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v3.8.0.1

Changes in Carrying Amount of Goodwill (Detail) ¥ in Millions, $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2017 CNY (¥) | Dec. 31, 2017 USD ($) | Dec. 31, 2017 CNY (¥) | Dec. 31, 2016 CNY (¥)
Goodwill [Line Items] |  |  |  |
Beginning Balance | ¥ 15,342 |  | ¥ 15,841 | ¥ 15,396
Goodwill acquired | 499 |  | 81 |
Goodwill disposed |  |  | (116) | (54)
Ending Balance | 15,841 | $ 2,429 | 15,806 | 15,342
Search Services |  |  |  |
Goodwill [Line Items] |  |  |  |
Beginning Balance | 10,785 |  | 11,284 | 10,823
Goodwill acquired | 499 |  |  |
Goodwill disposed |  |  |  | (38)
Ending Balance | 11,284 |  |  | 10,785
Transaction Services |  |  |  |
Goodwill [Line Items] |  |  |  |
Beginning Balance | 1,281 |  | 1,281 | 1,297
Goodwill acquired | 0 |  |  |
Goodwill disposed |  |  |  | (16)
Ending Balance | 1,281 |  |  | 1,281
iQIYI |  |  |  |
Goodwill [Line Items] |  |  |  |
Beginning Balance | 3,276 |  | 3,276 | 3,276
Goodwill acquired | 0 |  | 0 |
Goodwill disposed |  |  | 0 | 0
Ending Balance | 3,276 | 503 | 3,276 | ¥ 3,276
Baidu Core |  |  |  |
Goodwill [Line Items] |  |  |  |
Beginning Balance |  |  | 12,565 |
Goodwill acquired |  |  | 81 |
Goodwill disposed |  |  | (116) |
Ending Balance | ¥ 12,565 | $ 1,926 | ¥ 12,530 |

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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