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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