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Pension Plans (Summary Of Changes In Fair Value Of Foreign Plan Assets With Level 3 Inputs) (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 29, 2012
Dec. 31, 2011
Domestic Pension Plans [Member]
    
Pension Plans, Postretirement and Other Employee Benefits [Line Items]    
Beginning balance $ 152.4 $ 144.6
Realized gains (losses) on assets sold 5.2 4.0
Unrealized gains (losses) attributable to assets held 3.3 2.6
Net purchases and settlements 2.7 1.2
Ending balance 163.6 152.4
Hedge Fund Interests [Member] | Domestic Pension Plans [Member]
    
Pension Plans, Postretirement and Other Employee Benefits [Line Items]    
Beginning balance 68.6 73.5
Realized gains (losses) on assets sold 1.0 0.5
Unrealized gains (losses) attributable to assets held 5.0 (1.8)
Net purchases and settlements 0.4 (3.6)
Ending balance 75.0 68.6
Hedge Fund Interests [Member] | Foreign Pension Plans [Member]
    
Pension Plans, Postretirement and Other Employee Benefits [Line Items]    
Beginning balance 16.5 16.2
Unrealized gains (losses) attributable to assets held 2.0 0.3
Net purchases and settlements 1.5  
Ending balance 20.0 16.5
Private Equity Partnership Interests [Member] | Domestic Pension Plans [Member]
    
Pension Plans, Postretirement and Other Employee Benefits [Line Items]    
Beginning balance 49.9 41.4
Realized gains (losses) on assets sold 4.0 3.3
Unrealized gains (losses) attributable to assets held (5.1) 1.0
Net purchases and settlements 0.8 4.2
Ending balance 49.6 49.9
Real Estate Interests [Member] | Domestic Pension Plans [Member]
    
Pension Plans, Postretirement and Other Employee Benefits [Line Items]    
Beginning balance 33.9 29.7
Realized gains (losses) on assets sold 0.2 0.2
Unrealized gains (losses) attributable to assets held 3.4 3.4
Net purchases and settlements 1.5 0.6
Ending balance $ 39.0 $ 33.9