Commitments and Contingencies (Environmental) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended	1 Months Ended	0 Months Ended
Dec. 31, 2012	Jan. 26, 2011 Limited Number Of Remedial Alternatives [Member]	Jul. 05, 2011 Off-Site [Member]
Site Contingency [Line Items]
Loss Contingency Accrual, Carrying Value, Payments	$ 1.75
Estimated cost, minimum		7.9
Estimated cost, maximum		10.5
Estimated cost			9.5
Accrual, Present Value	4.25
Loss Exposure in Excess of Accrual, Best Estimate	$ 3.4

The payments made in the period which reduced loss contingency liabilities.

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Present value of the accrual for environmental loss contingencies at an individual site as of the balance sheet date (if the accrual qualifies for discounting).

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Best estimate of the reasonably possible loss exposure in excess of the amount accrued for environmental loss contingencies at an individual site.

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Best estimate of the loss exposure for reasonably possible environmental contingencies at an individual site for which no accrual has been recorded.

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High-end of the range estimate of the loss exposure for reasonably possible environmental contingencies at an individual site for which no accrual has been recorded.

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