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Non-operating Income (Expense) (Tables) | 12 Months Ended
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Dec. 31, 2012
Nonoperating Income (Expense) [Abstract] |
Schedule of Other Nonoperating Income (Expense) [Table Text Block] |
| Year ended December 31,
Dollar amounts in millions | 2012 |  | 2011 |  | 2010
Interest expense | $ | (48.0 | ) |  | $ | (54.4 | ) |  | $ | (60.8 | )
Amortization of debt charges | (1.5 | ) |  | (2.6 | ) |  | (3.1 | )
Capitalized interest | 0.2 |  |  | 0.1 |  |  | — |
Interest expense, net of capitalized interest | (49.3 | ) |  | (56.9 | ) |  | (63.9 | )
Investment income | 13.0 |  |  | 13.3 |  |  | 18.0 |
Realized gains from the sales of investments | — |  |  | 15.2 |  |  | 19.0 |
SERP market adjustments | 1.8 |  |  | 0.2 |  |  | 1.4 |
Investment income | 14.8 |  |  | 28.7 |  |  | 38.4 |
Other than temporary impairment | — |  |  | (14.8 | ) |  | (17.0 | )
Foreign currency gains (losses) | (2.7 | ) |  | (1.0 | ) |  | 2.2 |
Gain on settlement of litigation related to ARS | 20.0 |  |  | — |  |  | — |
Early debt extinguishment | (52.2 | ) |  | — |  |  | — |
Other non-operating expense | (34.9 | ) |  | (1.0 | ) |  | 2.2 |
Total non-operating expense | $ | (69.4 | ) |  | $ | (44.0 | ) |  | $ | (40.3 | )

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- Definition Tabular disclosure of the components of non-operating income or non-operating expense that may include amounts earned from dividends, interest on securities, gains (losses) on securities sold, equity earnings of unconsolidated affiliates, net gain (loss) on sales of business, interest expense and other miscellaneous income or expense items. + References No definition available. + Details
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