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Other Intangible Assets - Summary of Other Intangible Assets (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Gross cost at January 1			$ 294.8
Exchange effect			2.0
Gross cost at September 30	$ 296.8		296.8
Accumulated amortization at January 1			(181.3)
Amortization expense			(16.3)	$ (17.2)
Impairment	(0.0)	$ (0.0)	(19.8)	$ (0.0)
Exchange effect			(0.8)
Accumulated amortization at September 30	(218.2)		(218.2)
Net book amount at September 30	$ 78.6		$ 78.6		$ 113.5

X

- Definition

Amount of increase (decrease) to amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life for foreign currency translation adjustments.

+ References

No definition available.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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Amount of foreign currency translation gain (loss) which increases (decreases) assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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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.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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