The amount of assessable profits subject to a lowered tax rate.

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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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Percentage of preferential tax rate applicable to the entity under the preferential tax treatment.

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- Definition

Minimum percentage of shares in FIE to be held directly by the foreign investor, considered for reduced withholding income tax rate.

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Percentage of withholding income tax rate applicable to the entity.

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- Definition

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 6.I.Fact.4)
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319

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- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
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TAXATION (Details) ¥ in Thousands, $ in Thousands				12 Months Ended
TAXATION (Details) ¥ in Thousands, $ in Thousands	Apr. 01, 2018 HKD ($)	Jan. 01, 2010	Mar. 16, 2007	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)
Income Tax Disclosure [Line Items]
Income tax rate (as a percent)				25.00%	25.00%	25.00%
Net operating loss carry forwards \| ¥				¥ 8,625,584	¥ 7,222,966	¥ 5,537,754
High and New Technology Enterprises ("HNTE") \| Dada Glory Network Technology (Shanghai) Co., Ltd. ("Dada Glory")
Income Tax Disclosure [Line Items]
Preferential tax rate (as a percent)				15.00%	15.00%	15.00%
High and New Technology Enterprises ("HNTE") \| Shanghai JD Daojia Yuanxin Information Technology Co., Ltd. ("Shanghai JDDJ")
Income Tax Disclosure [Line Items]
Preferential tax rate (as a percent)				15.00%	15.00%	15.00%
Hong Kong
Income Tax Disclosure [Line Items]
Income tax rate (as a percent)	16.50%	16.50%
Hong Kong \| First HK dollar 2,000 of profits of corporations
Income Tax Disclosure [Line Items]
Income tax rate (as a percent)	8.25%
Amount of assessable profits under lowered tax rate \| $	$ 2,000
Mainland China
Income Tax Disclosure [Line Items]
Income tax rate (as a percent)			25.00%
Withholding tax rate (as a percent)				10.00%
Mainland China \| High and New Technology Enterprises ("HNTE")
Income Tax Disclosure [Line Items]
Preferential tax rate (as a percent)			15.00%
Mainland China \| If the foreign investor owns directly at least 25% of the shares of the FIE
Income Tax Disclosure [Line Items]
Minimum percentage of shares in FIE to be held directly by the foreign investor				25.00%
Mainland China \| If the foreign investor owns directly at least 25% of the shares of the FIE \| Maximum
Income Tax Disclosure [Line Items]
Withholding tax rate (as a percent)				5.00%