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Postretirement Plans - Summary of Components of Net Periodic Benefit Costs and Other Amounts Recognized in Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Jan. 02, 2016
Jan. 03, 2015
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 19.3 $ 20.0  
Interest cost 56.5 53.2  
U.S. Postretirement Health Care Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 0.1 0.1 $ 0.1
Interest cost 2.2 2.2 2.5
Expected return on plan assets (0.9) (1.0) (1.1)
Amortization of unrecognized (gain) loss (0.1) 0.3  
Net periodic benefit cost 1.3 1.6 1.5
Net (gain) loss $ (0.3) $ (2.1) $ 1.8