Retirement Plans Narrative (Details) $ in Millions	12 Months Ended
	Dec. 27, 2019 USD ($) contract	Dec. 28, 2018 USD ($) contract	Dec. 29, 2017 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Number of Life Insurance Contract Held in Rabbi Trust | contract	62	118
Deferred Compensation Plan Assets	$ 43.8	$ 58.4
Deferred Compensation Plan Assets, Death Benefit on Insurance Contracts	94.0	142.9
Deferred Compensation Plan Assets, Loans Outstanding Against Insurance Contracts	23.6	43.8
Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Assets Transferred to (from) Plan			$ 212.9
Defined Benefit Plan, Plan Assets, Payment for Settlement			62.3
Employer contributions	1.9	2.4
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement			$ 70.5
Moody's, Aa1 Rating [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Lower Threshold for Discount Rate Basis, Corporate Bonds	$ 250.0
United States
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Percentage of Projected Benefit Obligation	35.00%
Foreign Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Deferred Compensation Plan Assets, Collateral For Plan Benefits	$ 7.3	$ 8.0