Annual Discount Rate Used In Discounted Cash Flow Model

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The upper limit of range for the annual interest rate of the auction rate securities

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The lower limit of range for the annual interest rate of the auction rate securities

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The higher range of the days that Auction rate securities reset

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The lower range of the days that Auction rate securities reset

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Auction rate security year of maturity, higher range.

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Auction rate security year of maturity, lower range.

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Weighted average expected life of underlying student loans, maximum.

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Weighted average expected life of underlying student loans, minimum.

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- Definition

Fair value, as of the acquisition date, of potential payments under the contingent consideration arrangement including cash and shares.

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This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. Fair value of convertible debt at the balance sheet date.

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-Glossary Convertible Security

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Including the current and noncurrent portions, carrying value as of the balance sheet date of a written promise to pay a note, initially due after one year or beyond the operating cycle if longer, which can be exchanged for a specified amount of one or more securities (typically common stock), at the option of the issuer or the holder.

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Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

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The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount.

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Transfers into assets measured at fair value and categorized within Level 3 of the fair value hierarchy that have taken place during the period.

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- Definition

The discount rate used to estimate the fair value of servicing assets and servicing liabilities.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Debt securities that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) or for debt securities formerly categorized as available-for-sale or held-to-maturity which the entity held as of the date it opted to account for such securities at fair value. An enterprise may also categorize such a security as trading without the intent to sell it in the near term assuming the decision to categorize the security as trading occurred at acquisition.

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Fair Value Measurements (Narrative) (Details) (USD $)	9 Months Ended			3 Months Ended
Fair Value Measurements (Narrative) (Details) (USD $)	Sep. 30, 2011 years	Sep. 30, 2011 Convertible Notes [Member]	Dec. 31, 2010 Convertible Notes [Member]	Sep. 30, 2011 CGI Pharmaceuticals [Member]	Sep. 30, 2011 Contingent Consideration [Member]	Sep. 30, 2011 2021 Senior Unsecured Notes [Member]	Mar. 31, 2011 2021 Senior Unsecured Notes [Member]
Short-term Debt [Line Items]
Carrying value of the Convertible Notes		$ 2,900,000,000	$ 3,480,000,000
Carrying value of the 2021 notes						991,900,000
Fair value of convertible notes		3,530,000,000	3,970,000,000			1,070,000,000
Principal amount of 2021 Notes						1,000,000,000	1,000,000,000
Weighted-average expected life of underlying student loans minimum, years	3
Weighted-average expected life of underlying student loans maximum, years	7
Annual discount rate used in discounted cash flow model	2.38%
Auction rate reset, lower range, in days	7
Auction rate reset, upper range, in days	14
Auction rate securities year of maturity, lower range	2025
Auction rate securities year of maturity, higher range	2040
Auction rate securities annual interest rate, lower range	0.14%
Auction rate securities annual interest rate, higher range	0.90%
Bonds received from Greek government	63,500,000
Balance of transfers in to level 3	53,900,000
Present value discount rate				8.00%
Contingent consideration					$ 128,300,000