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Financing Arrangement (Convertible Note Hedge and Warrants Issuance) (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified |
1 Months Ended | |
|---|---|---|
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Jul. 31, 2011
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Jul. 14, 2011
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| Convertible Note Hedge [Member] | ||
| Financing Arrangement [Line Items] | ||
| Shares covered by warrants issuance | 19.9 | |
| Amount paid for Convertible Note Hedge | $ 107 | |
| Warrant [Member] | ||
| Financing Arrangement [Line Items] | ||
| Shares covered by warrants issuance | 19.9 | |
| Strike price of warrants | 41.14 | |
| Proceeds from Warrants transaction | $ 65 | |
| Convertible Debt | ||
| Financing Arrangement [Line Items] | ||
| Debt Instrument, Convertible, Conversion Price | 31.74 |