Amount of contributions made by the employer to defined benefit plans.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The amount of net gain (loss) recognized in net periodic benefit cost as a result of an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services.

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-Glossary Plan Curtailment
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Amount of net gain (loss) recognized in net periodic benefit cost as a result of an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include, but are not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contracts to cover vested benefits.

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Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position.

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Pension and Other Postretirement Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Dec. 31, 2016	Oct. 01, 2016	Sep. 26, 2015	Oct. 01, 2016	Sep. 26, 2015
Defined Benefit Plan Disclosure [Line Items]
Curtailment losses					$ 7.7
Pension plans, defined benefit
Defined Benefit Plan Disclosure [Line Items]
Employer's contribution towards defined benefit plan				$ 9.7
U.S. pension
Defined Benefit Plan Disclosure [Line Items]
Curtailment losses		$ 0.0	$ 0.0	0.0	0.0
Settlement loss		$ 0.0	$ 0.1	0.2	$ 0.2
Minimum \| Pension plans, defined benefit
Defined Benefit Plan Disclosure [Line Items]
Estimated employer's contribution towards defined benefit plan in 2016				10.0
Maximum \| Pension plans, defined benefit
Defined Benefit Plan Disclosure [Line Items]
Estimated employer's contribution towards defined benefit plan in 2016				$ 15.0
Scenario, Forecast \| Minimum \| U.S. pension
Defined Benefit Plan Disclosure [Line Items]
Settlement loss	$ 40.0
Scenario, Forecast \| Maximum \| U.S. pension
Defined Benefit Plan Disclosure [Line Items]
Settlement loss	$ 55.0