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Commitments and Contingencies Commitments and Contingencies (Details) (Narrative) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Loss Contingencies [Line Items] | |||
| Accrual for Environmental Loss Contingencies | $ 38.5 | $ 48.3 | |
| Estimated Environmental Liabilities Over A Period | 10 years | ||
| Environmental Remediation Expense | (5.2) | 12.0 | 23.1 |
| Recorded Third-Party Environmental Recoveries Receivable | 4.8 | 7.9 | |
| Recorded Third-Party Environmental Recoveries, Amount | 4.2 | 1.2 | 0.5 |
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Texas Commission On Environmental Quality Fees [Member]
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| Loss Contingencies [Line Items] | |||
| Loss Contingency, Estimate of Possible Loss | 10.9 | ||
| Loss Contingency, Loss in Period | (10.6) | ||
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Accounts Receivable [Member]
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| Loss Contingencies [Line Items] | |||
| Recorded Third-Party Environmental Recoveries Receivable | 2.1 | 2.8 | |
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Other Noncurrent Assets [Member]
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| Loss Contingencies [Line Items] | |||
| Recorded Third-Party Environmental Recoveries Receivable | $ 2.7 | $ 5.1 | |