CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
Income Statement [Abstract]
Net sales	$ 7,256,382	$ 6,779,579	$ 6,226,507
Cost of merchandise sold	4,764,417	4,454,377	4,083,333
Gross profit	2,491,965	2,325,202	2,143,174
Selling, general and administrative expenses	1,639,749	1,488,164	1,369,097
Depreciation and amortization	165,834	142,958	123,569
Operating income	686,382	694,080	650,508
Interest expense, net	13,859	5,810	2,891
Income before income taxes	672,523	688,270	647,617
Income tax expense	249,924	251,150	237,222
Net income	$ 422,599	$ 437,120	$ 410,395
Net income per share – basic	$ 3.31	$ 3.29	$ 3.03
Net income per share – diluted	$ 3.30	$ 3.27	$ 3.00
Weighted average shares outstanding
Basic	127,588	132,905	135,582
Diluted	128,204	133,813	136,845
Dividends declared per common share outstanding	$ 1.05	$ 0.92	$ 0.76