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Equity Method Investments (Tables)
6 Months Ended
Jun. 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:

June 30, 2019December 31, 2018
OwnershipInvestment AmountOwnershipInvestment Amount
Amberjack – Series A / Series B75.0% / 50.0%  $441 75.0% / 50.0%  $458 
Mars71.5%  162 71.5%  169 
Bengal50.0%  84 50.0%  82 
Permian Basin50.0%  79 50.0%  72 
LOCAP41.48%  41.48%  
Explorer (1)
38.59%  92 12.62%  — 
Poseidon36.0%  — 36.0%  — 
Colonial (1)
16.125%  30 6.0%  — 
Proteus10.0%  16 10.0%  16 
Endymion10.0%  18 10.0%  18 
$930 $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 June 30,Six Months Ended June 30,
2019201820192018
Amberjack (1)
$31 $16 $63 $16 
Mars29 21 58 46 
Bengal10 10 
Explorer (2)
— — 
Colonial (2)
— — 
Poseidon (3)
— — — 
Other (4)
10 
$80 $48 $150 $88 
(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 is pro-rated based on the number of days in which the Partnership owned and accounted for the investment under the equity method of accounting.

Three Months Ended June 30, 2019
Total revenues Total operating expenses Operating income Net income
Statements of Income
Amberjack$74 $17 $57 $58 
Mars67 26 41 42 
Bengal19 10 10 
Explorer (1)
37 13 24 18 
Colonial (2)
88 44 44 27 
Poseidon34 26 23 
Other (3)
56 37 19 17 
(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 $133 million, $48 million and $85 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 $325 million, $164 million and $161 million, respectively.
(3) Included in Other is the activity associated with our investments in Permian Basin, LOCAP, Proteus and Endymion.


Six Months Ended June 30, 2019
Total revenues Total operating expenses Operating income Net income
Statements of Income
Amberjack$155 $36 $119 $120 
Mars130 48 82 83 
Bengal37 16 21 21 
Explorer (1)
37 13 24 18 
Colonial (2)
88 44 44 27 
Poseidon65 17 48 43 
Other (3)
86 55 31 26 

(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 $222 million, $94 million and $128 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 $696 million, $330 million and $366 million, respectively.
(3) Included in Other is the activity associated with our investments in Permian Basin, LOCAP, Proteus and Endymion.

Three Months Ended June 30, 2018
Total revenues Total operating expenses Operating income Net income
Statements of Income
Amberjack (1)
$40 $10 $30 $30 
Mars52 22 30 30 
Bengal18 11 11 
Poseidon27 19 17 
Other (2)
39 15 24 21 
(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 $70 million, $17 million and $53 million, respectively.
(2) Included in Other is the activity associated with our investments in Permian Basin, LOCAP, Proteus and Endymion.

Six Months Ended June 30, 2018
Total revenues Total operating expenses Operating income Net income
Statements of Income
Amberjack (1)
$40 $10 $30 $30 
Mars109 43 66 66 
Bengal33 14 19 19 
Poseidon56 17 39 36 
Other (2)
75 30 45 40 

(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 $132 million, $36 million and $96 million, respectively.
(2) Included in Other is the activity associated with our investments in Permian Basin, LOCAP, Proteus and Endymion.