Debt	3 Months Ended
Mar. 31, 2012
Debt [Abstract]
Debt	Note 7: Debt At March 31, 2012, the principal amount of our convertible senior notes was $215 million. Our common stock price exceeded the $17.06 per share conversion threshold price set forth for these convertible notes for at least 20 trading days during the 30 consecutive trading days ended March 31, 2012. Accordingly, these notes are convertible at the holder’s option through June 30, 2012. We may deliver shares of common stock, cash or a combination of cash and shares of common stock in satisfaction of our obligations upon conversion of the convertible notes. Based on a March 31, 2012 stock price of $27.83, the “if converted value” exceeds the face amount of the remaining notes by $241 million; however, after giving effect to the exercise of the related outstanding call options and warrants, the incremental cash or share settlement in excess of the face amount would result in either a 7 million net share issuance or a cash payment of $198 million, or a combination of cash and stock, at our option.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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