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DESCRIPTION OF THE BUSINESS AND BASIS OF PRESENTATION - Summarized Income Statement Data (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Schedule of Equity Method Investments [Line Items]
Operating revenues	$ 244		$ 224		$ 484	$ 444
Net Income	100	$ 100	94	$ 84	200	178
Equity method investment, non-consolidated investees
Schedule of Equity Method Investments [Line Items]
Operating revenues	198		199		412	410
Operating expenses	94		94		188	188
Net Income	$ 91		$ 91		$ 194	$ 201

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- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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