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Basis Of Presentation Basis of Presentation (Narrative) (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Derivative Asset, Current	$ 274.1	$ 333.9
Derivative Liability, Current	$ 428.0	516.9
Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Derivative Asset, Current		(38.0)
Derivative Liability, Current		$ (38.0)

Fair value, after the 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, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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