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Derivatives Assets and Liabilities (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Derivative [Line Items]
Derivative asset	$ 13.5	$ 8.2
Derivative liability	7.1	2.5
Commodity Contract [Member]
Derivative [Line Items]
Derivative asset	13.5	8.2
Derivative liability	6.6	2.2
Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivative asset	0.0	0.0
Derivative liability	$ 0.5	$ 0.3

X

- Definition

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

+ References

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- Definition

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

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