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10. Other Income and Expenses | 12 Months Ended
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Dec. 31, 2018
Other Income and Expenses [Abstract] |
Other Income and Other Expense Disclosure | 10. OTHER INCOME AND 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 | )
Prior year amounts have been adjusted (see Note 1 to the consolidated financial statements in regard to ASU 2017-07) for pension and other postretirement benefits.

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- Definition The entire disclosure for other income or other expense items (both operating and nonoperating). Sources of nonoperating income or nonoperating expense that may be disclosed, include amounts earned from dividends, interest on securities, profits (losses) on securities, net and miscellaneous other income or income deductions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -URI http://asc.fasb.org/topic&trid=2122503 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 610 -URI http://asc.fasb.org/topic&trid=49130413 + Details
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