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Organization and Summary of Significant Accounting Policies - Investments (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Significant Equity Method Investees    
Equity method investments $ 1,636.9 $ 1,688.1
PTL    
Significant Equity Method Investees    
Equity method investments $ 1,590.9 $ 1,643.1
Penske transportation solutions, ownership percentage 28.90%