Subsequent Events	6 Months Ended
Jun. 30, 2013
Subsequent Events
Subsequent Events	19. Subsequent Events Debt Activity. As of July 31, 2013, we received notices of conversion from holders of $219 million of our 3.00% convertible senior unsecured notes due 2029, which are expected to be settled by August 26, 2013. Holders' right to convert extends through the end of business on September 30, 2013. In general, upon conversion the holder will receive cash up to the principal amount of the converted notes and common stock for the conversion value in excess of such principal amount.

- Definition

Tabular disclosure of significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, losses resulting from fire or flood, losses on receivables, significant realized and unrealized gains and losses that result from changes in quoted market prices of securities, declines in market prices of inventory, changes in authorized or issued debt (SEC), significant foreign exchange rate changes, substantial loans to insiders or affiliates, significant long-term investments, and substantial dividends not in the ordinary course of business.

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