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Lines of credit and loan facilities (Details) | Dec. 31, 2017 CNY (¥)
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Lines of credit and loan facilities |
Outstanding for the liquidity loans | ¥ 0
Amount reserved for the issuance of bank acceptance | 18,762,657,000
Amount reserved for bank guarantee | 605,713,000
Amount outstanding for other facilities | 2,631,000
Unsecured revolving lines of credit |
Lines of credit and loan facilities |
Maximum borrowing capacity under facility | ¥ 39,924,280,000

X
- Definition Represents amount of line of credit reserved for the bank guarantee. + References No definition available. + Details
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Namespace Prefix: | jd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of line of credit outstanding for other facilities. + References No definition available. + Details
Name: | jd_LineOfCreditOutstandingOtherFacilities
Namespace Prefix: | jd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lines of credit reserved for issuances of bank acceptance. + References No definition available. + Details
Name: | jd_LineOfCreditReservedForIssuancesOfBankAcceptance
Namespace Prefix: | jd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value of the amount outstanding under the credit facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13476-108611 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition 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. + References No definition available. + Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |