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		9 Months Ended
	Sep. 29, 2023	Sep. 30, 2022	Sep. 29, 2023	Sep. 30, 2022
Numerator:
Net income	$ 74.9	$ 85.8	$ 248.3	$ 364.1
Denominator:
Weighted-average number of common shares used in basic earnings per share (in shares)	248.6	247.5	248.0	249.1
Effect of dilutive securities (in shares)	1.1	1.4	1.1	1.7
Weighted-average number of common shares and dilutive potential common shares used in diluted earnings per share (in shares)	249.7	248.9	249.1	250.8
Basic earnings per share (in usd per share)	$ 0.30	$ 0.35	$ 1.00	$ 1.46
Diluted earnings per share (in usd per share)	$ 0.30	$ 0.34	$ 1.00	$ 1.45
Antidilutive weighted-average shares (in shares)	1.3	1.7	1.7	1.5