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LONG-TERM INVESTMENTS - Narrative (Details) $ in Millions, $ in Millions |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Nov. 29, 2022 CAD ($) | Nov. 29, 2022 USD ($) | Aug. 17, 2022 CAD ($) | Aug. 17, 2022 USD ($) | Dec. 30, 2021 CAD ($) | Dec. 31, 2022 CAD ($) | Dec. 31, 2021 CAD ($) | Dec. 31, 2020 CAD ($) | Aug. 16, 2022 | Jun. 06, 2021
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Goodwill of investee |  |  |  |  |  | $ 3,400 | $ 2,500 |  |  |
Amortizable assets of investee |  |  |  |  |  | 1,500 | 730 |  |  |
Dividends received from equity investments |  |  |  |  |  | 2,600 | 2,200 | $ 2,100 |  |
Gain on joint venture merger transaction (Note 13) |  |  | $ 1,100 | $ 832 |  | 1,076 | 0 | 0 |  |
Impairment of equity investments (Note 13) |  |  |  |  |  | 0 | 111 | 2,351 |  |
Loss from equity method investment |  |  |  |  |  | $ (2,056) | $ (1,711) | (1,136) |  |
Woodfibre LNG Limited |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Cash | $ 533 | $ 392 |  |  |  |  |  |  |  |
Noverco Preferred Shares |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Ownership interest (as a percent) |  |  |  |  |  |  | 38.90% |  |  | 38.90%
Gain on joint venture merger transaction (Note 13) |  |  |  |  | $ 303 |  |  |  |  |
PennEast Pipeline Company, LLC |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Ownership interest (as a percent) |  |  |  |  |  | 20.00% |  |  |  |
Impairment of equity investments (Note 13) |  |  |  |  |  |  | $ 111 |  |  |
Equity investment |  |  |  |  |  | $ 0 | $ 12 |  |  |
Steckman Ridge, LP |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Impairment of equity investments (Note 13) |  |  |  |  |  |  |  | 221 |  |
Southeast Supply Header L.L.C. |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Impairment of equity investments (Note 13) |  |  |  |  |  |  |  | 394 |  |
DCP Midstream, LLC |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Ownership interest (as a percent) |  |  |  |  |  | 90.00% |  |  | 50.00% |
Impairment of equity investments (Note 13) |  |  |  |  |  |  |  | 1,700 |  |
Loss from equity method investment |  |  |  |  |  |  |  | $ 324 |  |
Woodfibre LNG Limited |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Ownership interest (as a percent) | 30.00% | 30.00% |  |  |  |  |  |  |  |
Gray Oak Holdings LLC |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Ownership interest (as a percent) |  |  | 58.50% | 58.50% |  |  | 35.00% |  | 22.80% |
DCP LLC |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Ownership interest (as a percent) |  |  | 13.20% | 13.20% |  |  |  |  | 28.30% |

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