Net (Loss) Earnings Per Share (Narrative) (Details) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Jul. 01, 2011	Jul. 01, 2011
Net (Loss) Earnings Per Share [Abstract]
Diluted weighted average shares outstanding in the absence of a loss	365.9	365.9

Diluted weighted average shares outstanding if the entity had not reported a net loss for the period.

No definition available.

Name:	tlab_WeightedAverageNumberOfDilutedSharesOutstandingInAbsenceOfNetLoss
Namespace Prefix:	tlab_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration