LEASES - Supplemental Information Related to Operating Leases (Details) - CNY (¥) ¥ in Millions	6 Months Ended
Jun. 30, 2024	Jun. 30, 2023
Lease cost:
Operating fixed lease cost	¥ 2,085	¥ 2,110
- Amortization of ROU assets	41	41
- Interest on lease liabilities	63	52
Variable lease cost	134	65
Total lease cost	¥ 2,323	¥ 2,268
Other information:
Weighted average remaining lease term, Operating leases (in years)	13 years	13 years
Weighted average remaining lease term, Finance leases (in years)	27 years	28 years
Weighted average discount rate, Operating leases (in %)	6.14%	6.20%
Weighted average discount rate, Finance leases (in %)	4.32%	4.03%

Operating leases other information

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- Definition

Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.

+ References

No definition available.

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- Definition

Amount of interest expense on finance lease liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 842
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-Name Accounting Standards Codification
-Section 55
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Amount of amortization expense attributable to right-of-use asset from finance lease.

+ References

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- Definition

Weighted average discount rate for finance lease calculated at point in time.

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- Definition

Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Amount of lease cost recognized by lessee for lease contract.

+ References

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- Definition

Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

+ References

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- Definition

Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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