GOODWILL - KEY ASSUMPTIONS USED FOR VALUE-IN-USE CALCULATIONS - Narratives (Details) - Railroad business [member]	12 Months Ended
Dec. 31, 2021 CNY (¥)
Disclosure of goodwill key assumptions used for value-in-use calculation [line items]
Impairment loss recognized against goodwill due to lower budgeted growth rate	¥ 0
Impairment loss recognized against goodwill due to higher estimated pre-tax discount rate	¥ 0
Maximum [member]
Disclosure of goodwill key assumptions used for value-in-use calculation [line items]
Percentage by which budgeted growth rate used in value-in-use calculation lower than management estimates	10.00%
Percentage by which estimated pre-tax discount rate applied to the discounted cash flows is higher than management's estimates	1.00%

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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- Definition

The amount of impairment loss recognised in profit or loss for goodwill applied to the discounted cash flows.

+ References

No definition available.

+ Details

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- Definition

The amount of impairment loss recognised in profit or loss for goodwill in the value-in-use calculation.

+ References

No definition available.

+ Details

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- Definition

Percentage by which budgeted growth rate used in the value-in-use calculation is lower than management's estimates.

+ References

No definition available.

+ Details

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- Definition

Percentage by which estimated pre-tax discount rate applied is higher than management's estimates.

+ References

No definition available.

+ Details

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