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Income Taxes - Other Tax Disclosure Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits	$ 41.1	$ 38.7	$ 47.7	$ 28.2
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	4.4	1.0	3.1
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	11.5	$ 6.9	$ 7.5	$ 2.5
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 49.4

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Amount of unrecognized tax benefits.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 10B
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-Section 50
-Paragraph 15A
-Subparagraph (a)
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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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