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RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Sep. 25, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other comprehensive income (loss) before reclassification, risk-management assets/liabilities	$ 12		$ 107	$ 86	$ 57
Senior Notes | Magellan Acquisition
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Debt, face amount						$ 5,250
Treasury Lock
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other comprehensive income (loss) before reclassification, risk-management assets/liabilities	43
Treasury Lock | Cash Flow Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative notional amount, new contracts		$ 1,100
Derivative, notional amount settled	1,100
Forward contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other comprehensive income (loss) before reclassification, risk-management assets/liabilities	44
Interest-rate contracts | Forward contracts | Cash Flow Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, notional amount settled	$ 400

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