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Pension Plans - Summary of Change in Fair Value of Plan Assets (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016
Compensation and Retirement Disclosure [Abstract]
Fair value of plan assets at beginning of year	$ 1,049.2	$ 1,103.4
Actual return (loss) on plan assets	73.5	(17.8)
Plan participant contributions	1.0	1.1
Employer contributions	68.7	39.2
Benefits paid	(63.2)	(62.4)
Foreign currency impact	(18.4)	(14.3)
Fair value of plan assets at end of year	1,110.8	1,049.2
Unfunded status at end of year	$ (250.6)	$ (230.2)

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Defined benefit plan, unfunded status of plan

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The difference between fair value of plan assets at the end of the period and the fair value at the beginning of the period, adjusted for contributions and payments of benefits during the period, and after adjusting for taxes and other expenses, as applicable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets.

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

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Fair value of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and employees.

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The amount of increase or decrease in plan assets attributed to foreign currency changes. The effects of foreign currency exchange rate changes that are to be disclosed are those applicable to plans of a foreign operation whose functional currency is not the reporting currency.

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