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Goodwill And Intangible Assets (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2014
Dec. 31, 2013
Sep. 30, 2014
Franchise Rights [Member]
Sep. 30, 2013
Franchise Rights [Member]
Sep. 30, 2014
Franchise Rights [Member]
Sep. 30, 2013
Franchise Rights [Member]
Sep. 30, 2014
Goodwill [Member]
Sep. 30, 2013
Goodwill [Member]
Indefinite-lived Intangible Assets [Line Items]                
Goodwill $ 1,265,300,000 $ 1,259,600,000            
Franchise rights - indefinite-lived 332,300,000 329,300,000            
Other intangibles 12,600,000 11,100,000            
Intangible assets gross (excluding goodwill) 344,900,000 340,400,000            
Less: accumulated amortization (5,800,000) (5,300,000)            
Other intangible assets, net 339,100,000 335,100,000            
Date of annual goodwill and indefinite lived intangible assets impairment test         April 30 April 30 April 30 April 30
Franchise rights impairment     $ 0 $ 0 $ 0 $ 0