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Fair Value Measurements (Details 3) (Commodity contracts, USD $)
In Millions, unless otherwise specified |
3 Months Ended |
|---|---|
|
Mar. 31, 2015
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Revenue
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| Change in fair value of assets and liabilities measured on recurring basis, utilized Level 3 inputs | |
| Beginning of Period | $ 4.2 |
| Total Gains (Losses) Included in Earnings | 0.8 |
| Settlements | 3.7 |
| End of Period | 1.3 |
| Change in Unrealized Gains Relating to Assets (Liabilities) that are Held at end of Period | (0.4) |
|
Cost of revenue.
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|
| Change in fair value of assets and liabilities measured on recurring basis, utilized Level 3 inputs | |
| Beginning of Period | 1.3 |
| Total Gains (Losses) Included in Earnings | 0.5 |
| Settlements | 0.5 |
| End of Period | 0.3 |
| Change in Unrealized Gains Relating to Assets (Liabilities) that are Held at end of Period | $ 0.8 |