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Equity Method Investments (Tables)
 12 Months Ended
Dec. 31, 2020
Equity Method Investments and Joint Ventures [Abstract]  
Schedule of Equity Investments in Affiliates Equity method investments comprise the following as of the dates indicated:  
December 31,
20202019
OwnershipAmountOwnershipAmount
Mattox (1)
79%$163 —$— 
Amberjack – Series A / Series B
75.0% / 50.0%
382 
75.0% / 50.0%
426 
Mars71.5%152 71.5%161 
Bengal50.0%88 50.0%88 
Permian Basin50.0%83 50.0%91 
LOCAP41.48%12 41.48%9 
Explorer (2)
38.59%73 38.59%88 
Poseidon 36.0%— 36.0%— 
Colonial (2)
16.125%29 16.125%30 
Proteus10.0%14 10.0%15 
Endymion10.0%17 10.0%18 
$1,013 $926 
(1) Mattox was acquired as part of the April 2020 Transaction. This interest has been accounted for on a prospective basis. See below for additional information.
(2) 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 Table
Earnings from our equity method investments were as follows during the periods indicated:

For the Year Ended December 31,
202020192018
Mattox (1)
$45 $— $— 
Amberjack (2)
102 125 80 
Mars114 126 108 
Bengal18 24 21 
Explorer (3)
44 41 — 
Colonial (3)
75 40 — 
Poseidon (4)
— — 6 
Other (5)
19 17 20 
$417 $373 $235 
(1) We acquired an interest in Mattox in the April 2020 Transaction. The acquisition of this interest has been accounted for prospectively.
(2) We acquired an interest in Amberjack in the May 2018 Acquisition. The acquisition of this interest has been accounted for prospectively.  
(3) We acquired additional interests in Explorer and Colonial in the June 2019 Acquisition. The acquisition of these interests has been accounted for prospectively.
(4) As stated above, the equity method of accounting has been suspended in 2018 for Poseidon and excess distributions are recorded in Other income.
(5) Included in Other is the activity associated with our investments in Permian Basin, LOCAP, Proteus and Endymion.
Summary of Balance Sheet and Income Statement Data for Equity Method Investments
The following tables present aggregated selected balance sheet and income statement data for our equity method investments on a 100% basis. However, during periods in which an acquisition occurs, the selected balance sheet and income statement data reflects activity from the date of the acquisition.
 
For the Year Ended December 31, 2020
Total revenuesTotal operating expensesOperating incomeNet income
Statements of Income
Mattox (1)
$66 $9 $57 $57 
Amberjack280 78 202 201 
Mars259 97 162 163 
Bengal65 30 35 35 
Explorer 329 175 154 119 
Colonial
1,395 660 735 473 
Poseidon147 36 111 105 
Other (2)
220 123 97 88 

As of December 31, 2020
Current assetsNon-current assetsTotal assetsCurrent liabilitiesNon-current liabilitiesEquity (deficit)Total liabilities and equity (deficit)
Balance Sheets
Mattox (1)
$13 $204 $217 $— $12 $205 $217 
Amberjack44 836 880 10 124 746 880 
Mars47 269 316 23 103 190 316 
Bengal33 161 194 7 — 187 194 
Explorer74 537 611 49 459 103 611 
Colonial501 3,105 3,606 245 3,508 (147)3,606 
Poseidon31 176 207 10 238 (41)207 
Other (2)
35 920 955 56 486 413 955 
(1) Our interest in Mattox was acquired in the April 2020 Transaction. Mattox’s total revenues, total operating expenses and operating income (on a 100% basis) were $85 million, $12 million and $73 million, respectively.
(2) Included in Other is the activity associated with our investments in Permian Basin, LOCAP, Proteus and Endymion.
For the Year Ended December 31, 2019
Total revenuesTotal operating expensesOperating incomeNet income
Statements of Income
Amberjack
$315 $73 $242 $243 
Mars282 104 178 179 
Bengal77 30 47 47 
Explorer (1)
258 115 143 111 
Colonial (2)
829 449 380 255 
Poseidon132 35 97 87 
Other (3)
190 108 82 73 

As of December 31, 2019
Current assetsNon-current assetsTotal assetsCurrent liabilitiesNon-current liabilitiesEquity (deficit)Total liabilities and equity (deficit)
Balance Sheets
Amberjack$56 $804 $860 $4 $32 $824 $860 
Mars57 173 230 8 22 200 230 
Bengal35 157 192 6 — 186 192 
Explorer (1)
93 530 623 44 442 137 623 
Colonial (2)
323 2,920 3,243 519 2,873 (149)3,243 
Poseidon30 190 220 16 246 (42)220 
Other (3)
60 917 977 73 469 435 977 
(1) Our interest in Explorer was acquired on June 6, 2019. Explorer total revenues, total operating expenses and operating income (on a 100% basis) was $443 million, $196 million and $247 million, respectively.
(2) Our interest in Colonial was acquired on June 6, 2019. Colonial total revenues, total operating expenses and operating income (on a 100% basis) was $1,437 million, $735 million and $702 million, respectively.
(3) Included in Other is the activity associated with our investments in Permian Basin, LOCAP, Proteus and Endymion.

For the Year Ended December 31, 2018
Total revenuesTotal operating expensesOperating incomeNet income
Statements of Income
Amberjack (1)
$204 $47 $157 $157 
Mars241 87 154 154 
Bengal69 28 41 41 
Poseidon116 35 81 73 
Other (2)
152 67 85 76 
As of December 31, 2018
Current assetsNon-current assetsTotal assetsCurrent liabilitiesNon-current liabilitiesEquity (deficit)Total liabilities and equity (deficit)
Balance Sheets
Amberjack (1)
$46 $846 $892 $4 $4 $884 $892 
Mars53 178 231 5 18 208 231 
Bengal27 156 183 9 — 174 183 
Poseidon19 203 222 16 243 (37)222 
Other (2)
50 876 926 65 456 405 926 
(1) Our interest in Amberjack was acquired on May 11, 2018. Amberjack total revenues, total operating expenses and operating income (on a 100% basis) was $295 million, $74 million and $221 million, respectively.
(2) Included in Other is the activity associated with our investments in Permian Basin, LOCAP, Proteus and Endymion.