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Revenue - Contract Balances (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Sep. 30, 2024
Revenue from Contract with Customer [Abstract]    
Contract assets $ 85.8 $ 118.0
Contract liabilities 491.4 560.9
Contract liabilities, current 400.0 $ 466.7
Revenue recognition during the period $ 294.2