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Segment Disclosures (Tables)
 12 Months Ended
Dec. 31, 2022
Segment Reporting [Abstract]  
Reconciliation of Modified EBITDA to Net income (loss) [Table Text Block]
The following table reflects the reconciliation of Modified EBITDA to Net income (loss) as reported in our Consolidated Statement of Income:
Year Ended December 31,
202220212020
(Millions)
Modified EBITDA by segment:
Transmission & Gulf of Mexico$2,674 $2,621 $2,379 
Northeast G&P1,796 1,712 1,489 
West1,211 961 947 
Gas & NGL Marketing Services (1)(40)22 51 
Other434 178 (15)
6,075 5,494 4,851 
Accretion expense associated with asset retirement obligations for nonregulated operations(51)(45)(35)
Depreciation and amortization expenses(2,009)(1,842)(1,721)
Impairment of goodwill— — (187)
Equity earnings (losses)637 608 328 
Impairment of equity-method investments— — (1,046)
Other investing income (loss) – net16 7 8 
Proportional Modified EBITDA of equity-method investments(979)(970)(749)
Interest expense(1,147)(1,179)(1,172)
(Provision) benefit for income taxes(425)(511)(79)
Net income (loss)$2,117 $1,562 $198 
____________
(1)    Modified EBITDA for 2022, 2021, and 2020, includes charges of $161 million, $15 million, and $17 million respectively, associated with lower of cost or net realizable value adjustments to our inventory. These charges are reflected in Product Sales or Product costs in our Consolidated Statement of Income (see Note 1 – General, Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies). Net unrealized commodity-related derivatives gains of $47 million in 2022 and $0 in 2021 and 2020 are reflected in Net processing commodity expenses.
Reconciliation of revenue from segment to consolidated [Table Text Block]
The following table reflects the reconciliation of Segment revenues to Total revenues as reported in the Consolidated Statement of Income and Other financial information:
Transmission & Gulf of MexicoNortheast G&PWestGas & NGL Marketing Services (1)OtherEliminationsTotal
(Millions)
2022
Segment revenues:
Service revenues
External
$3,461 $1,613 $1,443 $3 $16 $— $6,536 
Internal
118 41 99 — 8 (266)— 
Total service revenues3,579 1,654 1,542 3 24 (266)6,536 
Total service revenues – commodity consideration64 14 182 — — — 260 
Product sales
External
228 28 145 4,052 103 — 4,556 
Internal
176 106 696 (518)603 (1,063)— 
Total product sales404 134 841 3,534 706 (1,063)4,556 
Net gain (loss) on commodity derivatives
Realized— — (4)17 (104)— (91)
Unrealized— — — (321)25 — (296)
Total net gain (loss) on commodity derivatives (2)— — (4)(304)(79)— (387)
Total revenues$4,047 $1,802 $2,561 $3,233 $651 $(1,329)$10,965 
Other financial information:
Additions to long-lived assets
$1,420 $261 $1,507 $4 $406 $— $3,598 
Proportional Modified EBITDA of equity-method investments
193 654 132 — — — 979 
2021
Segment revenues:
Service revenues
External$3,310 $1,490 $1,178 $3 $20 $— $6,001 
Internal75 38 70 — 12 (195)— 
Total service revenues3,385 1,528 1,248 3 32 (195)6,001 
Total service revenues – commodity consideration52 7 179 — — — 238 
Product sales
External231 13 60 4,094 138 — 4,536 
Internal118 86 583 198 195 (1,180)— 
Total product sales349 99 643 4,292 333 (1,180)4,536 
Net gain (loss) on commodity derivatives
Realized— — (44)25 (20)— (39)
Unrealized— — — (109)— — (109)
Total net gain (loss) on commodity derivatives (2)— — (44)(84)(20)— (148)
Total revenues$3,786 $1,634 $2,026 $4,211 $345 $(1,375)$10,627 
Other financial information:
Additions to long-lived assets
$861 $164 $209 $1 $620 $— $1,855 
Proportional Modified EBITDA of equity-method investments
183 682 105 — — — 970 
Transmission & Gulf of MexicoNortheast G&PWestGas & NGL Marketing Services (1)OtherEliminationsTotal
(Millions)
2020
Segment revenues:
Service revenues
External$3,207 $1,416 $1,248 $32 $21 $— $5,924 
Internal50 49 24 — 13 (136)— 
Total service revenues3,257 1,465 1,272 32 34 (136)5,924 
Total service revenues – commodity consideration21 7 101 — — — 129 
Product sales
External144 16 20 1,491 — — 1,671 
Internal47 41 132 111 — (331)— 
Total product sales191 57 152 1,602 — (331)1,671 
Net gain (loss) on commodity derivatives
Realized— — (2)(3)— — (5)
Unrealized— — — — — — — 
Total net gain (loss) on commodity derivatives (2)— — (2)(3)— — (5)
Total revenues$3,469 $1,529 $1,523 $1,631 $34 $(467)$7,719 
Other financial information:
Additions to long-lived assets
$706 $137 $318 $— $122 $— $1,283 
Proportional Modified EBITDA of equity-method investments
166 473 110 — — — 749 
______________
(1)    See Note 1 – General, Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies.
(2)    We record transactions that qualify as derivatives at fair value with changes in fair value recognized in earnings in the period of change and characterized as unrealized gains or losses. Gains and losses on derivatives held for energy trading purposes are presented on a net basis in revenue.
Total assets and equity method investments by reporting segment [Table Text Block]
Segment assets include Investments, Property, plant, and equipment – net, and Intangible assets – net of accumulated amortization. The following table reflects segment assets and equity-method investments by reportable segments:
Segment AssetsEquity-Method Investments
December 31, 2022December 31, 2021December 31, 2022December 31, 2021
(Millions)
Transmission & Gulf of Mexico$17,795 $17,142 $629 $602 
Northeast G&P13,539 13,861 3,566 3,681 
West10,710 9,698 843 838 
Gas & NGL Marketing Services130 294 — — 
Other 1,143 792 10 — 
Total 43,317 41,787 $5,048 $5,121 
Total current assets3,797 4,549 
Regulatory assets, deferred charges, and other1,319 1,276 
Total assets$48,433 $47,612