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Retirement Plans - Schedule of Estimated Future Benefit Payments (Detail) - Defined Benefit Plans
$ in Millions
Oct. 02, 2015
USD ($)
Defined Benefit Plan Disclosure [Line Items]  
2016 $ 6.7
2017 8.9
2018 8.5
2019 9.0
2020 5.6
Thereafter 43.1
Total $ 81.8