Stock Transactions And Stock-Based Compensation (Components Of Stock-Based Compensation Program) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jul. 01, 2016	Jun. 30, 2017	Jul. 01, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pretax compensation expense	$ 37.8	$ 35.3	$ 71.4	$ 64.9
Income tax benefit	(11.8)	(10.7)	(22.3)	(19.4)
Stock-based compensation expense, net of income taxes	26.0	24.6	49.1	45.5
Restricted stock units (“RSUs”)/performance stock units (“PSUs”)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pretax compensation expense	24.1	24.0	45.7	43.9
Income tax benefit	(7.4)	(7.2)	(14.1)	(12.9)
Stock-based compensation expense, net of income taxes	16.7	16.8	31.6	31.0
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pretax compensation expense	13.7	11.3	25.7	21.0
Income tax benefit	(4.4)	(3.5)	(8.2)	(6.5)
Stock-based compensation expense, net of income taxes	$ 9.3	$ 7.8	$ 17.5	$ 14.5