CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS - USD ($) $ in Thousands	3 Months Ended
Mar. 30, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net earnings	$ 980,971	$ 680,271
Other comprehensive earnings:
Unrealized gain (loss) on debt securities net of income taxes of $20,292 and $(8,175) in 2019 and 2018, respectively.	59,521	(23,981)
Reclassification adjustment for net realized loss on debt securities net of income taxes of $100 and $8 in 2019 and 2018, respectively.	293	22
Adjustment to postretirement benefit obligation net of income taxes of $193 in 2018.	0	565
Comprehensive earnings	$ 1,040,785	$ 656,877

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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