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Investing Activities (Tables)
12 Months Ended
Dec. 31, 2023
Investments [Abstract]  
Investments [Table Text Block]
 
Ownership Interest at December 31, 2023
December 31,
 20232022
 (Millions)
Equity method:
Appalachia Midstream Investments(1)$2,886 $2,975 
Blue Racer50%398 383 
OPPL50%387 386 
Discovery60%361 345 
Gulfstream50%210 220 
Laurel Mountain69%184 205 
RMM (2)
100%— 395 
OtherVarious188 139 
4,614 5,048 
Other23 17 
$4,637 $5,065 
___________
(1)Includes equity-method investments in multiple gathering systems in the Marcellus Shale region with an approximate average 66 percent interest.
(2)RMM is a wholly owned subsidiary as of November 30, 2023. See Note 3 – Acquisitions and Divestitures.
Contributions [Table Text Block]
Purchases of and contributions to equity-method investments
We generally fund our portion of significant expansion or development projects of these investees through additional capital contributions. These transactions increased the carrying value of our investments and included:
Year Ended December 31,
 202320222021
 (Millions)
Appalachia Midstream Investments$59 $83 $84 
Discovery40 41 — 
Aux Sable Liquid Products LP
38 — — 
Cardinal Pipeline Company, LLC— 16 — 
Gulfstream— 14 26 
Other12 
$141 $166 $115 
Investment Income
Other investing income (loss) – net
The following table presents certain items reflected in Other investing income (loss) – net in our Consolidated Statement of Income:
Year Ended December 31,
202320222021
(Millions)
Interest income
$79 $15 $
Gain on remeasurement of RMM investment (Note 3)
30 — — 
Other
(1)— 
Other investing income (loss) – net$108 $16 $
Dividends and distributions [Table Text Block]
Dividends and distributions
The organizational documents of entities in which we have an equity-method investment generally require distribution of available cash to members on at least a quarterly basis. These transactions reduced the carrying value of our investments and included:
Year Ended December 31,
202320222021
 (Millions)
Appalachia Midstream Investments$405 $415 $433 
Gulfstream98 89 90 
Blue Racer
62 49 47 
OPPL
56 34 26 
RMM49 52 45 
Discovery49 49 44 
Laurel Mountain
42 112 33 
Other35 65 39 
$796 $865 $757 
Summarized Financial Position and Results of Operations of Equity Method Investments [Table Text Block]
Summarized Financial Position and Results of Operations of All Equity-Method Investments
 December 31,
 20232022
 (Millions)
Assets (liabilities):
Current assets
$669 $964 
Noncurrent assets
11,058 12,701 
Current liabilities
(358)(632)
Noncurrent liabilities
(3,619)(3,789)
 Year Ended December 31,
 202320222021
 (Millions)
Gross revenue$3,714 $5,520 $4,688 
Operating income966 1,268 1,191 
Net income748 1,102 1,006