The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value.

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The difference between the carrying value and the sale price of debt securities, not separately or otherwise categorized as trading, available-for-sale, or held-to-maturity. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale.

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- Definition

The difference between the carrying value and the sale price of equity securities, not separately or otherwise categorized as trading or available-for-sale. This element includes investments in which the entity holds a small ownership stake (generally, less than 20% of the shares outstanding) and cannot exert significant influence.

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Other Charges / Income, Net (Details) (USD $)	12 Months Ended
Other Charges / Income, Net (Details) (USD $)	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010	Aug. 02, 2010
Debt Instrument [Line Items]
Net gain (charges) recognized	$ 19,963,000	$ (6,267,000)	$ (206,895,000)
Debt instrument interest percentage				1.00%
Recognized loss connection with the sale of certain international entities	20,000,000	(11,700,000)
Gain on sale of equity investment		18,600,000
Impairment charges related to equity investments and notes receivable	17,000,000		199,400,000
6.25% Senior Subordinated Notes [Member]
Debt Instrument [Line Items]
Loss on early redemption of Senior Subordinated Notes		$ 13,200,000
Debt instrument interest percentage		6.25%