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Stock Repurchase Program - Narrative (Details) - USD ($)	Mar. 11, 2021	Oct. 30, 2022
Equity [Abstract]
Additional stock repurchase amount authorized	$ 350,000,000
Shares repurchased to date, value		$ 589,000,000
Remaining authorization under stock repurchase program		$ 209,400,000

X

- Definition

Stock Repurchase Program, Amount Repurchased To Date

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

X

- Definition

Stock Repurchase Program, Increase In Authorized Amount

+ References

No definition available.

+ Details

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Namespace Prefix:	smtc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

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- References

No definition available.

+ Details

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

X

- Definition

Amount remaining of a stock repurchase plan authorized.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant