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Consolidated Statements Of Comprehensive Income In Thousands, except Share data, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 USD ($) | Dec. 31, 2014 CNY | Dec. 31, 2013 CNY | Dec. 31, 2012 CNY | Dec. 31, 2014 Common Class A and Class B USD ($) | Dec. 31, 2014 Common Class A and Class B CNY | Dec. 31, 2013 Common Class A and Class B CNY | Dec. 31, 2012 Common Class A and Class B CNY | Dec. 31, 2014 Class A Ordinary Shares American Depositary Shares USD ($) | Dec. 31, 2014 Class A Ordinary Shares American Depositary Shares CNY | Dec. 31, 2013 Class A Ordinary Shares American Depositary Shares CNY | Dec. 31, 2012 Class A Ordinary Shares American Depositary Shares CNY
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Online marketing services | $ 7,816,010 us-gaap_AdvertisingRevenue | 48,495,215 us-gaap_AdvertisingRevenue | 31,802,219 us-gaap_AdvertisingRevenue | 22,245,643 us-gaap_AdvertisingRevenue |  |  |  |  |  |  |  |
Others | 89,789 us-gaap_OtherSalesRevenueNet | 557,103 us-gaap_OtherSalesRevenueNet | 141,705 us-gaap_OtherSalesRevenueNet | 60,383 us-gaap_OtherSalesRevenueNet |  |  |  |  |  |  |  |
Total revenues | 7,905,799 us-gaap_SalesRevenueNet | 49,052,318 us-gaap_SalesRevenueNet | 31,943,924 us-gaap_SalesRevenueNet | 22,306,026 us-gaap_SalesRevenueNet |  |  |  |  |  |  |  |
Operating costs and expenses: |  |  |  |  |  |  |  |  |  |  |  |
Cost of revenues | (3,043,781)us-gaap_CostOfGoodsAndServicesSold | (18,885,450)us-gaap_CostOfGoodsAndServicesSold | (11,471,839)us-gaap_CostOfGoodsAndServicesSold | (6,448,545)us-gaap_CostOfGoodsAndServicesSold |  |  |  |  |  |  |  |
Selling, general and administrative | (1,673,298)us-gaap_SellingGeneralAndAdministrativeExpense | (10,382,142)us-gaap_SellingGeneralAndAdministrativeExpense | (5,173,533)us-gaap_SellingGeneralAndAdministrativeExpense | (2,501,336)us-gaap_SellingGeneralAndAdministrativeExpense |  |  |  |  |  |  |  |
Research and development | (1,125,127)us-gaap_ResearchAndDevelopmentExpense | (6,980,962)us-gaap_ResearchAndDevelopmentExpense | (4,106,832)us-gaap_ResearchAndDevelopmentExpense | (2,304,825)us-gaap_ResearchAndDevelopmentExpense |  |  |  |  |  |  |  |
Total operating costs and expenses | (5,842,206)us-gaap_CostsAndExpenses | (36,248,554)us-gaap_CostsAndExpenses | (20,752,204)us-gaap_CostsAndExpenses | (11,254,706)us-gaap_CostsAndExpenses |  |  |  |  |  |  |  |
Operating profit | 2,063,593 us-gaap_OperatingIncomeLoss | 12,803,764 us-gaap_OperatingIncomeLoss | 11,191,720 us-gaap_OperatingIncomeLoss | 11,051,320 us-gaap_OperatingIncomeLoss |  |  |  |  |  |  |  |
Other income: |  |  |  |  |  |  |  |  |  |  |  |
Interest income | 321,184 us-gaap_InvestmentIncomeInterest | 1,992,818 us-gaap_InvestmentIncomeInterest | 1,308,542 us-gaap_InvestmentIncomeInterest | 866,465 us-gaap_InvestmentIncomeInterest |  |  |  |  |  |  |  |
Interest expense | (101,307)us-gaap_InterestExpenseDebt | (628,571)us-gaap_InterestExpenseDebt | (447,084)us-gaap_InterestExpenseDebt | (107,857)us-gaap_InterestExpenseDebt |  |  |  |  |  |  |  |
Foreign exchange (loss) income, net | 12,214 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax | 75,780 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax | (48,379)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax | (4,533)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax |  |  |  |  |  |  |  |
Loss from equity method investments | (4,344)us-gaap_IncomeLossFromEquityMethodInvestments | (26,952)us-gaap_IncomeLossFromEquityMethodInvestments | (5,806)us-gaap_IncomeLossFromEquityMethodInvestments | (294,229)us-gaap_IncomeLossFromEquityMethodInvestments |  |  |  |  |  |  |  |
Others, net | 41,534 us-gaap_OtherNonoperatingIncomeExpense | 257,704 us-gaap_OtherNonoperatingIncomeExpense | 186,023 us-gaap_OtherNonoperatingIncomeExpense | 454,271 us-gaap_OtherNonoperatingIncomeExpense |  |  |  |  |  |  |  |
Total other income, net | 269,281 us-gaap_NonoperatingIncomeExpense | 1,670,779 us-gaap_NonoperatingIncomeExpense | 993,296 us-gaap_NonoperatingIncomeExpense | 914,117 us-gaap_NonoperatingIncomeExpense |  |  |  |  |  |  |  |
Income before income taxes | 2,332,874 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 14,474,543 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 12,185,016 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 11,965,437 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest |  |  |  |  |  |  |  |
Income taxes | (359,599)us-gaap_IncomeTaxExpenseBenefit | (2,231,172)us-gaap_IncomeTaxExpenseBenefit | (1,828,930)us-gaap_IncomeTaxExpenseBenefit | (1,574,159)us-gaap_IncomeTaxExpenseBenefit |  |  |  |  |  |  |  |
Net income | 1,973,275 us-gaap_ProfitLoss | 12,243,371 us-gaap_ProfitLoss | 10,356,086 us-gaap_ProfitLoss | 10,391,278 us-gaap_ProfitLoss |  |  |  |  |  |  |  |
Net loss attributable to noncontrolling interests | 152,097 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | 943,698 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | 162,880 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | 64,750 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest |  |  |  |  |  |  |  |
