Fair Value Measurements (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Jan. 01, 2021
Certain Companies Acquired
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, undiscounted maximum payment	$ 14.8
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan assets	44.7	$ 41.9
Derivatives assets	0.1	0.9
Total assets measured at fair value	44.8	42.8
Deferred compensation plan liabilities	44.7	41.9
Derivatives liabilities	0.2	0.5
Contingent consideration liabilities	12.8	12.3
Total liabilities measured at fair value	57.7	54.7
Fair Value, Recurring | Level I
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan assets	44.7	41.9
Derivatives assets	0.0	0.0
Total assets measured at fair value	44.7	41.9
Deferred compensation plan liabilities	44.7	41.9
Derivatives liabilities	0.0	0.0
Contingent consideration liabilities	0.0	0.0
Total liabilities measured at fair value	44.7	41.9
Fair Value, Recurring | Level II
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan assets	0.0	0.0
Derivatives assets	0.1	0.9
Total assets measured at fair value	0.1	0.9
Deferred compensation plan liabilities	0.0	0.0
Derivatives liabilities	0.2	0.5
Contingent consideration liabilities	0.0	0.0
Total liabilities measured at fair value	0.2	0.5
Fair Value, Recurring | Level III
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan assets	0.0	0.0
Derivatives assets	0.0	0.0
Total assets measured at fair value	0.0	0.0
Deferred compensation plan liabilities	0.0	0.0
Derivatives liabilities	0.0	0.0
Contingent consideration liabilities	12.8	12.3
Total liabilities measured at fair value	$ 12.8	$ 12.3