XML 108 R92.htm IDEA: XBRL DOCUMENT v3.22.4

Long-Term Debt - Long-Term Debt (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
2.67% due 2028, floating interest rate at Euribor + 0.589% [Member]
Debt Instrument [Line Items]
Long-term debt maturity date	2028	2028
Interest rate	2.67%	2.67%
Description of floating rate basis	Euribor + 0.589%	Euribor + 0.589%
Basis spread on floating rate	0.589%	0.589%
1.20% due 2029, floating interest rate at Euribor + 0.564% [Member]
Debt Instrument [Line Items]
Long-term debt maturity date	2029	2029
Interest rate	1.20%	1.20%
Description of floating rate basis	Euribor + 0.564%	Euribor + 0.564%
Basis spread on floating rate	0.564%	0.564%
1.31% due 2031, floating interest rate at Euribor + 0.583% [Member]
Debt Instrument [Line Items]
Long-term debt maturity date	2031	2031
Interest rate	1.31%	1.31%
Description of floating rate basis	Euribor + 0.583%	Euribor + 0.583%
Basis spread on floating rate	0.583%	0.583%
0.89% due 2031, floating interest rate at Euribor + 0.660% [Member]
Debt Instrument [Line Items]
Long-term debt maturity date	2031	2031
Interest rate	0.89%	0.89%
Description of floating rate basis	Euribor + 0.660%	Euribor + 0.660%
Basis spread on floating rate	0.66%	0.66%
3.15% due 2027, floating interest rate at Euribor + 0.690% [Member]
Debt Instrument [Line Items]
Long-term debt maturity date	2027	2027
Interest rate	3.15%	3.15%
Description of floating rate basis	Euribor + 0.690%	Euribor + 0.690%
Basis spread on floating rate	0.69%	0.69%
1.85% due 2027, floating interest rate at Euribor + 0.550% [Member]
Debt Instrument [Line Items]
Long-term debt maturity date	2027	2027
Interest rate	1.85%	1.85%
Description of floating rate basis	Euribor + 0.550%	Euribor + 0.550%
Basis spread on floating rate	0.55%	0.55%
2.15% due 2027, floating interest rate at Euribor + 0.850% [Member] | Cassa Depositi e Prestiti SpA ("CDP") [Member]
Debt Instrument [Line Items]
Long-term debt maturity date	2027	2027
Interest rate	2.15%	2.15%
Description of floating rate basis	Euribor + 0.850%	Euribor + 0.850%
Basis spread on floating rate	0.85%	0.85%
Zero-coupon, due 2025 (Tranche A) [Member] | Senior Unsecured Convertible Bonds
Debt Instrument [Line Items]
Long-term debt maturity date	2025	2025	2025
Interest rate	0.00%	0.00%
Zero-coupon, due 2027 (Tranche B) [Member] | Senior Unsecured Convertible Bonds
Debt Instrument [Line Items]
Long-term debt maturity date	2027	2027	2027
Interest rate	0.00%	0.00%
3.86% due 2027, fixed interest rate
Debt Instrument [Line Items]
Long-term debt maturity date	2027	2027
Interest rate	3.86%	3.86%
3.78% due 2042, fixed interest rate
Debt Instrument [Line Items]
Long-term debt maturity date	2042	2042
Interest rate	3.78%	3.78%
0.32% (weighted average), due 2023-2028, fixed interest rate [Member]
Debt Instrument [Line Items]
Interest rate	0.32%	0.32%
0.32% (weighted average), due 2023-2028, fixed interest rate [Member] | Minimum [Member]
Debt Instrument [Line Items]
Long-term debt maturity date	2023	2023
0.32% (weighted average), due 2023-2028, fixed interest rate [Member] | Maximum [Member]
Debt Instrument [Line Items]
Long-term debt maturity date	2028	2028

X

- Definition

Debt Instrument Maturity Year

+ References

No definition available.

+ Details

Name:	stm_DebtInstrumentMaturityYear
Namespace Prefix:	stm_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Description of reference rate used for variable rate of debt instrument.

+ References

No definition available.

+ Details

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

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_DebtInstrumentAxis=stm_FundingProgramLoansDueTwoThousandAndTwentyEightFloatingInterestRateAtEuriborOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=stm_FundingProgramLoansDueTwoThousandAndTwentyNineFloatingInterestRateAtEuriborTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=stm_FundingProgramLoansDueTwoThousandAndThirtyOneFloatingInterestRateAtEuriborOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=stm_FundingProgramLoansDueTwoThousandAndThirtyOneFloatingInterestRateAtEuriborTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=stm_CreditFacilityDueTwoThousandAndTwentySevenFloatingInterestRateAtEuriborOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=stm_CreditFacilityDueTwoThousandAndTwentySevenFloatingInterestRateAtEuriborTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=stm_CreditFacilityDueTwoThousandAndTwentySevenFloatingInterestRateAtEuriborThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=stm_CassaDepositiPrestitiSpACDPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=stm_ZeroCouponDueTwoThousandAndTwentyFiveTrancheAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=stm_SeniorUnsecuredConvertibleBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=stm_ZeroCouponDueTwoThousandAndTwentySevenTrancheBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=stm_FinanceLeasesThreePointEightSixPercentageDueTwoThousandTwentySevenFixedInterestRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=stm_FinanceLeasesThreePointSevenEightPercentageDueTwoThousandFortyTwoFixedInterestRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=stm_ZeroPointThreeTwoPercentageWeightedAverageDueTwoThousandAndTwentyThreeToTwoThousandAndTwentyEightFixedInterestRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: