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Summary of Significant Accounting Policies (Gaming Taxes) (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Sep. 30, 2013
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Sep. 30, 2012
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Sep. 30, 2013
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Sep. 30, 2012
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| Accounting Policies [Abstract] | ||||
| Gaming taxes | $ 99.2 | $ 67.8 | $ 303.3 | $ 206.8 |