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v2.4.1.9

Notes Payable - Additional Information (Detail) | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |
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Dec. 31, 2014 Unsecured Senior Notes Due Two Thousand Seventeen | Nov. 28, 2012 Unsecured Senior Notes Due Two Thousand Seventeen USD ($) | Dec. 31, 2014 Unsecured Senior Notes Due Two Thousand Twenty Two | Nov. 28, 2012 Unsecured Senior Notes Due Two Thousand Twenty Two USD ($) | Dec. 31, 2014 Unsecured Senior Notes Due Twenty Eighteen | Aug. 06, 2013 Unsecured Senior Notes Due Twenty Eighteen USD ($) | Dec. 31, 2014 Unsecured Senior Notes USD ($) | Dec. 31, 2014 Unsecured Senior Notes CNY | Dec. 31, 2013 Unsecured Senior Notes CNY | Dec. 31, 2012 Unsecured Senior Notes CNY | Nov. 28, 2012 Unsecured Senior Notes Tranche | Dec. 31, 2014 Unsecured Senior Notes Due Twenty Nineteen | Jun. 09, 2014 Unsecured Senior Notes Due Twenty Nineteen USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of tranches issued and sold |  |  |  |  |  |  |  |  |  |  | 2 bidu_NumberOfTranchesOfDebtIssued / us-gaap_DebtInstrumentAxis = bidu_UnsecuredSeniorNotesMember |  |
Debt face amount |  | $ 750,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = bidu_UnsecuredSeniorNotesDueTwoThousandSeventeenMember |  | $ 750,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = bidu_UnsecuredSeniorNotesDueTwoThousandTwentyTwoMember |  | $ 1,000,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = bidu_UnsecuredSeniorNotesDueTwentyEighteenMember |  |  |  |  |  |  | $ 1,000,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = bidu_UnsecuredSeniorNotesDueTwentyNineteenMember
Debt, maturity date | Nov. 28, 2017 |  | Nov. 28, 2022 |  | Aug. 06, 2018 |  |  |  |  |  |  | Jun. 09, 2019 |
Interest rate | 2.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bidu_UnsecuredSeniorNotesDueTwoThousandSeventeenMember |  | 3.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bidu_UnsecuredSeniorNotesDueTwoThousandTwentyTwoMember |  | 3.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bidu_UnsecuredSeniorNotesDueTwentyEighteenMember |  |  |  |  |  |  | 2.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = bidu_UnsecuredSeniorNotesDueTwentyNineteenMember |
Net proceeds from issuance of debt |  |  |  |  |  |  | 990,000,000 us-gaap_ProceedsFromIssuanceOfDebt / us-gaap_DebtInstrumentAxis = bidu_UnsecuredSeniorNotesMember | 6,190,000,000 us-gaap_ProceedsFromIssuanceOfDebt / us-gaap_DebtInstrumentAxis = bidu_UnsecuredSeniorNotesMember | 6,110,000,000 us-gaap_ProceedsFromIssuanceOfDebt / us-gaap_DebtInstrumentAxis = bidu_UnsecuredSeniorNotesMember | 9,330,000,000 us-gaap_ProceedsFromIssuanceOfDebt / us-gaap_DebtInstrumentAxis = bidu_UnsecuredSeniorNotesMember |  |  |
Discount on debt issued |  |  |  |  |  |  | 10,130,000 us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_DebtInstrumentAxis = bidu_UnsecuredSeniorNotesMember | 62,840,000 us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_DebtInstrumentAxis = bidu_UnsecuredSeniorNotesMember |  |  |  |  |
Debt issuance cost |  |  |  |  |  |  | $ 17,670,000 us-gaap_DebtIssuanceCosts / us-gaap_DebtInstrumentAxis = bidu_UnsecuredSeniorNotesMember | 109,630,000 us-gaap_DebtIssuanceCosts / us-gaap_DebtInstrumentAxis = bidu_UnsecuredSeniorNotesMember |  |  |  |  |
Effective interest rate | 2.36%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = bidu_UnsecuredSeniorNotesDueTwoThousandSeventeenMember |  | 3.59%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = bidu_UnsecuredSeniorNotesDueTwoThousandTwentyTwoMember |  | 3.39%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = bidu_UnsecuredSeniorNotesDueTwentyEighteenMember |  |  |  |  |  |  | 3.00%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = bidu_UnsecuredSeniorNotesDueTwentyNineteenMember |

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- Definition The number of tranches for the debt issued by the Company. + References No definition available. + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Details
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- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
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