Contingencies and Off-Balance Sheet Commitments (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Environmental indemnification obligations
Aggregate amounts accrued for environmental liabilities	$ 2.7	$ 2.6
Legal Proceedings
Liability recorded for public liability and property damage matters	346.6	332.2
Pending Litigation \| Sobel Case
Legal Proceedings
Estimate of possible loss	$ 40.0

Total costs accrued as of the balance sheet date for environmental loss contingencies.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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