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SHARE-BASED COMPENSATION - RSU Activity (Details) - Restricted stock unit expense $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($) $ / shares shares
Number of Shares
Beginning balance (in shares) | shares	8.9
Granted (in shares) | shares	2.4
Vested (in shares) | shares	(0.9)
Forfeited, expired or canceled (in shares) | shares	(1.8)
Ending balance (in shares) | shares	8.6
Weighted-Average Grant Date Fair Value per Share
Beginning balance, weighted-average grant date fair value (in dollars per shares) | $ / shares	$ 9.02
Granted, weighted-average grant date fair value (in dollars per shares) | $ / shares	1.68
Vested, weighted-average grant date fair value (in dollars per shares) | $ / shares	10.48
Forfeited, expired or canceled, weighted-average grant date fair value (in dollars per share) | $ / shares	8.68
Ending balance, weighted-average grant date fair value (in dollars per shares) | $ / shares	$ 6.29
Aggregate Intrinsic Value
Beginning balance | $	$ 27.4
Vested | $	2.0
Ending balance | $	$ 16.8

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Intrinsic value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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