Quarterly Information (unaudited) Quarterly Results of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 9,365,807	$ 8,858,101	$ 8,826,003	$ 9,345,807	$ 9,014,985	$ 8,586,080	$ 8,482,827	$ 8,752,946	$ 36,395,718	$ 34,836,838	$ 34,274,109
Costs and Expenses	8,681,305	8,274,949	8,183,211	8,511,850	8,270,270	7,951,286	7,869,524	8,012,934	33,651,315	32,104,014	31,522,458
Net earnings	$ 406,980	$ 677,744	$ 616,172	$ 680,271	$ 766,624	$ 474,927	$ 495,072	$ 555,271	$ 2,381,167	$ 2,291,894	$ 2,025,688
Basic and diluted earnings per share (in dollars per share)	$ 0.57	$ 0.94	$ 0.84	$ 0.93	$ 1.04	$ 0.63	$ 0.65	$ 0.73	$ 3.28	$ 3.04	$ 2.63