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Employee benefit (Details) - CNY (¥) ¥ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Defined Contribution Pension And Other Postretirements Plan Disclosure [Abstract] |  |  |
Employee benefit expenses | ¥ 7,894 | ¥ 4,580 | ¥ 5,694

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- Definition Defined contribution pension and other postretirements plan disclosure. + References No definition available. + Details
Name: | jd_DefinedContributionPensionAndOtherPostretirementsPlanDisclosureAbstract
Namespace Prefix: | jd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
Name: | us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration