Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016
Statement Of Income And Comprehensive Income [Abstract]
NET SALES	$ 6,204,194	$ 5,840,963	$ 18,151,273	$ 17,240,870
COST OF GOODS SOLD	5,105,632	4,808,426	15,007,354	14,214,528
Gross profit	1,098,562	1,032,537	3,143,919	3,026,342
OPERATING EXPENSES:
Distribution, selling and administrative costs	907,830	902,784	2,748,513	2,689,339
Restructuring charges	702	14,662	3,279	38,799
Total operating expenses	908,532	917,446	2,751,792	2,728,138
OPERATING INCOME	190,030	115,091	392,127	298,204
INTEREST EXPENSE—Net	43,211	48,956	126,099	189,759
LOSS ON EXTINGUISHMENT OF DEBT		11,483		53,632
Income before income taxes	146,819	54,652	266,028	54,813
INCOME TAX PROVISION (BENEFIT)	51,268	(78,359)	78,203	(78,117)
NET INCOME	95,551	133,011	187,825	132,930
OTHER COMPREHENSIVE INCOME (LOSS)—Net of tax:
Changes in retirement benefit obligations, net of tax	1,059	8,036	3,596	(8,207)
Unrecognized gain on interest rate swaps, net of tax	2,445		2,445
COMPREHENSIVE INCOME	$ 99,055	$ 141,047	$ 193,866	$ 124,723
NET INCOME PER SHARE
Basic	$ 0.43	$ 0.60	$ 0.84	$ 0.69
Diluted	$ 0.42	$ 0.59	$ 0.83	$ 0.68
WEIGHTED-AVERAGE COMMON SHARES OUTSTANDING
Basic	223,807,520	220,608,821	222,641,854	193,269,252
Diluted	225,862,274	225,054,051	226,325,711	196,805,990
DISTRIBUTION DECLARED AND PAID
Distribution declared and paid per share (Note 12)				$ 3.94