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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