Net income attributable to Baidu, Inc. | 2,125,372 us-gaap_NetIncomeLoss | 13,187,069 us-gaap_NetIncomeLoss | 10,518,966 us-gaap_NetIncomeLoss | 10,456,028 us-gaap_NetIncomeLoss |  |  |  |  |  |  |  |
Basic |  |  |  |  | $ 60.37 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = bidu_CommonClassAAndClassBMember | 374.60 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = bidu_CommonClassAAndClassBMember | 299.75 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = bidu_CommonClassAAndClassBMember | 298.62 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = bidu_CommonClassAAndClassBMember | $ 6.04 us-gaap_EarningsPerShareBasic / bidu_EarningsPerShareAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 37.46 us-gaap_EarningsPerShareBasic / bidu_EarningsPerShareAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 29.98 us-gaap_EarningsPerShareBasic / bidu_EarningsPerShareAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 29.86 us-gaap_EarningsPerShareBasic / bidu_EarningsPerShareAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Diluted |  |  |  |  | $ 60.14 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = bidu_CommonClassAAndClassBMember | 373.15 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = bidu_CommonClassAAndClassBMember | 299.32 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = bidu_CommonClassAAndClassBMember | 298.29 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = bidu_CommonClassAAndClassBMember | $ 6.01 us-gaap_EarningsPerShareDiluted / bidu_EarningsPerShareAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 37.32 us-gaap_EarningsPerShareDiluted / bidu_EarningsPerShareAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 29.93 us-gaap_EarningsPerShareDiluted / bidu_EarningsPerShareAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 29.83 us-gaap_EarningsPerShareDiluted / bidu_EarningsPerShareAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Weighted average number of Class A and Class B ordinary shares outstanding |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  |  |  | 35,062,466 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = bidu_CommonClassAAndClassBMember | 35,062,466 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = bidu_CommonClassAAndClassBMember | 34,986,228 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = bidu_CommonClassAAndClassBMember | 34,939,838 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = bidu_CommonClassAAndClassBMember |  |  |  |
Diluted |  |  |  |  | 35,198,474 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = bidu_CommonClassAAndClassBMember | 35,198,474 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = bidu_CommonClassAAndClassBMember | 35,036,346 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = bidu_CommonClassAAndClassBMember | 34,979,459 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = bidu_CommonClassAAndClassBMember |  |  |  |
Other comprehensive income (loss): |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency translation adjustment | (71,835)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax | (445,710)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax | 190,322 us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax | (6,100)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax |  |  |  |  |  |  |  |
Unrealized gains (losses) on available-for-sale investments, net of reclassification | (23,420)us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax | (145,310)us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax | 668,372 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax | 11,391 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax |  |  |  |  |  |  |  |
Other comprehensive income (loss), net of tax | (95,255)us-gaap_OtherComprehensiveIncomeLossNetOfTax | (591,020)us-gaap_OtherComprehensiveIncomeLossNetOfTax | 858,694 us-gaap_OtherComprehensiveIncomeLossNetOfTax | 5,291 us-gaap_OtherComprehensiveIncomeLossNetOfTax |  |  |  |  |  |  |  |
Comprehensive income | 1,878,020 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | 11,652,351 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | 11,214,780 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | 10,396,569 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest |  |  |  |  |  |  |  |
Comprehensive loss attributable to noncontrolling interests | 148,848 us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest | 923,545 us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest | 225,560 us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest | 65,584 us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest |  |  |  |  |  |  |  |
Comprehensive income attributable to Baidu, Inc. | $ 2,026,868 us-gaap_ComprehensiveIncomeNetOfTax | 12,575,896 us-gaap_ComprehensiveIncomeNetOfTax | 11,440,340 us-gaap_ComprehensiveIncomeNetOfTax | 10,462,153 us-gaap_ComprehensiveIncomeNetOfTax |  |  |  |  |  |  |  |

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- Definition Revenue from the sale of advertising time (such as television and radio) or space (newspaper or magazine pages). May also include advertising, marketing and promotional services rendered during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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