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Goodwill and Intangible Assets - Additional Information (Detail) ¥ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023 CNY (¥) Unit	Dec. 31, 2023 USD ($) Unit	Dec. 31, 2022 CNY (¥) Unit	Dec. 31, 2021 CNY (¥)
Amortization Of Intangible Assets Disclosure [Abstract]
Number of reporting units the company	3	3	3
Amortization expense of intangible assets	¥ 403	$ 57	¥ 467	¥ 471

X

- Definition

Amortization expense of intangible assets.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	duration

X

- Definition

Amortization Of Intangible Assets Disclosure [Abstract]

+ References

No definition available.

+ Details

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Namespace Prefix:	bidu_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of reporting units the company split Baidu reporting unit into.

+ References

No definition available.

+ Details

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Namespace Prefix:	bidu_
Data Type:	xbrli:integerItemType
Balance Type:	na
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