Restructuring and Other Charges - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 29, 2012	Jun. 29, 2012	Jul. 01, 2011
Restructuring Cost and Reserve [Line Items]
Restructuring expense	$ 0.9	$ 106.9	$ 1.0
January 2012 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Expected workforce reductions		490
Restructuring expense	0.8	105.3
Expected total cash payments		29.6
July 2011 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring expense	0.1	1.7
Cumulative pretax restructuring charges incurred to date		21.4
Expected total cash payments		18.5
Optical segment | January 2012 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Cumulative pretax restructuring charges incurred to date		4.0
Optical segment | July 2011 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Cumulative pretax restructuring charges incurred to date		8.4
Data segment | January 2012 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Cumulative pretax restructuring charges incurred to date		98.2
Data segment | July 2011 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Cumulative pretax restructuring charges incurred to date		7.3
Access segment | January 2012 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Cumulative pretax restructuring charges incurred to date		1.3
Access segment | July 2011 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Cumulative pretax restructuring charges incurred to date		1.7
Services segment | January 2012 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Cumulative pretax restructuring charges incurred to date		1.8
Services segment | July 2011 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Cumulative pretax restructuring charges incurred to date		4.0
Severance and other termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring expense	(2.0)	22.1	1.2
Severance and other termination benefits | Previous Restructuring Plans
Restructuring Cost and Reserve [Line Items]
Restructuring expense		0.1
Severance and other termination benefits | January 2012 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Expected pretax charges		21
Restructuring expense		21.3
Redcution to severance	(1.6)
Severance and other termination benefits | July 2011 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring expense		0.9
Redcution to severance	(0.4)
Cumulative pretax restructuring charges incurred to date		15.4
Facility- And Asset-Related Charges | January 2012 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Expected pretax charges		37
Restructuring expense	2.4	35.1
Facility- And Asset-Related Charges | July 2011 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring expense	0.5	0.8
Cumulative pretax restructuring charges incurred to date		5.4
Accelerated amortization of intangible assets
Restructuring Cost and Reserve [Line Items]
Restructuring expense		47.7
Accelerated amortization of intangible assets | January 2012 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Expected pretax charges		48
Restructuring expense		47.7
Other Obligation | January 2012 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring expense		1.2
Other Obligation | July 2011 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Cumulative pretax restructuring charges incurred to date		$ 0.6