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Receivables (Tables) | 12 Months Ended
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Dec. 31, 2011
Receivables [Abstract] |
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] | Receivables consist of the following:
| December 31,
Dollar amounts in millions | 2011 |  | 2010
Trade receivables | $ | 55.9 |  |  | $ | 56.2 |
Interest receivables | 1.2 |  |  | 1.1 |
Other receivables | 9.1 |  |  | 10.8 |
Allowance for doubtful accounts | (1.1 | ) |  | (1.3 | )
| $ | 65.1 |  |  | $ | 66.8 |

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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3, 4 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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