Consolidated Revenue by Segment (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2013	Jun. 29, 2012	Jun. 28, 2013	Jun. 29, 2012
Segment Reporting Information [Line Items]
Total revenue	$ 212.1	$ 288.1	$ 421.5	$ 546.0
Optical Segment
Segment Reporting Information [Line Items]
Total revenue	112.7	122.4	205.8	226.8
Data segment
Segment Reporting Information [Line Items]
Total revenue	35.8	77.7	68.7	147.1
Access segment
Segment Reporting Information [Line Items]
Total revenue	19.4	37.3	58.4	73.2
Services segment
Segment Reporting Information [Line Items]
Total revenue	$ 44.2	$ 50.7	$ 88.6	$ 98.9