v2.4.0.8
Supplemental Financial Information (Accumulated Other Comprehensive Income) (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Supplemental Financial Information [Abstract]    
Derivative Instruments $ 28.6 $ 20.6
Other (1.9) (2.4)
Accumulated other comprehensive income $ 26.7 $ 18.2