Earnings Per Share - Computations of Basic and Diluted Net Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Oct. 03, 2020	Jul. 04, 2020	Apr. 04, 2020	Dec. 31, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Basic net earnings	$ 398,843	$ 193,415	$ 108,881	$ 20,331	$ 107,823	$ 275,031	$ 386,483	$ 501,806	$ 721,470	$ 1,271,143	$ 2,360,767
Earnings allocated to participating securities, Basic									(4,356)	(7,035)	(9,344)
Net earnings available to common stockholders, Basic									$ 717,114	$ 1,264,108	$ 2,351,423
Basic average shares outstanding									303,168	305,040	315,858
Basic net earnings per share	$ 1.31	$ 0.63	$ 0.36	$ 0.07	$ 0.35	$ 0.90	$ 1.26	$ 1.63	$ 2.37	$ 4.14	$ 7.44
Diluted net earnings	$ 398,843	$ 193,415	$ 108,881	$ 20,331	$ 107,823	$ 275,031	$ 386,483	$ 501,806	$ 721,470	$ 1,271,143	$ 2,360,767
Earnings allocated to participating securities, Diluted									(4,359)	(7,034)	(9,317)
Net earnings available to common stockholders, Diluted									$ 717,111	$ 1,264,109	$ 2,351,450
Dilutive effect of stock options and other									103	463	875
Diluted average shares outstanding									303,271	305,503	316,733
Diluted net earnings per share	$ 1.30	$ 0.63	$ 0.36	$ 0.07	$ 0.35	$ 0.90	$ 1.26	$ 1.63	$ 2.36	$ 4.14	$ 7.42