v2.4.0.8
Debt (Revolving Credit Facility And Commercial Paper) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Outstanding commercial paper obligations $ 139.7 $ 95.0
Revolving Credit Facility [Member]
   
Revolving credit facility expiration date Dec. 01, 2018  
Line of Credit Facility, Current Borrowing Capacity 800.0  
Letter Of Credit Maximum Capacity Value 100.0  
Line of Credit Facility, Competitive Bid Loans, Max 500.0  
Outstanding commercial paper obligations $ 139.7 $ 95.0