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Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2013 LegalMatter | Dec. 31, 2012
Loss Contingencies [Line Items] |  |
Number Of Lawsuits | 2,000 |
Number Of Claims In Lawsuit | 2,200 |
Liability For claims and contingencies | $ 254.7 | $ 278.9
Liability reserve for insurance claims | 119.6 | 131.0
Environmental Reserve | 39.3 | 49.2
Outstanding Value Of Letters Of Credit | $ 484.0 | $ 493.2
Compliance Settlement Period | 3 years |

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- Definition The total amount of pending claims pertaining to a loss contingency accrual as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9, 10, 11, 12 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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