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v3.21.1

LOANS AND BORROWINGS - Type of short-term borrowings (Details) - CNY (¥) ¥ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Short-term borrowings by type |  |
Unsecured short-term loans and borrowings | ¥ 221,436 | ¥ 80,000
Secured short-term loans and borrowings | 1,009,320 | 317,213
Short-term borrowings | ¥ 1,230,756 | ¥ 397,213

X
- Definition Carrying value as of the balance sheet date of the collateralized debt obligations due within one year or the normal operating cycle, if longer. + References No definition available. + Details
Name: | gds_SecuredShortTermDebt
Namespace Prefix: | gds_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition This concept does not have any references. + References No definition available. + Details
Name: | gds_ShortTermDebtByTypeUnsecuredAndSecuredAbstract
Namespace Prefix: | gds_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Carrying amount as of the balance sheet date of the uncollateralized debt obligations due within one year or the normal operating cycle, if longer. + References No definition available. + Details
Name: | gds_UnsecuredShortTermDebt
Namespace Prefix: | gds_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(a)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(1)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(13)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
Name: | us-gaap_ShortTermBorrowings
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant