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Financial Instruments And Fair Value Measurements (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Fair Value, Measurements, Nonrecurring [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Impairment of long-lived assets for sale |  |  | $ 6.0 | $ 0.2
Fair Value, Measurements, Nonrecurring [Member] | Continuing Operations [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Impairment of long-lived assets held and used | $ 1.8 | $ 2.3 | 1.8 | 2.3
Impairment of long-lived assets for sale | 4.9 | 0.0 | 5.8 | 0.2
Fair Value, Measurements, Nonrecurring [Member] | Discontinued Operations [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Impairment of long-lived assets for sale | 0.0 | $ 0.0 | 0.2 | $ 0.0
Reported Value Measurement [Member] | Continuing Operations [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Long-lived assets held for sale | 52.2 |  | 52.2 |
Reported Value Measurement [Member] | Discontinued Operations [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Long-lived assets held for sale | $ 21.5 |  | $ 21.5 |
Goodwill [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Date of Annual Goodwill and Indefinite Lived Intangible Assets Impairment Test |  |  | April 30 | April 30
Franchise Rights [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Date of Annual Goodwill and Indefinite Lived Intangible Assets Impairment Test |  |  | April 30 | April 30

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