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Equity Method Investments (Tables)
 12 Months Ended
Dec. 31, 2017
Equity Method Investments and Joint Ventures [Abstract]  
Equity method investments
Equity method investments are as follows:
 
 
December 31,
(millions)
 
2017
 
2016
Equity Method Investments
 
 
 
 
CONE Investments(1)
 
$
—

 
$
172

AMPCO
 
129

 
120

Alba Plant
 
80

 
82

Advantage Pipeline
 
70

 
—

Other
 
26

 
26

Total Equity Method Investments
 
$
305

 
$
400

(1) 
CONE Investments include CONE Midstream and CONE Gathering. The investments are included in assets held for sale at December 31, 2017.
Summarized, 100% combined financial information for equity method investees is as follows:
 
 
December 31,
(millions)
 
2017
 
2016
Balance Sheet Information
 
 
 
 
Current Assets
 
$
390

 
$
313

Noncurrent Assets
 
588

 
1,390

Current Liabilities
 
171

 
149

Noncurrent Liabilities
 
90

 
256

 
 
Year Ended December 31,
(millions)
 
2017
 
2016
 
2015
Statements of Operations Information
 
 
 
 
 
 
Operating Revenues
 
$
790

 
$
667

 
$
645

Operating Expenses
 
303

 
355

 
393

Operating Income
 
487

 
312

 
252

Other (Income) Net
 
(15
)
 
(7
)
 
(9
)
Income Before Income Taxes
 
502

 
319

 
261

Income Tax Provision
 
136

 
60

 
46

Net Income
 
$
366

 
$
259

 
$
215