Investments - Investments in Equity Securities (Details) $ in Millions	9 Months Ended
Sep. 30, 2022 USD ($)
Equity Securities
Beginning balance	$ 77.8
New investments	4.4
Change in fair value of investments in equity securities	(10.9)
Foreign currency translation adjustments and other	(4.4)
Ending balance	66.9
Investment in Equity Securities Level 1
Equity Securities
Beginning balance	31.3
New investments	0.0
Change in fair value of investments in equity securities	(16.1)
Foreign currency translation adjustments and other	(3.4)
Ending balance	11.8
Investment in Equity Securities, Level 2
Equity Securities
Beginning balance	6.2
New investments	0.0
Change in fair value of investments in equity securities	5.2
Foreign currency translation adjustments and other	0.0
Ending balance	11.4
Investments in Equity Securities, All Others
Equity Securities
Beginning balance	40.3
New investments	4.4
Change in fair value of investments in equity securities	0.0
Foreign currency translation adjustments and other	(1.0)
Ending balance	$ 43.7

Equity Securities, FV-NI, Foreign Currency Translation Adjustments

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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).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-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

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(2))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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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).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
-SubTopic 10
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=123583714&loc=SL75117360-209713

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 19
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3444-108585

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