Quarterly report pursuant to Section 13 or 15(d)

Fair Value Of Financial Instruments (Fair Value, Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation) (Details)

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Fair Value Of Financial Instruments (Fair Value, Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Fair Value Of Financial Instruments [Abstract]  
Beginning balance - January 1 $ (19.5)
Total losses  
Included in earnings (1.1)
Settlements 19.5
Ending balance - March 31 (1.1)
Total losses for the period included in earnings attributable to the change in unrealized losses on assets still held at the reporting date $ (1.1)