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Goodwill	6 Months Ended
Jul. 01, 2011
Goodwill [Abstract]
Goodwill	3. Goodwill We review goodwill annually for impairment, unless potential interim indicators exist that could result in an impairment. Given that we have experienced a significant decline in business volumes from a major customer that has had an adverse impact on the results of the Broadband segment which is not expected to reverse in the near-term, and that Tellabs' overall market capitalization has been below book value, we completed an interim step one review. Based on this review, which compares the segment's fair value to carrying value, we concluded that Broadband segment goodwill may potentially be impaired. At this time, we cannot estimate the impact, if any, this may have on our financial statements. We will proceed with a step two analysis to determine whether or not an impairment charge is to be recorded. The amount of goodwill associated with the Broadband segment is $82.7 million.

Goodwill

6 Months Ended

Jul. 01, 2011

3. Goodwill

We review goodwill annually for impairment, unless potential interim indicators exist that could result in an impairment. Given that we have experienced a significant decline in business volumes from a major customer that has had an adverse impact on the results of the Broadband segment which is not expected to reverse in the near-term, and that Tellabs' overall market capitalization has been below book value, we completed an interim step one review. Based on this review, which compares the segment's fair value to carrying value, we concluded that Broadband segment goodwill may potentially be impaired. At this time, we cannot estimate the impact, if any, this may have on our financial statements. We will proceed with a step two analysis to determine whether or not an impairment charge is to be recorded. The amount of goodwill associated with the Broadband segment is $82.7 million.