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CONSOLIDATED ENTITIES AND EQUITY METHOD INVESTMENTS (Tables) | 12 Months Ended
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Dec. 31, 2021
Equity Method Investments and Joint Ventures [Abstract] |
Equity method investments | The carrying amounts of Southern Company Gas' equity method investments at December 31, 2021 and 2020 and related earnings (loss) from those investments for the years ended December 31, 2021, 2020, and 2019 were as follows:
Investment Balance | December 31, 2021 |  | December 31, 2020
| (in millions)
SNG(a) | $ | 1,129 |  |  | $ | 1,167 |
PennEast Pipeline(b) | 11 |  |  | 91 |
Other | 33 |  |  | 32 |
Total | $ | 1,173 |  |  | $ | 1,290 |
(a)Decrease primarily relates to the continued amortization of deferred tax assets established upon acquisition, as well as distributions in excess of earnings. (b)Investment balance at December 31, 2021 reflects pre-tax impairment c har ges totaling $84 million recorded during 2021. See "PennEast Pipeline Project" herein for additional information, including the September 2021 cancellation of the project.
Equity method investments related income |
Earnings (Loss) from Equity Method Investments | 2021 |  | 2020 |  | 2019
| (in millions)
SNG | $ | 127 |  |  | $ | 129 |  |  | $ | 141 |
Atlantic Coast Pipeline(a)(b) | — |  |  | 3 |  |  | 13 |
PennEast Pipeline(a)(c) | (81) |  |  | 7 |  |  | 6 |
Other(d) | 4 |  |  | 2 |  |  | (3) |
Total | $ | 50 |  |  | $ | 141 |  |  | $ | 157 |
(a)Earnings primarily result from AFUDC equity recorded by the project entity. (b)In March 2020, Southern Company Gas completed the sale of its interest in Atlantic Coast Pipeline. See Note 15 under "Southern Company Gas" for additional information. (c)For 2021, includes pre-tax impairment charges totaling $84 million. See "PennEast Pipeline Project" herein for additional information, including the September 2021 cancellation of the project. (d)In March 2020, Southern Company Gas completed the sale of its interest in Pivotal LNG. See Note 15 under "Southern Company Gas" for additional information.

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- Definition Tabular disclosure of equity method investments including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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- Definition Tabular disclosure of the detailed components of other nonoperating income. May include methodology, assumptions and amounts for: (a) dividends, (b) interest on securities, (c) profits on securities (net of losses), and (d) miscellaneous other income items. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 + Details
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