SHARE-BASED COMPENSATION - Stock Options Activity (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Number of Options
Outstanding, beginning balance (in shares)	0
Assumed (in shares)	249,861
Granted (in shares)	0	0	0
Exercised (in shares)	(4,000)
Forfeited or expired (in shares)	0
Outstanding, ending balance (in shares)	245,861	0
Weighted-Average Exercise Price
Outstanding, beginning balance (in dollars per share)	$ 0
Assumed (in dollars per share)	19.45
Granted (in dollars per share)	0
Exercised (in dollars per share)	19.45
Forfeited or expired (in dollars per share)	0
Outstanding, ending balance (in dollars per share)	$ 19.45	$ 0
Stock Options Additional Disclosures
Outstanding, Weighted-Average Remaining Contractual Term	3 years 1 month 6 days
Outstanding, Aggregate Intrinsic Value	$ 7
Exercisable, number of options (in shares)	34,856
Exercisable, Weighted-Average Exercise Price (in dollars per share)	$ 19.45
Exercisable, Weighted-Average Remaining Contractual Term	3 years 1 month 6 days
Exercisable, Aggregate Intrinsic Value	$ 1

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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The addition or reduction in the number of reserved shares that could potentially be issued under the option plan attributable to reasons other than grants, exercises, forfeitures, and expirations during the reporting period.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Weighted average price at which grantees could acquire or could have acquired the underlying shares with respect to any other type of change in shares reserved for issuance.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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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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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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