Stock Transactions And Stock-Based Compensation (Components Of Stock-Based Compensation Program) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2017	Sep. 30, 2016	Sep. 29, 2017	Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pretax compensation expense	$ 33.4	$ 31.4	$ 104.8	$ 96.3
Income tax benefit	(10.2)	(9.4)	(32.5)	(28.8)
Stock-based compensation expense, net of income taxes	23.2	22.0	72.3	67.5
Restricted stock units (“RSUs”)/performance stock units (“PSUs”)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pretax compensation expense	21.9	21.1	67.6	65.0
Income tax benefit	(6.6)	(6.2)	(20.7)	(19.1)
Stock-based compensation expense, net of income taxes	15.3	14.9	46.9	45.9
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pretax compensation expense	11.5	10.3	37.2	31.3
Income tax benefit	(3.6)	(3.2)	(11.8)	(9.7)
Stock-based compensation expense, net of income taxes	$ 7.9	$ 7.1	$ 25.4	$ 21.6