SEGMENT INFORMATION - Schedule of Other Assets (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Segment Reporting Information [Line Items]
Cash and cash equivalents	$ 29	$ 21
Accounts receivable	491	680
Property, plant and equipment	8,097	9,913
Unamortized debt expense	32	34
Right-of-use lease assets	144	154
Other long-term assets (1)	1,050	663
TOTAL ASSETS	10,398	$ 11,991	$ 12,937
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Cash and cash equivalents	29		3
Accounts receivable	0		1
Prepayments	15		12
Other current assets	1		0
Property, plant and equipment	23		19
Unamortized debt expense	14		18
Right-of-use lease assets	47		55
Non-qualified retirement plan	2		2
Other long-term assets (1)	20		15
TOTAL ASSETS	$ 151		$ 125