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Leases - Additional Information (Detail)	12 Months Ended
	Dec. 29, 2025
Leases [Abstract]
Operating and finance leases expire	various dates through 2043

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- Definition

Lessee operating lease and finance lease expire description.

+ References

No definition available.

+ Details

Name:	ttmi_LesseeOperatingLeaseAndFinanceLeaseExpireDescription
Namespace Prefix:	ttmi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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