SUPPLEMENTAL FINANCIAL INFORMATION - Schedule of Other Income (Expense) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Net interest and investment income (expense)	$ 13	$ (2)
Equity method investment income	4	3
Change in fair value of assumed obligation	(13)	0
Other items, net	4	25
Total other income (expense) – net	$ 8	$ 26

Other Items, Income (Expense), Net

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Amount of gain (loss), recognized immediately as component of net periodic benefit (cost) credit, for change in value of benefit obligation or plan assets from experience different from that assumed, change in actuarial assumption, or consequence of temporarily deviating from substantive plan. Includes, but is not limited to, amount in excess of 10 percent of greater of fair value of plan assets or benefit obligation.

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- Definition

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

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Amount after accretion (amortization) of discount (premium), and investment expense, of interest income and dividend income on nonoperating securities.

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Amount of income (expense) related to nonoperating activities, classified as other.

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