STOCK INCENTIVE PLANS - Schedule of Certain Information Related to Restricted Stock Units (Details) - Restricted Stock [Member] - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 17	$ 13
Tax benefit related to stock-based compensation expense	4	3
Fair value of units vested	$ 16	$ 4

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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