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Share-Based Awards Plan (Tables) | 12 Months Ended
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Dec. 31, 2017
Total Share-Based Compensation Cost Recognized | The following table summarizes the total share-based compensation cost recognized by the Group:
|  | For the years ended December 31, |
|  | 2015 |  |  | 2016 |  |  | 2017 |  |  | 2017 |
|  | RMB |  |  | RMB |  |  | RMB |  |  | US$ |
|  | (In millions) |
Expensed as cost of revenues |  |  | 49 |  |  |  | 103 |  |  |  | 183 |  |  |  | 28 |
Expensed as selling, general and administrative |  |  | 487 |  |  |  | 429 |  |  |  | 973 |  |  |  | 150 |
Expensed as research and development |  |  | 851 |  |  |  | 1,228 |  |  |  | 2,088 |  |  |  | 321 |
Capitalized as part of internal-used software |  |  | 1 |  |  |  | — |  |  |  | — |  |  |  | — |
Baidu |
Option Activity | The following table summarizes the option activity for the year ended December 31, 2017:
|  | Number of shares |  |  | Weighted average exercise price (US$) |  |  | Weighted average remaining contractual life (Years) |  |  | Aggregate intrinsic value (US$ in millions) |
Share options |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding, December 31, 2016 |  |  | 231,239 |  |  |  | 1,537.40 |  |  |  | 7.25 |  |  |  | 62 |
Granted |  |  | 151,990 |  |  |  | 1,860.29 |  |  |  |  |  |  |  |  |
Exercised |  |  | (57,072 | ) |  |  | 1,177.53 |  |  |  |  |  |  |  |  |
Forfeited/Cancelled |  |  | (10,760 | ) |  |  | 1,691.10 |  |  |  |  |  |  |  |  |
Outstanding, December 31, 2017 |  |  | 315,397 |  |  |  | 1,752.90 |  |  |  | 7.83 |  |  |  | 186 |
Vested and expected to vest at December 31, 2017 |  |  | 266,234 |  |  |  | 1,729.96 |  |  |  | 7.67 |  |  |  | 163 |
Exercisable at December 31, 2017 |  |  | 100,197 |  |  |  | 1,500.53 |  |  |  | 5.82 |  |  |  | 84 |
Assumptions Used to Estimate Fair Values of Share Options Granted | The following table presents the assumptions used to estimate the fair values of the share options granted in the years presented:
|  | For the years ended December 31 |
|  | 2015 |  |  | 2016 |  |  | 2017 |
Risk-free interest rate |  |  | 1.31%~1.36% |  |  |  | 1.13%~1.47% |  |  |  | 1.81%~2.08% |
Dividend yield |  |  | — |  |  |  | — |  |  |  | — |
Expected volatility range |  |  | 40.04%~40.57% |  |  |  | 38.91%~40.09% |  |  |  | 35.99%~38.41% |
Weighted average expected volatility |  |  | 40.21% |  |  |  | 39.37% |  |  |  | 38.39% |
Expected life (in years) |  |  | 5.02~5.13 |  |  |  | 5.75~5.92 |  |  |  | 4.99~6.01 |
Restricted Shares Activity | Restricted Shares activity for the year ended December 31, 2017 was as follows:
|  | Number of shares |  |  | Weighted average grant date fair value (US$) |
Restricted Shares |  |  |  |  |  |  |  |
Unvested, December 31, 2016 |  |  | 707,271 |  |  |  | 1,801.15 |
Granted |  |  | 427,579 |  |  |  | 1,977.57 |
Vested |  |  | (178,138 | ) |  |  | 1,777.22 |
Forfeited/Cancelled |  |  | (137,042 | ) |  |  | 1,792.96 |
Unvested, December 31, 2017 |  |  | 819,670 |  |  |  | 1,899.37 |
iQIYI |
Total Share-Based Compensation Cost Recognized | The following table summarizes the share-based compensation cost recognized by iQIYI:
|  | For the years ended December 31, |
|  | 2015 |  |  | 2016 |  |  | 2017 |  |  | 2017 |
|  | RMB |  |  | RMB |  |  | RMB |  |  | US$ |
|  | (In millions) |
Expensed as cost of revenues |  |  | 6 |  |  |  | 9 |  |  |  | 35 |  |  |  | 5 |
Expensed as selling, general and administrative |  |  | 21 |  |  |  | 30 |  |  |  | 131 |  |  |  | 20 |
Expensed as research and development |  |  | 17 |  |  |  | 23 |  |  |  | 67 |  |  |  | 11 |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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