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Fair Value Measurements (Schedule Of Financial Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Millions | Sep. 30, 2016 | Dec. 31, 2015
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Supplemental executive retirement plan assets | $ 28.3 | $ 33.1
Total financial assets | 28.3 | 33.1
Derivative Assets (Liabilities), at Fair Value, Net | (4.3) | (19.7)
Financial Liabilities Fair Value Disclosure | (4.3) | (19.7)
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Supplemental executive retirement plan assets | 28.3 | 33.1
Total financial assets | 28.3 | 33.1
Derivative Assets (Liabilities), at Fair Value, Net | 0.0 | 0.0
Financial Liabilities Fair Value Disclosure | 0.0 | 0.0
Significant Other Observable Inputs (Level 2) [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Supplemental executive retirement plan assets | 0.0 | 0.0
Total financial assets | 0.0 | 0.0
Derivative Assets (Liabilities), at Fair Value, Net | (4.3) | (19.7)
Financial Liabilities Fair Value Disclosure | (4.3) | (19.7)
Significant Unobservable Inputs (Level 3) [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Supplemental executive retirement plan assets | 0.0 | 0.0
Total financial assets | 0.0 | 0.0
Derivative Assets (Liabilities), at Fair Value, Net | 0.0 | 0.0
Financial Liabilities Fair Value Disclosure | $ 0.0 | $ 0.0

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- Definition Fair Value Measured On Recurring Basis Supplemental Executive Retirement Plan Assets + References No definition available. + Details
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- Definition Total Financial Assets + References No definition available. + Details
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- Definition Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities. + References No definition available. + Details
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