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Investments in Unconsolidated Entities (Tables)
 12 Months Ended
Dec. 31, 2023
Equity Method Investments and Joint Ventures [Abstract]  
Schedule of Investments in and Summarized Financial Information for Entities Accounted for under the Equity Method of Accounting
Our investments in unconsolidated entities consisted of the following (in millions, except percentage data):

Ownership
Interest at December 31,
2023
Investment Balance
December 31,
Entity (1)
Type of Operation20232022
BridgeTex Pipeline Company, LLC (“BridgeTex”)Crude Oil Pipeline20%$363 $403 
Capline Pipeline Company LLC (“Capline”)
Crude Oil Pipeline54%535 539 
Diamond Pipeline LLC
Crude Oil Pipeline50%450 460 
Eagle Ford Pipeline LLC
Crude Oil Pipeline50%370 371 
Eagle Ford Terminals Corpus Christi LLC
Crude Oil Terminal and Dock50%116 118 
OMOG JV LLC (“OMOG”) (2)
Crude Oil Pipeline—%— 211 
Saddlehorn Pipeline Company, LLC
Crude Oil Pipeline30%192 197 
White Cliffs Pipeline, LLCCrude Oil Pipeline36%138 150 
Wink to Webster Pipeline LLC (“W2W Pipeline”) (3)
Crude Oil Pipeline16%380 357 
Other investments
276 278 
Total Investments in Unconsolidated Entities$2,820 $3,084 
(1)The financial results from these entities are reported in our Crude Oil segment.
(2)In the third quarter of 2023, we acquired the remaining 43% interest in OMOG. We now reflect OMOG and its subsidiaries as consolidated subsidiaries in our Consolidated Financial Statements. See Note 7 for additional information.
(3)Although we own less than 20% of W2W Pipeline, we use the equity method to account for the investment because we believe we have significant influence over the financial and operating decisions of the company.
Combined summarized financial information for all of our unconsolidated entities is shown in the tables below (in millions). None of our unconsolidated entities have noncontrolling interests.

December 31,
20232022
Current assets$528 $471 
Noncurrent assets$7,194 $7,579 
Current liabilities$476 $252 
Noncurrent liabilities$5 $8 

Year Ended December 31,
202320222021
Revenues$1,667 $1,726 $1,320 
Operating income$921 $1,004 $505 
Net income$947 $1,011 $506