CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended						4 Months Ended		12 Months Ended
	Dec. 30, 2017	Oct. 07, 2017	Jul. 15, 2017	Dec. 31, 2016	Oct. 08, 2016	Jul. 16, 2016	Apr. 22, 2017	Apr. 23, 2016	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Net sales	$ 2,036,986	$ 2,182,233	$ 2,263,727	$ 2,082,891	$ 2,248,855	$ 2,256,155	$ 2,890,838	$ 2,979,778	$ 9,373,784	$ 9,567,679	$ 9,737,018
Cost of sales, including purchasing and warehousing costs									5,288,735	5,311,764	5,314,246
Gross profit	873,569	947,708	993,088	907,564	988,205	1,010,257	1,270,684	1,349,889	4,085,049	4,255,915	4,422,772
Selling, general and administrative expenses									3,514,837	3,468,317	3,596,992
Operating income									570,212	787,598	825,780
Other, net:
Interest expense									(58,801)	(59,910)	(65,408)
Other income (expense), net									8,848	11,147	(7,484)
Total other, net									(49,953)	(48,763)	(72,892)
Income before provision for income taxes									520,259	738,835	752,888
Provision for income taxes									44,754	279,213	279,490
Net income	$ 184,500	$ 95,996	$ 87,049	$ 62,365	$ 113,844	$ 124,600	$ 107,960	$ 158,813	$ 475,505	$ 459,622	$ 473,398
Basic earnings per common share	$ 2.50	$ 1.30	$ 1.18	$ 0.84	$ 1.54	$ 1.69	$ 1.46	$ 2.16	$ 6.44	$ 6.22	$ 6.45
Weighted average common shares outstanding									73,846	73,562	73,190
Diluted earnings per common share	$ 2.49	$ 1.30	$ 1.17	$ 0.84	$ 1.53	$ 1.68	$ 1.46	$ 2.14	$ 6.42	$ 6.20	$ 6.40
Weighted average common shares outstanding - assuming dilution									74,110	73,856	73,733
Dividends declared per common share									$ 0.24	$ 0.24	$ 0.24