|
Fair Value Measurements Fair Value, Assets and Liabilities Not Measured at Fair Value (Details) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2012
|
|---|---|
| Schedule of Cost-method Investments [Line Items] | |
| Cost Method Investments, Fair Value Disclosure | $ 2.3 |
| Cost-method Investments, Aggregate Carrying Amount | $ 1.9 |