Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 2,448,618	$ 2,545,800	$ 2,577,014	$ 2,412,202	$ 2,369,097	$ 2,448,510	$ 2,453,038	$ 2,220,645	$ 9,983,634	$ 9,491,290	$ 8,959,087
Gross profit	646,390	1,825,367	766,555	704,692	753,624	783,301	779,136	680,353	2,838,070	2,996,414	2,812,825
Net income	$ 229,339	$ 227,013	$ 196,586	$ 208,766	$ 240,378	$ 270,025	$ 260,681	$ 200,554	$ 861,704	$ 971,638	$ 930,362
Basic earnings per share (usd per share)	$ 3.07	$ 3.03	$ 2.64	$ 2.80	$ 3.23	$ 3.63	$ 3.51	$ 2.70	$ 11.53	$ 13.07	$ 12.55
Diluted earnings per share (usd per share)	$ 3.05	$ 3.02	$ 2.62	$ 2.78	$ 3.21	$ 3.61	$ 3.48	$ 2.68	$ 11.47	$ 12.98	$ 12.48