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Investments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Debt and Equity Securities, FV-NI
Balance at December 31, 2020	$ 73.6
New investments	40.0	$ 0.0
(Decrease) increase in fair value of investments in equity securities	3.3
Foreign currency translation adjustments	(2.3)
Balance at March 31, 2021	114.6
Subtotal
Debt and Equity Securities, FV-NI
Balance at December 31, 2020	57.9
New investments	0.0
(Decrease) increase in fair value of investments in equity securities	3.3
Foreign currency translation adjustments	(2.4)
Balance at March 31, 2021	58.8
Investments in Equity Securities Level 1
Debt and Equity Securities, FV-NI
Balance at December 31, 2020	53.8
New investments	0.0
(Decrease) increase in fair value of investments in equity securities	(2.6)
Foreign currency translation adjustments	(2.4)
Balance at March 31, 2021	48.8
Investments in Equity Securities, Level 2
Debt and Equity Securities, FV-NI
Balance at December 31, 2020	4.1
New investments	0.0
(Decrease) increase in fair value of investments in equity securities	5.9
Foreign currency translation adjustments	0.0
Balance at March 31, 2021	10.0
Investments in Equity Securities, All Others
Debt and Equity Securities, FV-NI
Balance at December 31, 2020	15.7
New investments	40.0
(Decrease) increase in fair value of investments in equity securities	0.0
Foreign currency translation adjustments	0.1
Balance at March 31, 2021	$ 55.8

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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).

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