Amounts Reclassified from Accumulated Other Comprehensive Income to Net Loss (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
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other expense, net	$ (1.2)	$ (1.1)		$ (2.1)
Income tax expense	(3.0)	(6.8)	0	(10.5)
Net Loss	(7.8)	(4.7)	(63.7)	(144.5)
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Net Gain (Loss) on Available-for-Sale Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other expense, net	(0.1)	0.3	2.6	0.3
Income tax expense		(0.1)	(0.6)
Net Loss	$ (0.1)	$ 0.2	$ 2.0	$ 0.3