CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 25, 2016	Jun. 27, 2015	Jun. 25, 2016	Jun. 27, 2015
Statement of Comprehensive Income [Abstract]
Net earnings	$ 478,187	$ 482,741	$ 1,060,076	$ 1,031,659
Other comprehensive earnings:
Unrealized gain (loss) on AFS securities net income taxes	21,791	(705)	32,756	(3,917)
Reclassification adjustment for net realized gain on AFS securities net of income taxes	(731)	(14,032)	(4,226)	(23,465)
Adjustment to postretirement benefit plan obligation net of income taxes	0	145	0	290
Comprehensive earnings	$ 499,247	$ 468,149	$ 1,088,606	$ 1,004,567