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Reportable Segments - Earnings from Equity Method Investments Included in Non-Operating Income and Expense (Details)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2023
USD ($)
segment
Sep. 30, 2022
USD ($)
Segment Reporting Information [Line Items]        
Earnings from equity method investments $ 3.7 $ 3.5 $ 11.7 $ 9.7
Number of Corporate Units | segment     1  
International        
Segment Reporting Information [Line Items]        
Earnings from equity method investments 4.0 3.3 $ 10.9 8.7
U.S. Markets        
Segment Reporting Information [Line Items]        
Earnings from equity method investments $ (0.3) $ 0.2 $ 0.7 $ 1.0