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Impairments (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Impairment charges on fixed and other assets | $ 0.0 | $ 5.5 | $ 0.9
Impairment of intangible assets |  | 16.2 |
Total impairment charges | 0.0 | 19.9 | 0.2
Impairment of Fixed and Other Assets |  |  |
Impairment charges on fixed and other assets | 0.0 | 5.1 | 0.5
Total impairment charges |  |  | 0.5
Cost of goods |  |  |
Total impairment charges |  | 1.4 | 0.3
Operating Expense |  |  |
Total impairment charges |  | 19.9 | 0.2
Audio |  |  |
Total impairment charges | $ 0.0 | $ 21.3 | $ 0.5

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