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Investments (Tables)
 12 Months Ended
Dec. 31, 2023
Investments, Debt and Equity Securities, Equity Method Investments and Joint Ventures [Abstract]  
Schedule of Equity Securities
The following table summarizes the measurement category, balance sheet location, and balances of our equity securities (in millions):
Year Ended
Measurement CategoryBalance Sheet LocationDecember 31, 2023December 31, 2022
Fair value methodPrepaid expenses and other current assets$0.1 $0.1 
Fair value method(1)
Other non-current assets$1.3 $1.7 
Equity methodOther non-current assets$60.1 $63.4 
(1) Measured at fair value using the Net Asset Value practical expedient.
Schedule of Equity Security Expense (Income)
The following table summarizes the expense (income) recognized in earnings of our equity securities (in millions):

Year Ended
Measurement CategoryIncome Statement LocationDecember 31, 2023December 31, 2022December 31, 2021
Fair value methodOther (income) expense, net$0.4 $0.4 $2.0 
Equity methodOther (income) expense, net$1.9 $1.5 $1.1