CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Net sales	$ 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	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
Other charges (income), net	21,193	47,738	(53,233)
Interest and other, net	99,532	84,793	51,410
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
Earnings per share:
Basic (in dollars per share)	$ 0.59	$ 0.80	$ 1.04
Diluted (in dollars per share)	$ 0.59	$ 0.79	$ 1.02
Weighted-average shares used in computing per share amounts:
Basic (in shares)	540,503	557,667	579,981
Diluted (in shares)	546,220	564,869	591,556