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Derivative Financial Instruments and Related Hedging Programs, Realized and Unrealized Gains (Losses) Table (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Summary Of Realized And Unrealized Gains (Losses) |  |  |  |
Unrealized gains (losses) |  |  | $ (7.7) | $ 3.6
Not Designated as Hedging Instrument |  |  |  |
Summary Of Realized And Unrealized Gains (Losses) |  |  |  |
Unrealized gains (losses) | $ (1.7) | $ (1.3) | (7.7) | 3.6
Operational Risk Hedges | Not Designated as Hedging Instrument |  |  |  |
Summary Of Realized And Unrealized Gains (Losses) |  |  |  |
Realized (losses) gains | (10.5) | 3.1 | (24.0) | 6.4
Unrealized gains (losses) | (1.7) | (3.5) | (7.7) | 0.0
Foreign Currency Member | Operational Risk Hedges | Designated as Hedging Instrument [Member] |  |  |  |
Summary Of Realized And Unrealized Gains (Losses) |  |  |  |
Unrealized gains (losses) | 0.0 | 0.0 | (0.2) | 0.0
Foreign Currency Member | Operational Risk Hedges | Not Designated as Hedging Instrument |  |  |  |
Summary Of Realized And Unrealized Gains (Losses) |  |  |  |
Unrealized gains (losses) | 0.0 | 0.1 | 0.0 | 0.0
Aluminum | Operational Risk Hedges | Not Designated as Hedging Instrument |  |  |  |
Summary Of Realized And Unrealized Gains (Losses) |  |  |  |
Realized (losses) gains | (9.0) | 3.1 | (18.8) | 5.2
Unrealized gains (losses) | (0.3) | (1.0) | (8.8) | 1.3
Natural Gas | Operational Risk Hedges | Not Designated as Hedging Instrument |  |  |  |
Summary Of Realized And Unrealized Gains (Losses) |  |  |  |
Realized (losses) gains | (1.2) | (0.1) | (3.8) | 1.1
Unrealized gains (losses) | (1.0) | (1.6) | (0.2) | (1.0)
Electricity | Operational Risk Hedges | Not Designated as Hedging Instrument |  |  |  |
Summary Of Realized And Unrealized Gains (Losses) |  |  |  |
Realized (losses) gains | (0.3) | 0.1 | (1.4) | 0.1
Unrealized gains (losses) | (0.4) | (1.0) | 1.3 | (0.3)
Hedges Relating To Notes Member | Call Options | Not Designated as Hedging Instrument |  |  |  |
Summary Of Realized And Unrealized Gains (Losses) |  |  |  |
Unrealized gains (losses) | 0.0 | 12.9 | 10.2 | 19.8
Hedges Relating To Notes Member | Bifurcated Conversion Feature | Not Designated as Hedging Instrument |  |  |  |
Summary Of Realized And Unrealized Gains (Losses) |  |  |  |
Unrealized gains (losses) | $ 0.0 | $ (10.7) | $ (10.2) | $ (16.2)

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 + Details
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