Earnings Per Share (Reconciliation Of The Numerators And The Denominators Of The Basic And Diluted Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Earnings Per Share [Abstract]
Net Income (Loss) Available to Common Stockholders, Basic	$ 81,935	$ 169,381	$ 375,123	$ 498,739
Net Income (Loss) Available to Common Stockholders, Diluted	$ 81,935	$ 169,381	$ 375,123	$ 498,739
Basic weighted average shares outstanding	315,876	329,342	320,282	330,789
Stock options and non-vested shares, incremental shares	3,237	3,595	3,079	3,704
Diluted weighted average shares outstanding	319,113	332,937	323,361	334,493
Basic earnings per share	$ 0.26	$ 0.51	$ 1.17	$ 1.51
Diluted earnings per share	$ 0.26	$ 0.51	$ 1.16	$ 1.49