Maturities of Operating Lease Liabilities (Parenthetical) (Detail)	Sep. 28, 2020 USD ($)
Leases [Abstract]
Legally binding lease payments for leases signed but not yet commenced	$ 969,000

Lessee, operating lease, lease not yet commenced, liability incurred.

No definition available.

Name:	ttmi_LesseeOperatingLeaseLeaseNotYetCommencedLiabilityIncurred
Namespace Prefix:	ttmi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant