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Related Party Transactions (Details) - Equity Method Investee - Related Party Transactions - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Related Party Transaction [Line Items]        
Revenues $ 25.7 $ 27.6 $ 55.3 $ 57.5
Costs of materials and other $ 12.4 $ 10.9 $ 37.4 $ 31.4