REVENUE - Activity in Uncollectable Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Deferred for recovery	$ (15)	$ 11	$ 12
Increase (decrease) in allowance for credit loss,	77
Customer Receivables:
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	137	159	164
Charged to income	8	59	54
Charged to other accounts	34	62	42
Write-offs	(115)	(143)	(101)
Ending balance	64	137	159
Other Receivables:
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	11	10	26
Charged to income	7	4	3
Charged to other accounts	(1)	4	3
Write-offs	(2)	(7)	(22)
Ending balance	$ 15	$ 11	$ 10