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Convertible Senior Notes - Additional Information (Detail) $ / shares in Units, ¥ in Millions |  |  |  |  |  |  | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 07, 2023 USD ($) Day $ / shares | Dec. 30, 2022 USD ($) $ / shares | Jan. 08, 2021 USD ($) | Dec. 21, 2020 USD ($) Day $ / shares | Mar. 29, 2019 CNY (¥) Day $ / A | Dec. 04, 2018 CNY (¥) Day $ / A | Dec. 31, 2023 CNY (¥) | Dec. 31, 2023 USD ($) | Dec. 31, 2023 USD ($) | Feb. 24, 2023 USD ($) | Dec. 31, 2022 CNY (¥) | Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Mar. 29, 2019 USD ($) $ / shares $ / A | Dec. 04, 2018 USD ($) $ / shares $ / A
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt maturities repayments in 2025 |  |  |  |  |  |  |  | ¥ 17 |  | $ 2,000,000 |  |  |  |  |  |
Debt maturities repayments in 2026 |  |  |  |  |  |  |  | 2,800 |  | 396,000,000 |  |  |  |  |  |
Debt maturities repayments in 2028 |  |  |  |  |  |  |  | 9,200 |  | 1,300,000,000 |  |  |  |  |  |
Restricted cash | [1] |  |  |  |  |  |  | 840 |  | 118,000,000 |  | ¥ 750 |  |  |  |
iQIYI 2023 Convertible Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 750,000,000
Interest rate |  |  |  |  |  |  | 3.75% |  |  |  |  |  |  |  |  | 3.75%
Debt, maturity date |  |  |  |  |  |  | Dec. 01, 2023 |  |  |  |  |  |  |  |  |
Debt, put date |  |  |  |  |  |  | Dec. 01, 2021 |  |  |  |  |  |  |  |  |
Conversion rate of convertible notes, ADS per US$1,000 |  |  |  |  |  |  | 37.183 |  |  |  |  |  |  |  |  |
Debt Instrument Frequency Of Periodic Interest Payment |  |  |  |  |  |  | interest is payable semi-annually |  |  |  |  |  |  |  |  |
Percentage of principal amount of debt redeemed |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |
Price of call options on iQIYI's ADS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 68,000,000
Debt Instrument, convertible, conversion price | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 26.89
Debt Instrument Convertible Conversion Ratio Basis Amount US$1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,000
Payments for repurchase of Convertible Notes |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 8,500 | $ 747,000,000 |  |
iQIYI 2023 Convertible Senior Notes | ADR [Member] | Prior To June 1 2023 Debt Conversion Condition One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, convertible, threshold trading days | Day |  |  |  |  |  |  | 20 |  |  |  |  |  |  |  |  |
Debt instrument, convertible, threshold consecutive trading days | Day |  |  |  |  |  |  | 30 |  |  |  |  |  |  |  |  |
Debt instrument convertible threshold percentage of stock price trigger |  |  |  |  |  |  | 130.00% |  |  |  |  |  |  |  |  |
iQIYI 2023 Convertible Senior Notes | ADR [Member] | Prior To June 1 2023 Debt Conversion Condition Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, convertible, threshold trading days | Day |  |  |  |  |  |  | 5 |  |  |  |  |  |  |  |  |
Debt instrument, convertible, threshold consecutive trading days | Day |  |  |  |  |  |  | 10 |  |  |  |  |  |  |  |  |
Debt instrument convertible threshold percentage of stock price trigger |  |  |  |  |  |  | 98.00% |  |  |  |  |  |  |  |  |
iQIYI 2023 Convertible Senior Notes | Call Option [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Price of call options on iQIYI's ADS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 68,000,000
Cap exercise price of capped call options | $ / A |  |  |  |  |  |  | 38.42 |  |  |  |  |  |  |  |  | 38.42
Settlement Shares Of Capped Call Options | ¥ |  |  |  |  |  |  | ¥ 28 |  |  |  |  |  |  |  |  |
iQIYI 2025 Convertible Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,200,000,000 |
Interest rate |  |  |  |  |  | 2.00% |  |  |  |  |  |  |  |  | 2.00% |
Debt, maturity date |  |  |  |  |  | Apr. 01, 2025 |  |  |  |  |  |  |  |  |  |
Debt, put date |  |  |  |  |  | Apr. 01, 2023 |  |  |  |  |  |  |  |  |  |
Conversion rate of convertible notes, ADS per US$1,000 |  |  |  |  |  | 33.0003 |  |  |  |  |  |  |  |  |  |
Debt Instrument Frequency Of Periodic Interest Payment |  |  |  |  |  | interest is payable semi-annually |  |  |  |  |  |  |  |  |  |
Percentage of principal amount of debt redeemed |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |
Price of call options on iQIYI's ADS |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 85,000,000 |
Settlement Shares Of Capped Call Options | ¥ |  |  |  |  |  | ¥ 40 |  |  |  |  |  |  |  |  |  |
Debt instrument, date of first required payment |  |  |  |  |  | Oct. 01, 2019 |  |  |  |  |  |  |  |  |  |
Debt instrument, payment terms |  |  |  |  |  | October 1 and April 1 of each year, beginning on October 1, 2019 |  |  |  |  |  |  |  |  |  |
Debt Instrument Convertible Conversion Ratio Basis Amount US$1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,000 |
Payments for repurchase of Convertible Notes |  |  |  |  |  |  |  | ¥ 8,500 |  | 1,200,000,000 |  |  |  |  |  |
iQIYI 2025 Convertible Senior Notes | ADR [Member] | Prior To October 1 2024 Debt Conversion Condition One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, convertible, conversion price | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 30.3 |
Debt Instrument, convertible, threshold trading days | Day |  |  |  |  |  | 20 |  |  |  |  |  |  |  |  |  |
