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, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 31, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Basic net earnings	$ 107,823	$ 275,031	$ 386,483	$ 501,806	$ 646,779	$ 676,656	$ 683,153	$ 354,179	$ 1,271,143	$ 2,360,767	$ 1,318,688
Earnings allocated to participating securities, Basic									(7,035)	(9,344)	(4,549)
Net earnings available to common stockholders, Basic									$ 1,264,108	$ 2,351,423	$ 1,314,139
Average shares outstanding									305,040	315,858	319,990
Basic net earnings per share	$ 0.35	$ 0.90	$ 1.26	$ 1.63	$ 2.08	$ 2.13	$ 2.14	$ 1.11	$ 4.14	$ 7.44	$ 4.11
Diluted net earnings	$ 107,823	$ 275,031	$ 386,483	$ 501,806	$ 646,779	$ 676,656	$ 683,153	$ 354,179	$ 1,271,143	$ 2,360,767	$ 1,318,688
Earnings allocated to participating securities, Diluted									(7,034)	(9,317)	(4,539)
Net earnings available to common stockholders, Diluted									$ 1,264,109	$ 2,351,450	$ 1,314,149
Dilutive effect of stock options and other									463	875	783
Diluted average shares outstanding									305,503	316,733	320,773
Diluted net earnings per share	$ 0.35	$ 0.90	$ 1.26	$ 1.63	$ 2.07	$ 2.13	$ 2.13	$ 1.10	$ 4.14	$ 7.42	$ 4.10