SEGMENT INFORMATION - Schedule of Other Assets (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Segment Reporting Information [Line Items]
Cash and cash equivalents	$ 15	$ 21
Accounts receivable	544	680
Property, plant and equipment	7,670	9,913
Unamortized debt expense	32	34
Right-of-use lease assets	136	154
Deferred tax assets	849	238
Other long-term assets	104	96
TOTAL ASSETS	9,850	$ 11,991	$ 13,001
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Cash and cash equivalents	15		25
Accounts receivable	0		1
Prepayments	15		11
Property, plant and equipment	24		21
Unamortized debt expense	13		17
Right-of-use lease assets	48		53
Non-qualified retirement plan	3		3
Deferred tax assets	2		0
Other long-term assets	25		19
TOTAL ASSETS	$ 145		$ 150