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		6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Net Income (Loss) Available to Common Stockholders, Basic	$ 126,969	$ 169,357	$ 293,188	$ 329,358
Net Income (Loss) Available to Common Stockholders, Diluted	$ 126,969	$ 169,357	$ 293,188	$ 329,358
Basic weighted average shares outstanding	321,280	330,206	322,485	331,479
Stock options and non-vested shares, incremental shares	3,382	3,356	3,013	3,744
Diluted weighted average shares outstanding	324,662	333,562	325,498	335,223
Basic earnings per share	$ 0.40	$ 0.51	$ 0.91	$ 0.99
Diluted earnings per share	$ 0.39	$ 0.51	$ 0.90	$ 0.98