Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended				12 Months Ended				12 Months Ended
	Dec. 29, 2007	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011	Dec. 31, 2007	Dec. 29, 2012 Cliffstar [Member]	Dec. 31, 2011 Cliffstar [Member]	Jan. 01, 2011 Cliffstar [Member]	Aug. 17, 2010 Cliffstar [Member]	Dec. 29, 2012 Capital Commitments [Member]	Dec. 27, 2008 GE Obligation [Member]
Operating Leased Assets [Line Items]
Sublease income		$ 0.3
Purchase commitments		175.0								15.8
Purchase obligation amount					39.7
Payments to purchase obligation	16.5
Capital lease obligation											32.5
Future minimum lease payments due in year one											8.8
Future minimum lease payments due in year two											8.8
Future minimum lease payments due in year three											5.3
Future minimum lease payments due in year four											5.3
Future minimum lease payments due in year five											1.7
Future minimum lease payments due thereafter											1.7
Acquisition, contingent consideration payable upon achievement of milestones									15.0
Acquisition, contingent consideration						0.6		32.2	55.0
Interim payments to the seller							29.6
Settlement of seller's objections to contingent consideration							4.7
Settlement of seller's objections to contingent consideration							0.9
Additional contingent consideration for business acquisition			12.1				12.1
Deferred consideration payments						0.6	0.9
Standby letters of credit outstanding		$ 11.0	$ 9.7	$ 12.6