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Interest Expense, Net (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Interest Expense [Abstract]      
Interest on long-term debt $ 404.1 $ 344.5 $ 336.4
Interest on short-term borrowings 108.9 22.7 0.6
Debt discount/cost amortization 13.5 11.7 11.0
Accounts receivable securitization fees 2.7 2.5 1.4
Allowance for borrowed funds used and interest capitalized during construction (25.3) (6.7) (4.6)
Debt-based post-in-service carrying charges (30.7) (21.1) (14.7)
Other 16.4 8.0 11.0
Total Interest Expense, net $ 489.6 $ 361.6 $ 341.1