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10. Other Income and Expenses (Tables) | 12 Months Ended
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Dec. 31, 2018
Other Income and Expenses [Abstract] |
Schedule of other income (expense), net | Other (income) expense, net includes the following components (in millions):
|  | Year Ended December 31,
|  | 2018 |  | 2017 |  | 2016
Interest and investment income |  | $ | (26.6 | ) |  | $ | (19.1 | ) |  | $ | (14.7 | )
Net realized gains on investments |  | (1.6 | ) |  | (0.1 | ) |  | (0.8 | )
Other-than-temporary impairment losses on investments |  | 0.8 |  |  | 7.0 |  |  | 0.6 |
Gain on sale of land |  | (4.1 | ) |  | — |  |  | — |
Gain on divestiture of product line |  | (5.1 | ) |  | — |  |  | — |
Other expense |  | — |  |  | 1.5 |  |  | 1.1 |
Other (income) expense, net |  | $ | (36.6 | ) |  | $ | (10.7 | ) |  | $ | (13.8 | )

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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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