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Accumulated Comprehensive Loss (Tables) | 12 Months Ended
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Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items] |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | Other comprehensive income activity, net of tax, is provided in the following table for the years ended December 31, 2018, 2017 and 2016.
|  |  | Pension adjustments |  |  |  |  |  |
Dollar amounts in millions | Foreign currency translation adjustments |  | Actuarial losses |  | Prior service costs |  | Unrealized gain (loss) on investments |  | Other |  | Total
Balance at January 1, 2016 | $ | (55.1 | ) |  | $ | (87.8 | ) |  | $ | (5.5 | ) |  | $ | 3.3 |  |  | $ | (1.0 | ) |  | $ | (146.1 | )
Other comprehensive income (loss) before reclassifications | 8.8 |  |  | (5.3 | ) |  | — |  |  | (1.0 | ) |  | 0.4 |  |  | 2.9 |
Income taxes | — |  |  | 1.9 |  |  | — |  |  | 0.4 |  |  | (0.1 | ) |  | 2.2 |
Net other comprehensive income (loss) before reclassifications | 8.8 |  |  | (3.4 | ) |  | — |  |  | (0.6 | ) |  | 0.3 |  |  | 5.1 |
Amounts reclassified from accumulated comprehensive income (loss) | — |  |  | 5.5 |  |  | 0.5 |  |  | — |  |  | — |  |  | 6.0 |
Income taxes | — |  |  | (2.0 | ) |  | (0.2 | ) |  | — |  |  | — |  |  | (2.2 | )
Net amounts reclassified from cumulative other comprehensive income (loss) | — |  |  | 3.5 |  |  | 0.3 |  |  | — |  |  | — |  |  | 3.8 |
Total other comprehensive income (loss) | 8.8 |  |  | 0.1 |  |  | 0.3 |  |  | (0.6 | ) |  | 0.3 |  |  | 8.9 |
Balance at December 31, 2016 | (46.3 | ) |  | (87.7 | ) |  | (5.2 | ) |  | 2.7 |  |  | (0.7 | ) |  | (137.2 | )
Other comprehensive income (loss) before reclassifications | 6.6 |  |  | 3.2 |  |  | — |  |  | 1.3 |  |  | (0.9 | ) |  | 10.2 |
Income taxes | — |  |  | (1.1 | ) |  | — |  |  | (0.5 | ) |  | 0.2 |  |  | (1.4 | )
Net other comprehensive income (loss) before reclassifications | 6.6 |  |  | 2.1 |  |  | — |  |  | 0.8 |  |  | (0.7 | ) |  | 8.8 |
Amounts reclassified from accumulated comprehensive income (loss) | — |  |  | 9.3 |  |  | 0.5 |  |  | — |  |  | (0.1 | ) |  | 9.7 |
Income taxes | — |  |  | (3.2 | ) |  | (0.2 | ) |  | — |  |  | — |  |  | (3.4 | )
Net amounts reclassified from cumulative other comprehensive income (loss) | — |  |  | 6.1 |  |  | 0.3 |  |  | — |  |  | (0.1 | ) |  | 6.3 |
Total other comprehensive income (loss) | 6.6 |  |  | 8.2 |  |  | 0.3 |  |  | 0.8 |  |  | (0.8 | ) |  | 15.1 |
Balance at December 31, 2017 | (39.7 | ) |  | (79.5 | ) |  | (4.9 | ) |  | 3.5 |  |  | (1.5 | ) |  | (122.1 | )
Effect of adoption of ASU 2018-02 | — |  |  | (17.4 | ) |  | — |  |  | 0.7 |  |  | — |  |  | (16.7 | )
Other comprehensive income (loss) before reclassifications | (17.3 | ) |  | 4.1 |  |  | — |  |  | 0.1 |  |  | 0.7 |  |  | (12.4 | )
Income taxes | — |  |  | (1.1 | ) |  | — |  |  | — |  |  | (0.2 | ) |  | (1.3 | )
Net other comprehensive income (loss) before reclassifications | (17.3 | ) |  | 3.0 |  |  | — |  |  | 0.1 |  |  | 0.5 |  |  | (13.7 | )
Amounts reclassified from accumulated comprehensive income (loss) | — |  |  | 7.6 |  |  | 0.5 |  |  | — |  |  | — |  |  | 8.1 |
Income taxes | — |  |  | (1.9 | ) |  | (0.1 | ) |  | — |  |  | — |  |  | (2.0 | )
Net amounts reclassified from cumulative other comprehensive income (loss) | — |  |  | 5.7 |  |  | 0.4 |  |  | — |  |  | — |  |  | 6.1 |
Total other comprehensive income (loss) | (17.3 | ) |  | 8.7 |  |  | 0.4 |  |  | 0.1 |  |  | 0.5 |  |  | (7.6 | )
Balance at December 31, 2018 | $ | (57.0 | ) |  | $ | (88.2 | ) |  | $ | (4.5 | ) |  | $ | 4.3 |  |  | $ | (1.0 | ) |  | $ | (146.4 | )

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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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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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