The number of tranches share-based compensation award granted.

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Number of other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan), adjusted according to the actual performance during the period.

+ References

No definition available.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were adjusted according to performance.

+ References

No definition available.

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- Definition

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

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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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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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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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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- Definition

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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No definition available.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit 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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No definition available.

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

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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- Definition

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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No definition available.

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Percentage of vesting of award under share-based payment arrangement.

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SHARE-BASED COMPENSATION - Nonvested restricted stocks (Details) ¥ in Millions	12 Months Ended
	Dec. 31, 2020 CNY (¥) tranche shares	Dec. 31, 2020 CNY (¥) $ / shares	Dec. 31, 2019 CNY (¥) tranche shares	Dec. 31, 2018 CNY (¥) tranche shares
Restricted stocks
Number of Restricted Stocks
Nonvested restricted stocks outstanding at the beginning of the period (in shares)	10,245,390
Granted (in shares)	493,407
Forfeited (in shares)	(1,671,111)
Vested (in shares)	(1,407,675)
Adjusted for performance conditions (in shares)	(564,603)
Nonvested restricted stocks outstanding at the end of the period (in shares)	7,095,408		10,245,390
Weighted Average Grant Date Fair Value
Nonvested restricted stocks outstanding at the beginning of the period (in dollars per shares) \| $ / shares		$ 9.87
Granted (in dollars per shares) \| $ / shares		32.74
Forfeited (in dollars per shares) \| $ / shares		8.45
Vested (in dollars per shares) \| $ / shares		11.41
Adjusted for performance conditions (in dollars per share) \| $ / shares		5.93
Nonvested restricted stocks outstanding at the end of the period (in dollars per shares) \| $ / shares		$ 11.80
Total unrecognized compensation expense \| ¥	¥ 455	$ 455
Weighted-average period for recognition of unrecognized compensation costs	3 years 4 months 28 days
Total fair value of nonvested restricted stocks, vested \| ¥	¥ 368		¥ 443	¥ 183
Restricted stocks \| Performance Condition
Share based compensation
Number of tranche \| tranche	10		10	10
Number of Restricted Stocks
Granted (in shares)	0		221,712	661,973
Restricted stocks \| Performance Condition \| Second anniversary of the stated vesting commencement date
Share based compensation
Share-based payment award, vesting percentage	50.00%
Restricted stocks \| Performance Condition \| Vesting ratably over the following two years
Share based compensation
Share-based payment award, vesting percentage	50.00%
Period for remaining percentage vested	2 years
Share options
Weighted Average Grant Date Fair Value
Total unrecognized compensation expense \| ¥	¥ 0	$ 0