CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 24, 2022	Jun. 25, 2022	Mar. 26, 2022	Sep. 25, 2021	Jun. 26, 2021	Mar. 27, 2021	Sep. 24, 2022	Sep. 25, 2021
Statement of Comprehensive Income [Abstract]
Net earnings	$ 394,052			$ 856,906			$ 1,640,483	$ 3,361,403
Other Comprehensive Earnings [Abstract]
Unrealized loss on debt securities net of income taxes in 2022 and 2021, respectively.	(119,057)			(12,611)			(668,784)	(103,182)
Reclassification adjustment for net realized loss (gain) on debt securities net of income taxes in 2022 and 2021, respectively.	1,889			(6,258)			981	(15,174)
Adjustment to postretirement benefit obligation net of income taxes in 2022 and 2021, respectively.	339			1,378			1,016	4,137
Comprehensive earnings	$ 277,223	$ 453,578	$ 242,895	$ 839,415	$ 1,020,428	$ 1,387,341	$ 973,696	$ 3,247,184