Consolidated Statements of Comprehensive Earnings (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Net earnings	$ 1,552,255	$ 1,491,966	$ 1,338,147
Other comprehensive earnings (losses):
Unrealized gain on available-for-sale (AFS) securities, net of tax effect of $12,567, $6,324 and $8,251 in 2012, 2011 and 2010, respectively	19,956	10,041	13,102
Reclassification adjustment for net realized gain on AFS securities, net of tax effect of ($4,013), ($7,684) and ($9,473) in 2012, 2011 and 2010, respectively	(6,373)	(12,202)	(15,043)
Adjustment to postretirement benefit plan obligation, net of tax effect of ($3,498), ($3,655) and ($1,913) in 2012, 2011 and 2010, respectively	(5,555)	(5,804)	(3,038)
Comprehensive earnings	$ 1,560,283	$ 1,484,001	$ 1,333,168