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Other Payables and Accrued Liabilities - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2022 USD ($)
Payables And Accruals [Abstract]
Deferred and contingent consideration paid	$ 25,000,000
Provision for penalties	$ 0

X

- Definition

Payment for deferred and contingent consideration on business acquisitions.

+ References

No definition available.

+ Details

Name:	stm_PaymentForDeferredAndContingentConsiderationOnBusinessAcquisitions
Namespace Prefix:	stm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Provision for penalties.

+ References

No definition available.

+ Details

Name:	stm_ProvisionForPenalties
Namespace Prefix:	stm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_PayablesAndAccrualsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration