Derivative Financial Instruments (Fair Value Of Derivative Assets And Its Maximum Credit Risk Exposure) (Details) $ in Millions	Sep. 30, 2015 USD ($)
Derivative [Line Items]
Derivative Assets at Fair Value	$ 4.7
Maximum Credit Risk	17.9
Merrill Lynch International [Member]
Derivative [Line Items]
Derivative Assets at Fair Value	4.3
Maximum Credit Risk	16.4
Goldman Sachs [Member]
Derivative [Line Items]
Derivative Assets at Fair Value	0.4
Maximum Credit Risk	$ 1.5

Fair value, after the 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 not subject to a master netting arrangement and not elected to be offset.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Name:	us-gaap_DerivativeAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant