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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

X

- 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

X

- 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