Income Taxes (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 31, 2010
Income Taxes [Line Items]
Increased (decrease) in valuation allowance	$ (6.3)	$ 21.2
Federal and foreign tax operating loss carry-forwards	640.1
Accrual for uncertain tax positions, that, if recognized would affect the effective income tax rate	4.1
Uncertain tax positions, net expense related to interest and penalties	4.4
Interest on income taxes accrued	0.2
Income tax expense, estimated amount for next quarter	2.1
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax, Portion Attributable to Parent	1.8
State and Local Jurisdiction [Member]
Income Taxes [Line Items]
Federal and foreign tax operating loss carry-forwards	$ 9.4