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Fair Value Measurements (Details 3) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Change in fair value of assets and liabilities measured on recurring basis, utilized Level 3 inputs |  |  |  |
Transfer of assets from Level 1 to Level 2 | $ 0.0 |  | $ 0.0 |
Transfer of assets from Level 2 to Level 1 | 0.0 |  | 0.0 |
Transfer of liabilities from Level 1 to Level 2 | 0.0 |  | 0.0 |
Transfer of liabilities from Level 2 to Level 1 | 0.0 |  | 0.0 |
Commodity contracts | Revenue |  |  |  |
Change in fair value of assets and liabilities measured on recurring basis, utilized Level 3 inputs |  |  |  |
Beginning of Period | 0.5 | $ 5.8 | 4.2 |
Total Gains (Losses) Included in Earnings | (0.1) | 4.1 | 0.7 | $ 9.9
Total Gains (Losses) Included in Earnings |  | (0.1) |  | (0.1)
Settlements | 0.1 | 6.6 | 4.6 | 6.6
Transfers into Level 3 | 1.0 |  | 1.0 |
End of Period | 1.3 | 3.3 | 1.3 | 3.3
End of Period |  | 0.1 |  | 0.1
Change in Unrealized Gains Relating to Assets (Liabilities) that are Held at end of Period | 1.0 | $ 2.0 | 1.4 | $ 3.3
Commodity contracts | Cost of revenue. |  |  |  |
Change in fair value of assets and liabilities measured on recurring basis, utilized Level 3 inputs |  |  |  |
Beginning of Period | 0.4 |  | 1.3 |
Total Gains (Losses) Included in Earnings | 0.4 |  | 0.8 |
Settlements |  |  | 0.5 |
Transfers into Level 3 | (0.1) |  | (0.1) |
End of Period | 0.1 |  | 0.1 |
Change in Unrealized Gains Relating to Assets (Liabilities) that are Held at end of Period | $ 0.5 |  | $ 0.9 |

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- Definition Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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