Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2011		Dec. 31, 2010
Condensed Consolidated Statements Of Operations [Abstract]
Net sales	$ 7,492,723		$ 7,832,856		$ 23,084,816		$ 21,821,074
Cost of sales	7,110,869		7,399,280		21,927,354		20,619,033
Gross profit	381,854		433,576		1,157,462		1,202,041
Selling, general and administrative expenses	243,910		215,070		673,894		609,742
Intangible amortization	13,932		16,571		41,774		56,000
Other charges, net			13,234				6,267
Interest and other expense, net	7,775		10,848		31,418		68,182
Income before income taxes	116,237		177,853		410,376		461,850
Provision for (benefit from) income taxes	14,060		(20,437)		46,344		966
Net income	$ 102,177		$ 198,290		$ 364,032		$ 460,884
Earnings per share:
Basic	$ 0.14		$ 0.26		$ 0.50		$ 0.59
Diluted	$ 0.14		$ 0.26		$ 0.49		$ 0.58
Weighted-average shares used in computing per share amounts:
Basic	710,324		762,387		726,432		783,128
Diluted	720,894	[1]	776,595	[1]	737,255	[1]	794,961	[1]

[1] On August 2, 2010 the Company paid approximately $240.0 million to redeem its 1% Convertible Subordinated Notes upon maturity. The notes carried conversion provisions to issue shares to settle any conversion spread (excess of the conversion value over the conversion price) in stock. The conversion price was $15.525 per share (subject to certain adjustments). On the maturity date, the Company's stock price was less than the conversion spread, and therefore no shares were issued. During the nine-month period ended December 31, 2010, the conversion obligation was less than the principal portion of these notes and accordingly, no additional shares were included as ordinary share equivalents.