Retirement and Post Retirement Health Care Plans (Schedule Of Reconciliation Of Funded Status Of The Defined Benefit Plans) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Change in Fair Value of Plan Assets:
Fair Value of Plan Assets at Beginning of Period	$ 174.0
Employer Contributions	10.8	$ 10.9
Fair Value of Plan Assets at End of Period	203.4	174.0
United States
Change in Fair Value of Plan Assets:
Employer Contributions	8.9	10.1	$ 9.3
International Plan
Change in Fair Value of Plan Assets:
Employer Contributions	10.6	11.8	9.4
Pension Plan
Change in Projected Benefit Obligation:
Obligation at Beginning of Period	265.1	278.0
Service Cost	6.2	7.3	7.2
Interest Cost	10.6	9.3	9.3
Actuarial Gain	34.9	(14.9)
Curtailment Gain	(19.4)	0.0
Less: Benefits Paid	14.8	13.3
Foreign Currency Translation	0.2	(1.3)
Obligation at End of Period	282.8	265.1	278.0
Change in Fair Value of Plan Assets:
Fair Value of Plan Assets at Beginning of Period	174.0	185.3
Actual Return on Plan Assets	33.1	(8.2)
Employer Contributions	10.8	10.9
Less: Benefits Paid	14.8	13.3
Foreign Currency Translation	0.3	(0.7)
Fair Value of Plan Assets at End of Period	203.4	174.0	185.3
Funded Status	(79.4)	(91.1)
Pension Plan \| United States
Change in Fair Value of Plan Assets:
Funded Status	(71.2)	(82.4)
Pension Plan \| International Plan
Change in Fair Value of Plan Assets:
Funded Status	(8.2)	(8.7)
Postretirement Health Coverage
Change in Projected Benefit Obligation:
Obligation at Beginning of Period	9.2	12.1
Service Cost	0.0	0.1	0.1
Interest Cost	0.3	0.4	0.4
Actuarial Gain	(0.7)	(2.8)
Amendments	(1.9)	0.0
Curtailment Gain	(0.5)	0.0
Participant Contributions	0.2	0.4
Less: Benefits Paid	0.7	1.0
Obligation at End of Period	5.9	9.2	$ 12.1
Change in Fair Value of Plan Assets:
Employer Contributions	$ 0.4	$ 0.6

Amount of increase (decrease) in accumulated benefit obligation from change in existing term of defined benefit plan or initiation of new defined benefit 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.

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Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan.

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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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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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

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Amount of (increase) decrease in benefit obligation of defined benefit plan from event reducing expected years of future service of present employees or eliminating accrual of benefits for some or all future services of present employees.

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Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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

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Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status.

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Amount of cost recognized for passage of time related to defined benefit plan.

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

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