Earnings Per Share (Schedule Of Computation Of Earnings Per Share And Effect On Weighted-Average Number Of Shares) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jul. 01, 2022	Jun. 30, 2023	Jul. 01, 2022
Numerator:
Net income	$ 44.6	$ 168.0	$ 173.4	$ 278.3
Denominator:
Weighted-average number of common shares used in basic earnings per share (in shares)	248.1	249.2	247.7	250.0
Effect of dilutive securities (in shares)	0.9	1.5	1.2	1.7
Weighted-average number of common shares and dilutive potential common shares used in diluted earnings per share (in shares)	249.0	250.7	248.9	251.7
Basic earnings per share (in usd per share)	$ 0.18	$ 0.67	$ 0.70	$ 1.11
Diluted earnings per share (in usd per share)	$ 0.18	$ 0.67	$ 0.70	$ 1.11
Antidilutive weighted-average shares (in shares)	3.8	2.1	1.9	1.5