Trade Receivables Securitization (Narrative) (Details) (USD $)	6 Months Ended
	Sep. 30, 2011	Oct. 01, 2010	Mar. 31, 2011	Mar. 31, 2010
Schedule of trade receivable securitization [Line Items]
Percent of receivables sold to unaffiliated institutions	100.00%
Company's accounts receivable sold to third-party	$ 1,700,000,000		$ 1,000,000,000
Cash proceeds from sale of accounts receivable	600,700,000		545,000,000
Deferred purchase price receivable	1,072,661,000	254,083,000	459,994,000	135,401,000
Cash flows from new transfers of receivables	200,000,000	300,000,000
Receivable sold but not yet collected from banking institutions	55,100,000		109,700,000
Accounts receivable sold to certain third party Banking Institutions	1,000,000,000	1,200,000,000
Cash proceeds from the sale of accounts receivable	2,400,000,000	800,000,000
North American Program [Member]
Schedule of trade receivable securitization [Line Items]
Investment limits with financial institution	300,000,000
Global Program [Member]
Schedule of trade receivable securitization [Line Items]
Investment limits with financial institution	500,000,000
Accounts receivable sold to commercial paper conduit				$ 217,100,000