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Summary of Revenues Disaggregated by Revenue Source (Detail) ¥ in Millions, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 USD ($) | Sep. 30, 2018 CNY (¥) | Sep. 30, 2017 CNY (¥) | Sep. 30, 2018 USD ($) | Sep. 30, 2018 CNY (¥) | Sep. 30, 2017 CNY (¥)
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Total revenue |  |  | ¥ 23,489 |  |  | ¥ 61,254
Total revenue | $ 4,106 | ¥ 28,203 |  | $ 10,932 | ¥ 75,082 |
Online Marketing Services |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Total revenue |  |  | 20,108 |  |  | 52,729
Total revenue | 3,273 | 22,481 |  | 8,840 | 60,715 |
Other Revenue iQIYI Membership Service |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Total revenue |  |  | 1,697 |  |  | 4,607
Total revenue | 415 | 2,852 |  | 1,081 | 7,421 |
Other Revenue iQIYI Content Distribution |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Total revenue |  |  | 276 |  |  | 958
Total revenue | 122 | 835 |  | 239 | 1,641 |
Other Interest Income Earned from Provision of Financial Services |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Total revenue |  |  | 495 |  |  | 1,029
Total revenue | 59 | 408 |  | 251 | 1,724 |
Other Revenue Other |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Total revenue |  |  | 913 |  |  | 1,931
Total revenue | 237 | 1,627 |  | 521 | 3,581 |
Other Revenue |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Total revenue |  |  | ¥ 3,381 |  |  | ¥ 8,525
Total revenue | $ 833 | ¥ 5,722 |  | $ 2,092 | ¥ 14,367 |

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