Segment Information (Consolidated Revenue By Segment) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 30, 2011	Sep. 30, 2011	Jul. 01, 2011	Apr. 01, 2011	Dec. 31, 2010	Oct. 01, 2010	Jul. 02, 2010	Apr. 02, 2010	Dec. 30, 2011	Dec. 31, 2010	Jan. 01, 2010
Segment Reporting Information [Line Items]
Revenue	$ 316.8	$ 329.8	$ 316.7	$ 322.4	$ 410.5	$ 429.8	$ 422.8	$ 379.2	$ 1,285.7	$ 1,642.3	$ 1,525.7
Broadband Segment [Member]
Segment Reporting Information [Line Items]
Consolidated revenue									670.6	846.0	785.8
Transport Segment [Member]
Segment Reporting Information [Line Items]
Consolidated revenue									391.8	554.0	509.6
Services Segment [Member]
Segment Reporting Information [Line Items]
Consolidated revenue									$ 223.3	$ 242.3	$ 230.3