Debt Hedged by Interest Rate Derivatives

No definition available.

Name:	smtc_DebtHedgedByInterestRateDerivatives
Namespace Prefix:	smtc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument, LIBOR Portion Of Fixed Rate

+ References

No definition available.

+ Details

Name:	smtc_DebtInstrumentLIBORPortionOfFixedRate
Namespace Prefix:	smtc_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

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

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-5

+ Details

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

- Definition

Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Gain (loss) incurred in hedging activities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A

+ Details

Name:	us-gaap_GainLossOnOilAndGasHedgingActivity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	smtc_TriggeringEventAxis=smtc_TriggeringEventTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Derivatives and Hedging Activities - Narrative (Details) - USD ($) $ in Millions	3 Months Ended			12 Months Ended
	Apr. 30, 2023	Jan. 29, 2023	Apr. 26, 2020	Jan. 25, 2026	Jan. 26, 2025	Jan. 28, 2024
Triggering Event Two
Derivative [Line Items]
LIBOR portion of fixed rate			0.73%
Derivative fixed rate	3.58%	3.44%			3.58%
Term loans \| Credit Agreement \| Line of Credit
Derivative [Line Items]
Derivative term	2 years 9 months	5 years
Debt hedged by interest rate derivatives	$ 150.0	$ 450.0			$ 150.0
Revolving loans \| Credit Agreement \| Line of Credit
Derivative [Line Items]
Debt hedged by interest rate derivatives			$ 150.0
Interest Rate Swap
Derivative [Line Items]
Derivative term			3 years
Gain (loss) on derivative				$ 0.2	$ 9.2	$ 10.2