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SHARE-BASED COMPENSATION - Option assumptions and Activity (Details) - Share options - CNY (¥) ¥ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Number of Options
Exercised (in shares)	0	(466,320)	(10,883,580)
Aggregate intrinsic value of options exercised	¥ 0	¥ 11	¥ 255

X

- Definition

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

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