Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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STOCK COMPENSATION - ADDITIONAL INFORMATION (Details) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2016 shares
Schedule of Share based Compensation Arrangements by Share based Payment Award, Equity Instruments, Other Than Options, Restricted Stock Units [Line Items]
Conversion ratio for RSUs and restricted stock	3.09
Intrinsic value of options exercised \| $	$ 16	$ 3	$ 37
Total fair value of share vested during the period \| $	$ 76	$ 54	$ 44
Weighted average remaining contractual life (in years)	5 years 7 months 6 days
Weighted average remaining contractual term of exercisable options (in years)	4 years 2 months 12 days
Equity Incentive Plan 2016
Schedule of Share based Compensation Arrangements by Share based Payment Award, Equity Instruments, Other Than Options, Restricted Stock Units [Line Items]
Authorized grants under the plan (in shares) \| shares				25.0
Number of shares available for grant (in shares) \| shares	20.0
Tax Year 2016 \| Key Employee
Schedule of Share based Compensation Arrangements by Share based Payment Award, Equity Instruments, Other Than Options, Restricted Stock Units [Line Items]
Cap on restricted stock or RSU (in shares) \| shares	1.0
Nonqualified Plan
Schedule of Share based Compensation Arrangements by Share based Payment Award, Equity Instruments, Other Than Options, Restricted Stock Units [Line Items]
Number of unvested stock options (in shares) \| shares	1.0
Unamortized compensation costs \| $	$ 9
Weighted average period for cost recognition	1 year 9 months 18 days
Restricted Stock Units (RSUs)
Schedule of Share based Compensation Arrangements by Share based Payment Award, Equity Instruments, Other Than Options, Restricted Stock Units [Line Items]
Unamortized compensation costs \| $	$ 42
Weighted average period for cost recognition	2 years