Stock Transactions And Stock-Based Compensation (Components of Stock-Based Compensation Program) (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 03, 2020	Mar. 29, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pretax compensation expense	$ 45.2	$ 35.1
Income tax benefit	(9.3)	(7.3)
Total stock-based compensation expense, net of income taxes	35.9	27.8
Restricted stock units (“RSUs”)/performance stock units (“PSUs”)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pretax compensation expense	27.6	21.7
Income tax benefit	(5.7)	(4.5)
Total stock-based compensation expense, net of income taxes	21.9	17.2
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pretax compensation expense	17.6	13.4
Income tax benefit	(3.6)	(2.8)
Total stock-based compensation expense, net of income taxes	$ 14.0	$ 10.6