SHARE-BASED COMPENSATION PLANS (Details - Cash-settled Awards) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash paid to settle awards	$ 63	$ 82	$ 104
Compensation expense	$ 274	$ 314	$ 337
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of vested but unsettled RSUs	1,151,380	1,231,185	1,634,610	595,250

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

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Aggregate cash paid by the entity during the period to settle equity instruments granted under equity-based payment arrangements.

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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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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