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Earnings Per Share ("EPS") (Tables) | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Reconciliation of Net Income to Numerator for Computation of Basic and Diluted Net Income per Share | A reconciliation of net income attributable to Baidu, Inc. in the consolidated statements of comprehensive income to the numerator for the computation of basic and diluted per share for the years ended December 31, 2015, 2016 and 2017 is as follows:
|  | For the years ended December 31, |
|  | 2015 |  |  | 2016 |  |  | 2017 |  |  | 2017 |
|  | RMB |  |  | RMB |  |  | RMB |  |  | US$ |
|  | (In millions) |
Net income attributable to Baidu, Inc. |  |  | 33,664 |  |  |  | 11,632 |  |  |  | 18,301 |  |  |  | 2,812 |
Accretion of the redeemable noncontrolling interests |  |  | (329 | ) |  |  | (557 | ) |  |  | 17 |  |  |  | 3 |
Numerator for EPS computation |  |  | 33,335 |  |  |  | 11,075 |  |  |  | 18,318 |  |  |  | 2,815 |
Computation of Basic and Diluted Earnings Per Class A and Class B Ordinary Share | The following table sets forth the computation of basic and diluted earnings per Class A and Class B ordinary share.
|  | For the years ended December 31, |
|  | 2015 |  |  | 2016 |  |  | 2017 |  |  | 2017 |
|  | Class A |  |  | Class B |  |  | Class A |  |  | Class B |  |  | Class A |  |  | Class A |  |  | Class B |  |  | Class B |
|  | RMB |  |  | RMB |  |  | RMB |  |  | RMB |  |  | RMB |  |  | US$ |  |  | RMB |  |  | US$ |
|  | (In millions, except for number of shares, per share and per ADS data) |
Earnings per share – basic: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Numerator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocation of net income attributable to Baidu, Inc. |  |  | 26,183 |  |  |  | 7,152 |  |  |  | 8,710 |  |  |  | 2,365 |  |  |  | 14,488 |  |  |  | 2,226 |  |  |  | 3,830 |  |  |  | 589 |
Denominator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average ordinary shares outstanding |  |  | 27,428,861 |  |  |  | 7,492,921 |  |  |  | 27,263,984 |  |  |  | 7,401,254 |  |  |  | 27,464,760 |  |  |  | 27,464,760 |  |  |  | 7,260,363 |  |  |  | 7,260,363 |
Denominator used for basic EPS |  |  | 27,428,861 |  |  |  | 7,492,921 |  |  |  | 27,263,984 |  |  |  | 7,401,254 |  |  |  | 27,464,760 |  |  |  | 27,464,760 |  |  |  | 7,260,363 |  |  |  | 7,260,363 |
Earnings per share – basic |  |  | 954.56 |  |  |  | 954.56 |  |  |  | 319.47 |  |  |  | 319.47 |  |  |  | 527.51 |  |  |  | 81.08 |  |  |  | 527.51 |  |  |  | 81.08 |
Earnings per share – diluted: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Numerator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocation of net income attributable to Baidu, Inc. for diluted computation |  |  | 26,206 |  |  |  | 7,129 |  |  |  | 8,716 |  |  |  | 2,359 |  |  |  | 14,513 |  |  |  | 2,230 |  |  |  | 3,805 |  |  |  | 585 |
Reallocation of net income attributable to Baidu, Inc. as a result of conversion of Class B to Class A shares |  |  | 7,129 |  |  |  | — |  |  |  | 2,359 |  |  |  | — |  |  |  | 3,805 |  |  |  | 585 |  |  |  | — |  |  |  | — |
Numerator for diluted EPS calculation |  |  | 33,335 |  |  |  | 7,129 |  |  |  | 11,075 |  |  |  | 2,359 |  |  |  | 18,318 |  |  |  | 2,815 |  |  |  | 3,805 |  |  |  | 585 |
Denominator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average ordinary shares outstanding |  |  | 27,428,861 |  |  |  | 7,492,921 |  |  |  | 27,263,984 |  |  |  | 7,401,254 |  |  |  | 27,464,760 |  |  |  | 27,464,760 |  |  |  | 7,260,363 |  |  |  | 7,260,363 |
Conversion of Class B to Class A ordinary shares |  |  | 7,492,921 |  |  |  | — |  |  |  | 7,401,254 |  |  |  | — |  |  |  | 7,260,363 |  |  |  | 7,260,363 |  |  |  | — |  |  |  | — |
Share-based awards |  |  | 112,688 |  |  |  | — |  |  |  | 91,848 |  |  |  | — |  |  |  | 227,268 |  |  |  | 227,268 |  |  |  | — |  |  |  | — |
Denominator used for diluted EPS |  |  | 35,034,470 |  |  |  | 7,492,921 |  |  |  | 34,757,086 |  |  |  | 7,401,254 |  |  |  | 34,952,391 |  |  |  | 34,952,391 |  |  |  | 7,260,363 |  |  |  | 7,260,363 |
Earnings per share – diluted |  |  | 951.49 |  |  |  | 951.49 |  |  |  | 318.62 |  |  |  | 318.62 |  |  |  | 524.08 |  |  |  | 80.55 |  |  |  | 524.08 |  |  |  | 80.55 |
Earnings per ADS: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Denominator used for earnings per ADS – basic |  |  | 274,288,610 |  |  |  |  |  |  |  | 272,639,840 |  |  |  |  |  |  |  | 274,647,600 |  |  |  | 274,647,600 |  |  |  |  |  |  |  |  |
Denominator used for earnings per ADS – diluted |  |  | 350,344,700 |  |  |  |  |  |  |  | 347,570,860 |  |  |  |  |  |  |  | 349,523,910 |  |  |  | 349,523,910 |  |  |  |  |  |  |  |  |
Earnings per ADS – basic |  |  | 95.46 |  |  |  |  |  |  |  | 31.95 |  |  |  |  |  |  |  | 52.75 |  |  |  | 8.11 |  |  |  |  |  |  |  |  |
Earnings per ADS – diluted |  |  | 95.15 |  |  |  |  |  |  |  | 31.86 |  |  |  |  |  |  |  | 52.41 |  |  |  | 8.06 |  |  |  |  |  |  |  |  |

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- Definition Tabular disclosure of a reconciliation of net income attributable to Baidu, Inc. in the consolidated statements of comprehensive income to the numerator for the computation of basic and diluted net income attributable to Baidu, Inc. per share. + References No definition available. + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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