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Equity Method Investments (Tables)
9 Months Ended
Sep. 30, 2019
Equity Method Investments and Joint Ventures [Abstract]  
Schedule of Equity Investments in Affiliates
Equity method investments comprise the following as of the dates indicated:

September 30, 2019December 31, 2018
OwnershipInvestment AmountOwnershipInvestment Amount
Amberjack – Series A / Series B75.0% / 50.0%  $433  75.0% / 50.0%  $458  
Mars71.5%  162  71.5%  169  
Bengal50.0%  88  50.0%  82  
Permian Basin50.0%  81  50.0%  72  
LOCAP41.48%   41.48%   
Explorer (1)
38.59%  89  12.62%  —  
Poseidon36.0%  —  36.0%  —  
Colonial (1)
16.125%  31  6.0%  —  
Proteus10.0%  15  10.0%  16  
Endymion10.0%  18  10.0%  18  
$926  $823  
(1) As part of the June 2019 Acquisition, these interests have been accounted for prospectively. See below for additional information.
Schedule of Equity Investments in Affiliates Balance Affected
Earnings from our equity method investments were as follows during the periods indicated:

Three Months Ended September 30,Nine Months Ended September 30,
2019201820192018
Amberjack (1)
$31  $33  $94  $49  
Mars35  30  93  76  
Bengal  18  15  
Explorer (2)
20  —  27  —  
Colonial (2)
17  —  21  —  
Poseidon (3)
—  —  —   
Other (4)
  12  15  
$115  $73  $265  $161  
(1) We acquired an interest in Amberjack in May 2018. The acquisition of this interest has been accounted for prospectively.
(2) As stated above, we acquired additional interests in Explorer and Colonial in June 2019. The acquisition of these interests has been accounted for prospectively.
(3) As stated above, the equity method of accounting has been suspended for Poseidon and excess distributions are recorded in Other income.
(4) Included in Other is the activity associated with our investments in Permian Basin, LOCAP, Proteus and Endymion.
Summary of Income Statement Data for Equity Method Investments
The following tables present aggregated selected unaudited income statement data for our equity method investments on a 100% basis. However, during periods in which an acquisition occurs, the selected unaudited income statement data reflects activity from the date of the acquisition.

Three Months Ended September 30, 2019
Total revenues Total operating expenses Operating income Net income
Statements of Income
Amberjack$80  $18  $62  $62  
Mars82  32  50  50  
Bengal22   15  15  
Explorer122  51  71  55  
Colonial354  190  164  109  
Poseidon31   22  20  
Other (1)
44  21  23  21  
(1) Included in Other is the activity associated with our investments in Permian Basin, LOCAP, Proteus and Endymion.


Nine Months Ended September 30, 2019
Total revenues Total operating expenses Operating income Net income
Statements of Income
Amberjack$235  $54  $181  $182  
Mars212  80  132  133  
Bengal59  23  36  36  
Explorer (1)
159  64  95  73  
Colonial (2)
442  234  208  136  
Poseidon96  26  70  63  
Other (3)
130  76  54  47  

(1) Our additional interest in Explorer was acquired on June 6, 2019. Explorer's total revenues, total operating expenses and operating income (on a 100% basis) were $344 million, $145 million and $199 million, respectively.
(2) Our additional interest in Colonial was acquired on June 6, 2019. Colonial's total revenues, total operating expenses and operating income (on a 100% basis) were $1,050 million, $520 million and $530 million, respectively.
(3) Included in Other is the activity associated with our investments in Permian Basin, LOCAP, Proteus and Endymion.

Three Months Ended September 30, 2018
Total revenues Total operating expenses Operating income Net income
Statements of Income
Amberjack$83  $18  $65  $65  
Mars69  26  43  43  
Bengal18   11  11  
Poseidon28  10  18  16  
Other (1)
37  18  19  17  
(1) Included in Other is the activity associated with our investments in Permian Basin, LOCAP, Proteus and Endymion.
Nine Months Ended September 30, 2018
Total revenues Total operating expenses Operating income Net income
Statements of Income
Amberjack (1)
$123  $28  $95  $95  
Mars178  69  109  109  
Bengal51  21  30  30  
Poseidon84  27  57  52  
Other (2)
112  48  64  57  

(1) Our interest in Amberjack was acquired on May 11, 2018. Amberjack’s total revenues, total operating expenses and operating income (on a 100% basis) were $214 million, $54 million and $160 million, respectively.
(2) Included in Other is the activity associated with our investments in Permian Basin, LOCAP, Proteus and Endymion.