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Pension Plans - Summary of Change in Fair Value of Plan Assets (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Retirement Benefits [Abstract]
Fair value of plan assets at beginning of year	$ 1,110.8	$ 1,049.2
Actual return on plan assets	175.7	73.5
Employer contributions	69.6	68.7
Plan participant contributions	0.6	1.0
Plan settlements	(0.3)
Benefits paid	(66.6)	(63.2)
Foreign currency impact	15.2	(18.4)
Fair value of plan assets at end of year	1,305.0	1,110.8
Unfunded status at end of year	$ (162.6)	$ (250.6)

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Defined benefit plan, unfunded status of plan

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Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses.

+ References

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-Publisher FASB
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-SubTopic 20
-Section 50
-Paragraph 1
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Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.

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Amount of contributions received by defined benefit plan from participant which increase benefit obligation.

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Amount of contribution received by defined benefit plan from employer which increases plan assets.

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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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Amount of foreign currency translation gain (loss) which increases (decreases) plan assets of defined benefit plan.

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Amount of payment, which decreases plan assets of defined benefit plan, for irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Transaction constituting settlement includes, but is not limited to, making lump-sum cash payment to participant in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contract.

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