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Pension Plans - Summary of Benefit Obligations in Excess of Fair Value of Plan Assets (Detail) - USD ($)
$ in Millions
Jan. 02, 2016
Jan. 03, 2015
Compensation and Retirement Disclosure [Abstract]    
Projected benefit obligation $ 1,128.4 $ 1,167.3
Accumulated benefit obligation 1,097.6 1,134.3
Fair value of plan assets $ 906.5 $ 956.2