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Investments Investments (Tables)
 12 Months Ended
Dec. 31, 2018
Investments [Abstract]  
Schedule of Equity Method Investments [Table Text Block]
Our investments primarily consist of equity investments where we hold significant influence over investee actions and for which we apply the equity method of accounting. As of December 31, 2018 and 2017, our investments consisted of the following (in millions): 
 
December 31,
 
2018
 
2017
Citrus Corporation
$
1,708

 
$
1,698

SNG
1,536

 
1,495

Ruby
750

 
774

NGPL Holdings LLC
733

 
687

Gulf LNG Holdings Group, LLC
361

 
461

Plantation Pipe Line Company
344

 
331

Utopia Holding LLC
333

 
276

EagleHawk
299

 
314

Gulf Coast Express Pipeline LLC
240

 
—

MEP
235

 
253

Red Cedar Gathering Company
191

 
187

Watco Companies, LLC
185

 
182

Double Eagle Pipeline LLC
140

 
149

Liberty Pipeline Group LLC
66

 
71

Bear Creek Storage
65

 
63

Sierrita Gas Pipeline LLC
55

 
55

Permian Highway Pipeline
45

 
—

FEP
44

 
112

All others                                                                                                 
151

 
190

Total investments
$
7,481

 
$
7,298
Schedule of earnings from equity investments [Table Text Block]
Our earnings from equity investments were as follows (in millions):
 
Year Ended December 31,
 
2018
 
2017
 
2016
Gulf LNG Holdings Group, LLC(a)
$
209

 
$
47

 
$
48

Citrus Corporation
169

 
108

 
102

SNG
141

 
77

 
58

NGPL Holdings LLC
66

 
10

 
12

FEP
55

 
53

 
51

Plantation Pipe Line Company
55

 
46

 
37

Cortez Pipeline Company(b)
36

 
44

 
24

MEP
31

 
38

 
40

Ruby
26

 
44

 
15

Watco Companies, LLC
21

 
19

 
25

Red Cedar Gathering Company(c)
18

 
14

 
24

Utopia Holding LLC
14

 
—

 
—

Double Eagle Pipeline LLC
10

 
7

 
5

Bear Creek Storage
9

 
8

 
2

EagleHawk
7

 
24

 
10

Liberty Pipeline Group LLC
7

 
9

 
11

Sierrita Gas Pipeline LLC
7

 
7

 
7

Gulf Coast Express LLC
2

 
—

 
—

All others
4

 
23

 
26

Total earnings from equity investments
$
887


$
578

 
$
497

Amortization of excess costs
(95
)
 
(61
)
 
(59
)
_______
(a)
2018 amount includes our share of earnings recognized due to a ruling by an arbitration panel affecting a customer contract.
(b)
2017 and 2016 amounts include $(4) million and $9 million, respectively, representing our share of a non-cash impairment charge (pre-tax) recorded by Cortez Pipeline Company.
(c)
2017 amount includes non-cash impairment charges of $10 million (pre-tax) related to our investment.

Summarized financial info of significant equity investment [Table Text Block]
Summarized combined financial information for our significant equity investments (listed or described above) is reported below (in millions; amounts represent 100% of investee financial information):
 
 
Year Ended December 31,
Income Statement
 
2018
 
2017
 
2016
Revenues
 
$
5,129

 
$
4,703

 
$
4,084

Costs and expenses
 
3,371

 
3,398

 
3,056

Net income
 
$
1,758

 
$
1,305

 
$
1,028

 
 
December 31,
Balance Sheet
 
2018
 
2017
Current assets
 
$
1,496

 
$
956

Non-current assets
 
23,396

 
22,344

Current liabilities
 
2,715

 
1,241

Non-current liabilities
 
9,555

 
10,605

Partners’/owners’ equity
 
12,622

 
11,454