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Joint Ownership Agreements
3 Months Ended
Mar. 31, 2017
Regulated Operations [Abstract]  
Joint Ownership Agreements
JOINT OWNERSHIP AGREEMENTS
Southern Company Gas
See Note 4 to the financial statements of Southern Company Gas in Item 8 of the Form 10-K for additional information.
Equity Method Investments
The carrying amounts of Southern Company Gas' equity method investments as of March 31, 2017 and December 31, 2016 and related income from those investments for the successor period ended March 31, 2017 and the predecessor period ended March 31, 2016 were as follows:
 
 
 
Balance Sheet Information
March 31, 2017
December 31, 2016
 
(in millions)
SNG
$
1,430

$
1,394

Triton
44

44

Horizon Pipeline
31

30

PennEast Pipeline
30

22

Atlantic Coast Pipeline
42

33

Pivotal JAX LNG, LLC
26

16

Other
1

2

Total
$
1,604

$
1,541


 
Successor
 
 
Predecessor
Income Statement Information
Three Months Ended March 31, 2017
 
 
Three Months Ended March 31, 2016
 
(in millions)
 
 
(in millions)
SNG
$
34

 
 
$

Horizon Pipeline
1

 
 
1

PennEast Pipeline
3

 
 

Atlantic Coast Pipeline
1

 
 

Total
$
39

 
 
$
1


Southern Natural Gas
In September 2016, Southern Company Gas, through a wholly-owned, indirect subsidiary, acquired a 50% equity interest in SNG, which is accounted for as an equity method investment. On March 31, 2017, Southern Company Gas made an additional $50 million contribution to maintain its 50% equity interest in SNG. See Note 11 to the financial statements of Southern Company Gas under "Investment in SNG" in Item 8 of the Form 10-K for additional information on this investment. Selected financial information of SNG for the first quarter 2017 is as follows:
Income Statement Information
Three Months Ended March 31, 2017
 
(in millions)
Revenues
$
155

Operating income
$
84

Net income
$
66