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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

X

- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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- Definition

The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

+ References

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- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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