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Financial Instruments And Fair Value Measurements (Tables)
 6 Months Ended
Jun. 30, 2024
Fair Value Disclosures [Abstract]  
Gains (losses) recognized related to equity investments
Six Months Ended
June 30,
20242023
Net losses recognized during the period on equity securities$(1.8)$(1.3)
Less: Net gains (losses) recognized during the period on equity securities sold during the period
— — 
Unrealized losses recognized during the reporting period on equity securities still held at the reporting date$(1.8)$(1.3)
Summary Of Carrying Values And Fair Values Of Fixed Rate Debt A summary of the aggregate carrying values and fair values of our senior unsecured notes is as follows:
June 30,
2024		December 31,
2023
Carrying value$3,230.2 $3,228.1 
Fair value$2,979.1 $2,979.3