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Investments - Investments in Equity Securities (Details) $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($)
Equity Securities
Beginning balance	$ 77.8
New investments	3.4
Decrease in fair value of investments in equity securities	(12.2)
Foreign currency translation adjustments and other	(2.8)
Ending balance	66.2
Investment in Equity Securities Level 1
Equity Securities
Beginning balance	31.3
New investments	0.0
Decrease in fair value of investments in equity securities	(11.9)
Foreign currency translation adjustments and other	(2.4)
Ending balance	17.0
Investment in Equity Securities, Level 2
Equity Securities
Beginning balance	6.2
New investments	0.0
Decrease in fair value of investments in equity securities	(0.3)
Foreign currency translation adjustments and other	0.0
Ending balance	5.9
Investments in Equity Securities, All Others
Equity Securities
Beginning balance	40.3
New investments	3.4
Decrease in fair value of investments in equity securities	0.0
Foreign currency translation adjustments and other	(0.4)
Ending balance	$ 43.3

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 45
-Paragraph 1A
-URI https://asc.fasb.org/extlink&oid=123594786&loc=SL75136599-209740

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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Amount of increase (decrease) of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
-SubTopic 10
-Section 45
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-URI https://asc.fasb.org/extlink&oid=123583714&loc=SL75117360-209713

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-Name Accounting Standards Codification
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