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Other Long-Term Liabilities - Additional Information (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Other Liabilities Disclosure [Abstract] |  |
Advances received on capital grants | $ 152 | $ 0

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- Definition Advances Received On Capital Grants + References No definition available. + Details
Name: | stm_AdvancesReceivedOnCapitalGrants
Namespace Prefix: | stm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_OtherLiabilitiesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration