v2.4.0.8
Fair Value Measurements, Financial Instruments (Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Financial Instruments    
Preferred stock of subsidiary $ 30.4 $ 30.4
Carrying (Reported) Amount, Fair Value Disclosure [Member]
   
Financial Instruments    
Preferred stock of subsidiary 30.4 30.4
Long-term debt including current portion 4,659.7 4,772.9
Estimate of Fair Value, Fair Value Disclosure [Member]
   
Financial Instruments    
Preferred stock of subsidiary 26.3 26.0
Long-term debt including current portion $ 4,951.7 $ 5,447.3