Debt instrument, convertible, threshold consecutive trading days | Day |  |  |  |  |  | 30 |  |  |  |  |  |  |  |  |  |
Debt instrument convertible threshold percentage of stock price trigger |  |  |  |  |  | 130.00% |  |  |  |  |  |  |  |  |  |
iQIYI 2025 Convertible Senior Notes | ADR [Member] | Prior To October 1 2024 Debt Conversion Condition Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, convertible, threshold trading days | Day |  |  |  |  |  | 5 |  |  |  |  |  |  |  |  |  |
Debt instrument, convertible, threshold consecutive trading days | Day |  |  |  |  |  | 10 |  |  |  |  |  |  |  |  |  |
Debt instrument convertible threshold percentage of stock price trigger |  |  |  |  |  | 98.00% |  |  |  |  |  |  |  |  |  |
iQIYI 2025 Convertible Senior Notes | Call Option [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Price of call options on iQIYI's ADS |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 85,000,000 |
Cap exercise price of capped call options | $ / A |  |  |  |  |  | 40.02 |  |  |  |  |  |  |  |  | 40.02 |
IQIYI 2026 Convertible Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt face amount |  |  |  |  | $ 800,000,000 |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  | 4.00% |  |  |  |  |  |  |  |  |  |  |
Debt, maturity date |  |  |  |  | Dec. 15, 2026 |  |  |  |  |  |  |  |  |  |  |
Debt, put date |  |  |  |  | Aug. 01, 2024 |  |  |  |  |  |  |  |  |  |  |
Conversion rate of convertible notes, ADS per US$1,000 |  |  |  |  | 44.8179 |  |  |  |  |  |  |  |  |  |  |
Principal amount of liability component |  |  |  |  |  |  |  |  |  | 396,000,000 |  |  |  |  |  |
Remaining Accretion Period |  |  |  |  |  |  |  | 7 months 2 days | 7 months 2 days |  |  |  |  |  |  |
Debt Instrument Frequency Of Periodic Interest Payment |  |  |  |  | interest is payable semi-annually |  |  |  |  |  |  |  |  |  |  |
Percentage of principal amount of debt redeemed |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |
Debt instrument, date of first required payment |  |  |  |  | Jun. 15, 2021 |  |  |  |  |  |  |  |  |  |  |
Debt instrument, payment terms |  |  |  |  | June 15 and December 15 of each year, beginning on June 15, 2021 |  |  |  |  |  |  |  |  |  |  |
Grosss Proceeds from issuance of debt |  |  |  | $ 100,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Additional Debt Principal Amount Offered |  |  |  |  | $ 100,000,000 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Convertible Conversion Ratio Basis Amount US$1,000 |  |  |  |  | $ 1,000 |  |  |  |  |  |  |  |  |  |  |
Payments for repurchase of Convertible Notes |  |  |  |  |  |  |  | ¥ 3,600 |  | $ 504,000,000 |  |  |  |  |  |
IQIYI 2026 Convertible Notes | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Effective interest rate |  |  |  |  |  |  |  | 4.53% |  | 4.53% |  |  |  |  |  |
IQIYI 2026 Convertible Notes | ADR [Member] | Prior To June 15 2026 Debt Conversion Condition One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, convertible, conversion price | $ / shares |  |  |  |  | $ 22.31 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, convertible, threshold trading days | Day |  |  |  |  | 20 |  |  |  |  |  |  |  |  |  |  |
Debt instrument, convertible, threshold consecutive trading days | Day |  |  |  |  | 30 |  |  |  |  |  |  |  |  |  |  |
Debt instrument convertible threshold percentage of stock price trigger |  |  |  |  | 130.00% |  |  |  |  |  |  |  |  |  |  |
IQIYI 2026 Convertible Notes | ADR [Member] | Prior To June 15 2026 Debt Conversion Condition Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, convertible, threshold trading days | Day |  |  |  |  | 5 |  |  |  |  |  |  |  |  |  |  |
Debt instrument, convertible, threshold consecutive trading days | Day |  |  |  |  | 10 |  |  |  |  |  |  |  |  |  |  |
Debt instrument convertible threshold percentage of stock price trigger |  |  |  |  | 98.00% |  |  |  |  |  |  |  |  |  |  |
iQIYI PAG Convertible Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt face amount |  |  | $ 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible senior notes rate stated percentage |  |  | 6.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion rate of convertible notes, ADS per US$1,000 |  |  | 216.9668 |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount of liability component |  |  |  |  |  |  |  |  |  | $ 660,000,000 |  |  |  |  |  |
Remaining Accretion Period |  |  |  |  |  |  |  | 2 years | 2 years |  |  |  |  |  |  |
Debt Instrument Frequency Of Periodic Interest Payment |  |  | interest is payable quarterly |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, convertible, conversion price | $ / shares |  |  | $ 4.61 |  |  |  |  |  |  |  |  |  |  |  |  |
Additional Debt Principal Amount Offered |  |  | $ 50,000,000 |  |  |  |  |  |  |  | $ 50,000,000 |  |  |  |  |
Debt Instrument Convertible Conversion Ratio Basis Amount US$1,000 |  |  | $ 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Interest cost recognized during the period |  |  |  |  |  |  |  | ¥ 473 | $ 67,000,000 |  |  |  |  |  |  |
Restricted cash |  |  |  |  |  |  |  | ¥ 840 |  | $ 118,000,000 |  |  |  |  |  |
iQIYI PAG Convertible Senior Notes | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Effective interest rate |  |  |  |  |  |  |  | 12.05% |  | 12.05% |  |  |  |  |  |
