Summary of Accounting Policies (Narrative 1) (Details) (USD $)	12 Months Ended
	Mar. 31, 2011	Mar. 31, 2010	Mar. 31, 2009	Dec. 31, 2008
Net sales, percentage	10.00%	10.00%	10.00%
Charges incurred due to suits filed by customers for bankruptcy		$ (2,300,000)	$ 262,700,000
Provision for doubtful accounts	4,043,000	44,066,000	73,845,000
Maximum percentage of credit exposure	20.00%
Maximum amount of credit exposure	10,000,000
Depreciation expense associated with property and equipment	397,300,000	375,900,000	385,500,000
Implied fair value of goodwill				0
Impairment			5,949,977,000
Total intangible amortization expense	70,900,000	89,600,000	135,900,000
Minimum percentage of ownership of the company under equity method	20.00%
Equity investments in non-majority owned companies	34,000,000	27,300,000
Non-majority owned companies were accounted for using the equity method	1,700,000	1,900,000
Gain on sale of equity investment	18,600,000
Impairment charge to write-down equity investment and notes receivable		199,400,000	74,100,000
Maximum [Member]
Minority interest for the ownership of the minority owners	100.00%
Percentage of accounts receivable		10.00%
One Customer [Member]
Net sales, percentage	11.00%
Number of customers accounting for net sales	1
Ten Largest Customers [Member]
Net sales, percentage	52.00%	47.00%	50.00%
Number of customers accounting for net sales	10	10	10
Cost of Sales [Member]
Inventory written-down of and associated contractual obligations			189,500,000
Selling, General and Administrative Expenses [Member]
Provision for doubtful accounts			73,300,000
Global and North American Asset-Backed Securitization Programs [Member]
Deferred purchase price receivable	460,000,000
Global Asset-Backed Securitization Program [Member]
Deferred purchase price receivable		$ 135,400,000
Customer-Related Intangibles [Member]
Intangibles amortized on accelerated method expected cash flows, in years	8
Weighted average remaining useful lives of intangible assets	2.0
Licenses and Other Intangibles [Member]
Intangibles amortized on accelerated method expected cash flows, in years	7
Weighted average remaining useful lives of intangible assets	3.5