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Income Taxes - Rollforward Net operating losses (Details) - USD ($) $ in Millions	12 Months Ended		24 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020
Income Taxes
Balance at January 1,	$ 1.8	$ 1.9	$ 1.9
NOL generated (utilized)	1.1	(0.1)
Balance at December 31,	$ 2.9	$ 1.8	2.9
Global Intangible Low-Taxed Income (in percent)	10.50%
Penalties and interest related to unrecognized tax benefits			$ 0.0

X

- Definition

Amount of operating loss carryforwards generated or utilized.

+ References

No definition available.

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- Definition

Percentage of tax on Global Intangible Low-Taxed Income.

+ References

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- References

No definition available.

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X

- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319

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