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Legal and Environmental Matters Legal and Environmental Matters (Tables) | 9 Months Ended
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Sep. 30, 2018
Site Contingency [Line Items] |
Schedule of Environmental Loss Contingencies by Site [Table Text Block] | The activity in our reserve for estimated environmental loss contingency reserves for the quarter and nine months ended September 30, 2018 and 2017 is summarized in the following table.
| Quarter Ended |  | Nine Months Ended
| September 30, |  | September 30,
Dollar amounts in millions | 2018 |  | 2017 |  | 2018 |  | 2017
Beginning balance | $ | 12.5 |  |  | $ | 15.7 |  |  | $ | 15.0 |  |  | $ | 15.9 |
Adjusted to expense | (0.8 | ) |  | 0.8 |  |  | (1.6 | ) |  | 0.9 |
Payments made | (0.3 | ) |  | (1.0 | ) |  | (2.0 | ) |  | (1.3 | )
Ending balance | $ | 11.4 |  |  | $ | 15.5 |  |  | $ | 11.4 |  |  | $ | 15.5 |

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- Definition Tabular disclosure of environmental loss contingencies by individual site. Does not include loss contingencies that are not environmental in nature. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.Y.Q2) -URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 10 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13237-110859 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13283-110859 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13296-110859 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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