Trade Receivables Securitization (Details) (USD $)	1 Months Ended	12 Months Ended
	Sep. 29, 2009	Mar. 31, 2011	Mar. 31, 2010	Mar. 31, 2009
Percent of receivables sold to unaffiliated institutions		100.00%
Recognized servicing assets and liabilities		$ 0
Eligible trade receivable for the purpose of sale, percent	100.00%
Accounts receivable sold to commercial paper conduit			217,100,000
Company's accounts receivable sold to third-party		1,000,000,000	709,400,000
Cash proceeds from the sale of accounts receivable sale to third party			417,100,000
Proceeds from deferred purchase price receivable		2,800,000,000
Recognized loss on sale of the related receivables and recorded in interest and other expense, net		8,000,000	7,800,000	14,000,000
Cash flows from the transfer of receivables		2,400,000,000
Retained interest			135,400,000
Proceeds from collections reinvested in revolving-period transfers		600,000,000
Represented collections on the retained interests			2,200,000,000	1,000,000,000
Non-cash revolving period transfers			2,300,000,000	3,000,000,000
Receivable sold but not yet collected from banking institutions		109,700,000	164,200,000
Receivable sold but not yet collected from third party banking institution		2,500,000,000	1,200,000,000	3,600,000,000
Transfer between levels in fair value hierarchy		0
Maximum [Member]
Service fee received, percent		1.00%
Minimum [Member]
Service fee received, percent		0.50%
North America A/R [Member]
Investment limit with financial institution		300,000,000
Proceeds from deferred purchase price receivable			1,000,000,000	600,000,000
Cash flows from the transfer of receivables			2,800,000,000	3,700,000,000
Europe and Asia A/R [Member]
Investment limit with financial institution			500,000,000
Proceeds from deferred purchase price receivable		460,000,000
Cash proceeds from sale of accounts receivable		$ 545,000,000