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Contingencies Enviromental liabilities rollforward (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Beginning Balance |  | $ 21.2 |  |
Adjusted to expense (income) during the year | 10.7 | 5.0 | 11.5 | 2.5
Ending Balance |  | 14.8 | 21.2 |
Reserve for Environmental Costs [Member] |  |  |  |
Beginning Balance |  | 15.0 | 14.3 | 14.7
Adjusted to expense (income) during the year |  | 0.7 | 1.5 | 0.3
Payments made |  | (1.6) | (0.8) | (0.7)
Ending Balance |  | 14.1 | 15.0 | 14.3
Formal cost share [Member] |  |  |  |
Other Unrecorded Amounts |  | 2.2 |  |
Indemnification Agreement [Member] |  |  |  |
Other Unrecorded Amounts |  | 2.7 |  |
Other Reserves [Member] |  |  |  |
Other Unrecorded Amounts |  | $ 0.2 |  |

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- Definition The carrying amount as of the balance sheet date of the combined total of loss contingency liabilities. + 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-Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9, 10, 11, 12 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14326-108349 + Details
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- Definition The payments made in the period which reduced loss contingency liabilities. + 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-Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9, 10, 11, 12 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14326-108349 + Details
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- Definition The increase (decrease) in the period in loss contingency liabilities. + 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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14326-108349 + Details
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- Definition Other unrecorded indebtedness which have not been separately stated. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Rule 15c3 -Number 240 -Section 3 -Subparagraph i -Article 15c3 + Details
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