Revenue from contract with customer.

No definition available.

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- Definition

Revenue from products and services transferred to customers percentage.

+ References

No definition available.

+ Details

Name:	ttmi_RevenueFromProductsAndServicesTransferredToCustomersPercentage
Namespace Prefix:	ttmi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-8

+ Details

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

- Definition

Losses recognized in the current period on contracts which are expected to generate losses, which are probable and can be reasonably estimated, in a future period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 605
-SubTopic 35
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481187/605-35-45-1

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage of remaining performance obligation to total remaining performance obligation not recognized as revenue.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)(1)
-SubTopic 10
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-13

+ Details

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

- Details

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Namespace Prefix:
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- Details

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Revenues - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 29, 2025	Sep. 30, 2024	Sep. 29, 2025	Sep. 30, 2024	Dec. 30, 2024
Revenue From Contract With Customer [Line Items]
Remaining revenue performance obligation, percentage	57.00%		57.00%
Estimated remaining costs to complete loss contracts			$ 32,275		$ 36,976
Revenue recognized from contract liabilities			$ 82,722	$ 33,331
Transferred over Time
Revenue From Contract With Customer [Line Items]
Revenue from products and services transferred to customers, percentage	96.00%	96.00%	96.00%	96.00%
Transferred at Point in Time
Revenue From Contract With Customer [Line Items]
Revenue from products and services transferred to customers, percentage	4.00%	4.00%	4.00%	4.00%