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Pension Plans - Summary of Changes in Fair Value of Assets With Level 3 Inputs (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 28, 2013
Dec. 29, 2012
Domestic Pension Plans [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Beginning balance $ 163.6 $ 152.4
Realized (losses) gains on assets sold 4.0 5.2
Unrealized gains (losses) attributable to assets held 15.6 3.3
Net purchases and settlements (8.1) 2.7
Ending balance 175.1 163.6
Hedge Funds [Member] | Domestic Pension Plans [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Beginning balance 75.0 68.6
Realized (losses) gains on assets sold (1.5) 1.0
Unrealized gains (losses) attributable to assets held 13.4 5.0
Net purchases and settlements 3.4 0.4
Ending balance 90.3 75.0
Hedge Funds [Member] | Foreign Pension Plans [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Beginning balance 20.0 16.5
Unrealized gains (losses) attributable to assets held 1.5 2.0
Net purchases and settlements 3.3 1.5
Ending balance 24.8 20.0
Private Equity Partnerships [Member] | Domestic Pension Plans [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Beginning balance 49.6 49.9
Realized (losses) gains on assets sold 5.4 4.0
Unrealized gains (losses) attributable to assets held 1.6 (5.1)
Net purchases and settlements (7.2) 0.8
Ending balance 49.4 49.6
Real Estate and Other Real Assets [Member] | Domestic Pension Plans [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Beginning balance 39.0 33.9
Realized (losses) gains on assets sold 0.1 0.2
Unrealized gains (losses) attributable to assets held 0.6 3.4
Net purchases and settlements (4.3) 1.5
Ending balance $ 35.4 $ 39.0