allocated to segments:
 
 
 
 
 
 
 
Corporate and other unallocated items(a)
(103
)
 
(85
)
 
(283
)
 
(251
)
Litigation

 

 

 
(86
)
Impairments(b)

 
2

 
1

 
21

Income from operations
1,403

 
1,577

 
3,554

 
2,850

Net interest and other financial costs
240

 
158

 
618

 
465

Income before income taxes
$
1,163

 
$
1,419

 
$
2,936

 
$
2,385

(a) 
Corporate and other unallocated items consists primarily of MPC’s corporate administrative expenses and costs related to certain non-operating assets, except for corporate overhead expenses attributable to MPLX, which are included in the Midstream segment. Corporate overhead expenses are not allocated to the Refining & Marketing and Speedway segments.
(b) 
Includes MPC’s share of gains from the sale of assets remaining from the canceled Sandpiper pipeline project.

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)
2018
 
2017
 
2018
 
2017
Segment capital expenditures and investments
$
917

 
$
729

 
$
2,514

 
$
2,058

Less investments in equity method investees
104

 
53

 
222

 
230

Plus items not allocated to segments:
 
 
 
 
 
 
 
Corporate
7

 
19

 
42

 
53

Capitalized interest
21

 
13

 
55

 
39

Total capital expenditures(a)
$
841

 
$
708

 
$
2,389

 
$
1,920

(a) 
Capital expenditures include changes in capital accruals. 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.
Revenue from External Customers by Products and Services
Revenues by product line were as follows:
 
Three Months Ended 
 September 30,
 
Nine Months Ended 
 September 30,
(In millions)
2018
 
2017
 
2018
 
2017
Refined products
$
19,815

 
$
16,374

 
$
55,265

 
$
45,689

Merchandise
1,340

 
1,370

 
3,756

 
3,905

Crude oil and refinery feedstocks
1,011

 
878

 
2,872

 
2,389

Midstream services, transportation and other
621

 
431

 
1,706

 
1,237

Sales and other operating revenues
$
22,787

 
$
19,053

 
$
63,599

 
$
53,220