Percentage of principal amount of debt redeemed |  |  |  |  |  |  |  | 120.00% | 120.00% |  |  |  |  |  |  |
iQIYI PAG Convertible Senior Notes | On or After Third Anniversary [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument repurchase price rate |  |  | 120.00% |  |  |  |  |  |  |  |  |  |  |  |  |
iQIYI PAG Convertible Senior Notes | On or After Fifth Anniversary [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument repurchase price rate |  |  | 130.00% |  |  |  |  |  |  |  |  |  |  |  |  |
iQIYI PAG Convertible Senior Notes | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of principal amount of debt redeemed |  | 120.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
iQIYI PAG Convertible Senior Notes | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of principal amount of debt redeemed |  | 130.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
iQIYI 2028 Convertible Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt face amount |  | $ 600,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  | 6.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, maturity date |  | Mar. 15, 2028 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, put date |  | Mar. 16, 2026 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion rate of convertible notes, ADS per US$1,000 |  | 101.4636 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount of liability component |  |  |  |  |  |  |  |  |  | $ 574,000,000 |  |  |  |  |  |
Remaining Accretion Period |  |  |  |  |  |  |  | 2 years 2 months 15 days | 2 years 2 months 15 days |  |  |  |  |  |  |
Debt Instrument Frequency Of Periodic Interest Payment |  | interest is payable quarterly |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of principal amount of debt redeemed |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, date of first required payment |  | Jun. 15, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, payment terms |  | March 15, June 15, September 15 and December 15 of each year, beginning on June 15, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Debt, Net ofunderwriting discounts and offering expenses |  | $ 590,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment of underwriting discounts and offering expenses |  | 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grosss Proceeds from issuance of debt |  | 600,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Convertible Conversion Ratio Basis Amount US$1,000 |  | $ 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments for repurchase of Convertible Notes |  |  |  |  |  |  |  | ¥ 185 |  | $ 26,000,000 |  |  |  |  |  |
Debt instrument repurchase price rate |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
iQIYI 2028 Convertible Notes | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Effective interest rate |  |  |  |  |  |  |  | 7.15% |  | 7.15% |  |  |  |  |  |
iQIYI 2028 Convertible Notes | ADR [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, convertible, conversion price | $ / shares |  | $ 9.86 |  |  |  |  |  |  |  |  |  |  |  |  |  |
iQIYI 2028 Convertible Notes | ADR [Member] | Prior To September 15 2027 Debt Conversion Condition Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, convertible, threshold trading days | Day |  | 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, convertible, threshold consecutive trading days | Day |  | 10 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument convertible threshold percentage of stock price trigger |  | 98.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Convertible Conversion Ratio Basis Amount US$1,000 |  | $ 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
iQIYI 2028 Convertible Notes | ADR [Member] | Prior to On or after March 20 2026 Debt Conversion Condition One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, convertible, threshold trading days | Day |  | 20 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, convertible, threshold consecutive trading days | Day |  | 30 |  |  |  |  |  |  |  |  |  |  |  |  |  |
iQIYI 2028 Convertible Notes | ADR [Member] | Prior to On or after March 20 2026 Debt Conversion Condition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument convertible threshold percentage of stock price trigger |  | 130.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
iQIYI 2028 Convertible Notes | ADR [Member] | Prior To September 15 2027 Debt Conversion Condition One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, convertible, threshold trading days | Day |  | 20 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, convertible, threshold consecutive trading days | Day |  | 30 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument convertible threshold percentage of stock price trigger |  | 130.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Long-term restricted cash represents collateral to repayments of the iQIYI PAG Convertible Notes (Note 15).

X
- Definition Additional debt principal amount offered. + References No definition available. + Details
Name: | bidu_AdditionalDebtPrincipalAmountOffered
Namespace Prefix: | bidu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Cap exercise price of capped call options. + References No definition available. + Details
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