Annual report pursuant to Section 13 and 15(d)

Hedging Activities (Narrative) (Details)

Hedging Activities (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
General Discussion of Derivative Instruments and Hedging Activities [Abstract]    
Number of financial institutions 4 4
Gain on fair value hedge ineffectiveness, net $ (18.2) $ (0.1)
Gain on fair value hedge ineffectiveness (9.1)  
Loss related to amortization of OCI from hedging activity $ (9.1)  
Production delivered under fixed price swaps, percentage 48.00%