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DESCRIPTION OF THE BUSINESS AND BASIS OF PRESENTATION - Earnings from Equity Method Investees (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Schedule of Equity Method Investments [Line Items]
Earnings from equity method investees	$ 34	$ 40	$ 101	$ 125
NEXUS
Schedule of Equity Method Investments [Line Items]
Earnings from equity method investees	18	16	48	47
Vector
Schedule of Equity Method Investments [Line Items]
Earnings from equity method investees	7	9	28	29
Millennium
Schedule of Equity Method Investments [Line Items]
Earnings from equity method investees	$ 9	$ 15	$ 25	$ 49

X

- Definition

Amount of income (loss) for proportionate share of equity method investee's income (loss).

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