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Debt - Fair Value of Long-Term Debt (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Carrying value $ 6,904.5 $ 3,954.4
Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value $ 6,996.0 $ 4,077.9