CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net earnings	$ 677,744	$ 474,927	$ 1,974,187	$ 1,525,270
Other comprehensive earnings:
Unrealized (loss) on debt securities net of income taxes in 2018. Unrealized gain on debt and equity securities net of income taxes in 2017.	(2,076)	49,043	(28,657)	111,585
Reclassification adjustment for net realized (gain) loss on debt securities net of income taxes in 2018. Reclassification adjustment for net realized (gain) on debt and equity securities net of income taxes in 2017.	(181)	(6,334)	266	(64,355)
Adjustment to postretirement benefit obligation net of income taxes in 2018.	564	0	1,693	0
Comprehensive earnings	$ 676,051	$ 517,636	$ 1,947,489	$ 1,572,500

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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