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Pension Plans - Summary of Amounts in Accumulated OCI to be Amortized Over Next Fiscal Year (Detail)
$ in Millions
12 Months Ended
Jan. 02, 2016
USD ($)
Compensation and Retirement Disclosure [Abstract]  
Amortization of unrecognized loss $ 29.0
Amortization of prior service credit (1.1)
Total to be recognized in net periodic benefit cost $ 27.9