CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Net sales	$ 6,461,387	$ 6,922,827	$ 18,725,380	$ 19,984,387
Cost of sales	6,017,278	6,505,067	17,578,056	18,757,395
Restructuring charges	13,632	60,435	174,995	89,512
Gross profit	430,477	357,325	972,329	1,137,480
Selling, general and administrative expenses	217,904	237,556	632,838	722,608
Intangible amortization	15,598	20,308	48,903	57,059
Restructuring charges	984	5,408	24,128	10,921
Interest and other, net	36,207	54,087	135,650	136,889
Other charges (income), net	14,395	71,879	17,005	(8,515)
Income (loss) before income taxes	145,389	(31,913)	113,805	218,518
Provision for income taxes	34,001	13,256	74,485	60,767
Net income (loss)	$ 111,388	$ (45,169)	$ 39,320	$ 157,751
Earnings (loss) per share:
Basic (in dollars per share)	$ 0.22	$ (0.09)	$ 0.08	$ 0.30
Diluted (in dollars per share)	$ 0.22	$ (0.09)	$ 0.08	$ 0.30
Weighted-average shares used in computing per share amounts:
Basic (in shares)	506,938	524,876	511,198	528,528
Diluted (in shares)	510,339	524,876	514,549	532,308