Consolidated Revenue by Segment (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 28, 2012	Sep. 28, 2012	Jun. 29, 2012	Mar. 30, 2012	Dec. 30, 2011	Sep. 30, 2011	Jul. 01, 2011	Apr. 01, 2011	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Total revenue	$ 242.2	$ 264.4	$ 288.1	$ 257.9	$ 316.8	$ 329.8	$ 316.7	$ 322.4	$ 1,052.6	$ 1,285.7	$ 1,642.3
Optical Segment
Segment Reporting Information [Line Items]
Segment Revenue									432.0	482.1	644.2
Data segment
Segment Reporting Information [Line Items]
Segment Revenue									265.5	413.9	557.7
Access segment
Segment Reporting Information [Line Items]
Segment Revenue									156.5	166.4	198.1
Services segment
Segment Reporting Information [Line Items]
Segment Revenue									$ 198.6	$ 223.3	$ 242.3