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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
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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

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