Fair Value Measurements (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Millions	Jan. 01, 2021	Jan. 03, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other current liabilities	$ 12.3
Contingent consideration, undiscounted maximum payment	18.3
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan assets	41.9	$ 36.2
Derivatives assets	0.9	0.3
Total assets measured at fair value	42.8	36.5
Deferred compensation plan liabilities	41.9	36.2
Derivatives liabilities	0.5	1.0
Contingent consideration liabilities	12.3	19.9
Total liabilities measured at fair value	54.7	57.1
Fair Value, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan assets	41.9	36.2
Derivatives assets	0.0	0.0
Total assets measured at fair value	41.9	36.2
Deferred compensation plan liabilities	41.9	36.2
Derivatives liabilities	0.0	0.0
Contingent consideration liabilities	0.0	0.0
Total liabilities measured at fair value	41.9	36.2
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	0.9	0.3
Total assets measured at fair value	0.9	0.3
Deferred compensation plan liabilities	0.0	0.0
Derivatives liabilities	0.5	1.0
Contingent consideration liabilities	0.0	0.0
Total liabilities measured at fair value	0.5	1.0
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	12.3	19.9
Total liabilities measured at fair value	$ 12.3	$ 19.9