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Computation of Basic and Diluted Net Income Attributable to Baidu, Inc. Per Share for Class A and Class B Ordinary Shares (Detail) In Thousands, except Share data, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 USD ($) | Dec. 31, 2014 CNY | Dec. 31, 2013 CNY | Dec. 31, 2012 CNY | Dec. 31, 2014 Class A Ordinary Shares USD ($) | Dec. 31, 2014 Class A Ordinary Shares CNY | Dec. 31, 2013 Class A Ordinary Shares CNY | Dec. 31, 2012 Class A Ordinary Shares CNY | Dec. 31, 2014 Class A Ordinary Shares American Depositary Shares USD ($) | Dec. 31, 2014 Class A Ordinary Shares American Depositary Shares CNY | Dec. 31, 2013 Class A Ordinary Shares American Depositary Shares CNY | Dec. 31, 2012 Class A Ordinary Shares American Depositary Shares CNY | Dec. 31, 2014 Class B Ordinary Shares USD ($) | Dec. 31, 2014 Class B Ordinary Shares CNY | Dec. 31, 2013 Class B Ordinary Shares CNY | Dec. 31, 2012 Class B Ordinary Shares CNY
Earnings per ADS: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Denominator used for earnings per ADS - basic |  |  |  |  | 27,551,463 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 27,551,463 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 27,274,769 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 27,145,208 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 275,514,630 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 275,514,630 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 272,747,690 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 271,452,080 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 7,511,003 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 7,511,003 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 7,711,459 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 7,794,630 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Denominator used for earnings per ADS - diluted |  |  |  |  | 35,198,474 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 35,198,474 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 35,036,346 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 34,979,459 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 351,984,740 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 351,984,740 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 350,363,460 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 349,794,590 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 7,511,003 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 7,511,003 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 7,711,459 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 7,794,630 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Earnings per ADS - basic |  |  |  |  | $ 60.37 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 374.60 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 299.75 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 298.62 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | $ 6.04 us-gaap_EarningsPerShareBasic / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 37.46 us-gaap_EarningsPerShareBasic / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 29.98 us-gaap_EarningsPerShareBasic / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 29.86 us-gaap_EarningsPerShareBasic / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | $ 60.37 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 374.60 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 299.75 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 298.62 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Earnings per ADS - diluted |  |  |  |  | $ 60.14 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 373.15 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 299.32 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 298.29 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | $ 6.01 us-gaap_EarningsPerShareDiluted / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 37.32 us-gaap_EarningsPerShareDiluted / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 29.93 us-gaap_EarningsPerShareDiluted / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 29.83 us-gaap_EarningsPerShareDiluted / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | $ 60.14 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 373.15 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 299.32 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 298.29 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Numerator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocation of net income attributable to Baidu, Inc. | $ 2,116,879 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 13,134,386 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 10,487,167 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 10,433,885 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 1,663,406 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 10,320,767 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 8,175,647 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 8,106,219 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |  |  |  | $ 453,473 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 2,813,619 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 2,311,520 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 2,327,666 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Denominator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average ordinary shares outstanding |  |  |  |  | 27,551,463 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 27,551,463 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 27,274,769 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 27,145,208 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 275,514,630 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 275,514,630 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 272,747,690 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 271,452,080 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 7,511,003 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 7,511,003 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 7,711,459 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 7,794,630 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Denominator used for earnings per share |  |  |  |  | 27,551,463 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 27,551,463 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 27,274,769 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 27,145,208 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 275,514,630 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 275,514,630 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 272,747,690 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 271,452,080 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 7,511,003 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 7,511,003 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 7,711,459 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 7,794,630 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Earnings per share - basic |  |  |  |  | $ 60.37 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 374.60 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 299.75 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 298.62 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | $ 6.04 us-gaap_EarningsPerShareBasic / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 37.46 us-gaap_EarningsPerShareBasic / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 29.98 us-gaap_EarningsPerShareBasic / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 29.86 us-gaap_EarningsPerShareBasic / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | $ 60.37 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 374.60 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 299.75 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 298.62 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Numerator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocation of net income attributable to Baidu, Inc. for diluted computation |  |  |  |  | 1,665,158 us-gaap_UndistributedEarnings / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 10,331,639 us-gaap_UndistributedEarnings / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 8,178,954 us-gaap_UndistributedEarnings / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 8,108,856 us-gaap_UndistributedEarnings / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |  |  |  | 451,721 us-gaap_UndistributedEarnings / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 2,802,747 us-gaap_UndistributedEarnings / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 2,308,213 us-gaap_UndistributedEarnings / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 2,325,029 us-gaap_UndistributedEarnings / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Reallocation of net income attributable to Baidu, Inc. as a result of conversion of Class B to Class A shares |  |  |  |  | 451,721 us-gaap_DilutiveSecuritiesEffectOnBasicEarningsPerShareOther / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 2,802,747 us-gaap_DilutiveSecuritiesEffectOnBasicEarningsPerShareOther / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 2,308,213 us-gaap_DilutiveSecuritiesEffectOnBasicEarningsPerShareOther / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 2,325,029 us-gaap_DilutiveSecuritiesEffectOnBasicEarningsPerShareOther / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |  |  |  |  |  |  |
Allocation of net income attributable to Baidu, Inc. |  |  |  |  | $ 2,116,879 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 13,134,386 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 10,487,167 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 10,433,885 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |  |  |  | $ 451,721 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 2,802,747 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 2,308,213 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 2,325,029 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Denominator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average ordinary shares outstanding |  |  |  |  | 27,551,463 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 27,551,463 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 27,274,769 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 27,145,208 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 275,514,630 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 275,514,630 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 272,747,690 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 271,452,080 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 7,511,003 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 7,511,003 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 7,711,459 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 7,794,630 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Conversion of Class B to Class A ordinary shares |  |  |  |  | 7,511,003 bidu_IncrementalCommonSharesAttributableToConversionOfOtherClassOfStock / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 7,511,003 bidu_IncrementalCommonSharesAttributableToConversionOfOtherClassOfStock / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 7,711,459 bidu_IncrementalCommonSharesAttributableToConversionOfOtherClassOfStock / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 7,794,630 bidu_IncrementalCommonSharesAttributableToConversionOfOtherClassOfStock / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |  |  |  |  |  |  |
Share-based awards |  |  |  |  | 136,008 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 136,008 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 50,118 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 39,621 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |  |  |  |  |  |  |
Denominator used for earnings per share |  |  |  |  | 35,198,474 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 35,198,474 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 35,036,346 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 34,979,459 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 351,984,740 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 351,984,740 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 350,363,460 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 349,794,590 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 7,511,003 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 7,511,003 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 7,711,459 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 7,794,630 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Earnings per share - diluted |  |  |  |  | $ 60.14 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 373.15 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 299.32 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 298.29 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | $ 6.01 us-gaap_EarningsPerShareDiluted / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 37.32 us-gaap_EarningsPerShareDiluted / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 29.93 us-gaap_EarningsPerShareDiluted / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 29.83 us-gaap_EarningsPerShareDiluted / bidu_EarningsPerShareDenominatorAxis = bidu_AmericanDepositaryShareMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | $ 60.14 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 373.15 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 299.32 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 298.29 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember

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