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Investments - Short-term Investments - Additional information (Detail) ¥ in Millions, $ in Millions | 6 Months Ended
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Jun. 30, 2020 CNY (¥) | Jun. 30, 2020 USD ($) | Jun. 30, 2019 CNY (¥)
Schedule of Investments [Line Items] |  |  |
Investment interest income | ¥ 2,753 | $ 390 | ¥ 2,277
Short-term Investments |  |  |
Schedule of Investments [Line Items] |  |  |
Investment interest income | ¥ 2,500 | $ 351 | ¥ 1,800

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- Definition Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7(b)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 + Details
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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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- Details
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