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ACQUISITIONS AND DISPOSITIONS - Equity Investment Transactions Narrative (Details) $ in Millions, $ in Millions	May 29, 2024 CAD ($)	May 29, 2024 USD ($)	May 28, 2024
Rio Bravo
Schedule of Equity Method Investments [Line Items]
Ownership interest (in percent)	25.00%	25.00%	100.00%
Post-closing capital expenditure, amount		$ 150
Whistler Parent JV
Schedule of Equity Method Investments [Line Items]
Ownership interest (in percent)	19.00%	19.00%
Carrying value of investment	$ 487	$ 357
Reduction to property, plant and equipment, net and increase to long-term investments	$ 321	$ 235
Whistler Parent JV \| WhiteWaterI Squared
Schedule of Equity Method Investments [Line Items]
Ownership interest (in percent)	50.60%	50.60%
Whistler Parent JV \| MPLX
Schedule of Equity Method Investments [Line Items]
Ownership interest (in percent)	30.40%	30.40%