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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 30, 2011
Subsequent Events [Abstract]
Subsequent Events	20. Subsequent Events On January 30, 2012, management initiated a restructuring plan that aligns expenses with revenue. Tellabs is stopping new development on the Tellabs SmartCore 9100 product and consolidating research and development into fewer locations. Actions under this plan are expected to be substantially completed by the end of the first quarter of 2013. We expect to record a pretax charge, substantially all of which is expected to be incurred in the first quarter of 2012, currently estimated at $107 million. The pretax charges will consist of $22 million for workforce reductions of approximately 530 employees, $37 million for facility- and asset-related charges, and an estimated $48 million for intangible asset write downs. Estimated cash payments under this plan are expected to be $31 million beginning in the first quarter of 2012 and continuing through the end of 2017.