SUPPLEMENTAL GUARANTOR AND NON-GUARANTOR CONSOLIDATED FINANCIAL STATEMENTS - Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jul. 01, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 25, 2015	Jun. 26, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Condensed consolidating statements of operations
Net sales	$ 5,862,597	$ 6,114,999	$ 6,008,525	$ 5,876,813	$ 5,772,698	$ 6,763,177	$ 6,316,762	$ 5,566,248	$ 23,862,934	$ 24,418,885	$ 26,147,916
Cost of sales									22,303,231	22,810,824	24,602,576
Restructuring charges									38,758	0	0
Gross profit	$ 384,804	$ 416,455	$ 313,691	$ 405,995	$ 406,337	$ 452,467	$ 396,916	$ 352,341	1,520,945	1,608,061	1,545,340
Selling, general and administrative expenses									937,339	954,890	844,473
Intangible amortization									81,396	65,965	32,035
Restructuring charges									10,637	0	0
Interest and other, net									120,725	132,531	(1,823)
Income before income taxes									370,848	454,675	670,655
Provision for income taxes									51,284	10,594	69,854
Net Income									319,564	444,081	600,801
Income from continuing operations											600,801
Eliminations
Condensed consolidating statements of operations
Net sales									(9,887,106)	(11,708,741)	(12,411,997)
Cost of sales									(9,887,106)	(11,708,741)	(12,411,997)
Restructuring charges									0
Equity in earnings in subsidiaries									(112,531)	(476,533)	(1,646,867)
Net Income									(112,531)	(476,533)	(1,646,867)
Income from continuing operations											(1,646,867)
Parent | Reportable legal entities
Condensed consolidating statements of operations
Intangible amortization									175	300	300
Interest and other, net									(195,848)	(191,859)	10,086
Income before income taxes									195,673	191,559	(10,386)
Provision for income taxes									11	26	0
Equity in earnings in subsidiaries									123,902	252,548	611,187
Net Income									319,564	444,081	600,801
Income from continuing operations											600,801
Guarantor Subsidiaries | Reportable legal entities
Condensed consolidating statements of operations
Net sales									15,909,037	16,841,405	19,016,750
Cost of sales									14,375,249	15,278,265	17,502,863
Restructuring charges									16,908
Gross profit									1,516,880	1,563,140	1,513,887
Selling, general and administrative expenses									282,821	330,194	258,212
Intangible amortization									5,967	3,598	3,808
Restructuring charges									8,716
Interest and other, net									1,102,341	1,016,302	901,059
Income before income taxes									117,035	213,046	350,808
Provision for income taxes									23,629	(41,584)	14,143
Equity in earnings in subsidiaries									(244,696)	(173,846)	564,105
Net Income									(151,290)	80,784	900,770
Income from continuing operations											900,770
Non-Guarantor Subsidiaries | Reportable legal entities
Condensed consolidating statements of operations
Net sales									17,841,003	19,286,221	19,543,163
Cost of sales									17,815,088	19,241,300	19,511,710
Restructuring charges									21,850
Gross profit									4,065	44,921	31,453
Selling, general and administrative expenses									654,518	624,696	586,261
Intangible amortization									75,254	62,067	27,927
Restructuring charges									1,921
Interest and other, net									(785,768)	(691,912)	(912,968)
Income before income taxes									58,140	50,070	330,233
Provision for income taxes									27,644	52,152	55,711
Equity in earnings in subsidiaries									233,325	397,831	471,575
Net Income									$ 263,821	$ 395,749	746,097
Income from continuing operations											$ 746,097