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Joint Ventures (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) joint_venture	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Joint venture
Schedule of Equity Method Investments [Line Items]
Ownership of joint ventures (as a percent)	50.00%
Equity investment in joint ventures	$ 59.3	$ 52.4
China
Schedule of Equity Method Investments [Line Items]
Ownership of joint ventures (as a percent)	50.00%
China | Joint venture
Schedule of Equity Method Investments [Line Items]
Number of joint ventures | joint_venture	2
Ownership of joint ventures (as a percent)	50.00%
Other income, net	$ 2.0	$ 2.1	$ 2.2

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Number of Joint Ventures

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Ancillary revenue earned during the period from the consideration paid to the entity for the use of its rights and property by another party. Examples include licensing the use of copyrighted materials and leasing the extraction of natural resources.

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