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Other Commitments And Contingencies (Tables)
 12 Months Ended
Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]  
Contractual Obligation, Fiscal Year Maturity Contractual Obligations. We have certain contractual obligations requiring payments at specified periods. The obligations include long-term debt, lease obligations, energy commodity contracts and obligations for various services including pipeline capacity and outsourcing of IT services. The total contractual obligations in existence at December 31, 2023 and their maturities were:
(in millions)Total20242025202620272028After
Long-term debt (1)
$10,955.0 $— $1,260.0 $— $1,090.0 $1,055.0 $7,550.0 
Interest payments on long-term debt6,017.8 431.1 431.1 418.5 399.1 349.0 3,989.0 
Finance leases(2)
321.8 34.8 30.7 25.7 20.6 19.3 190.7 
Operating leases(3)
39.7 9.6 5.9 5.4 4.6 3.2 11.0 
Energy commodity contracts153.9 114.7 39.2 — — — — 
Service obligations:
Pipeline service obligations2,196.6 652.0 485.7 406.3 388.7 162.3 101.6 
IT service obligations161.8 83.6 57.2 16.7 4.3 — — 
Other liabilities(4)
98.3 62.8 5.8 5.2 5.2 5.2 14.1 
Total contractual obligations$19,944.9 $1,388.6 $2,315.6 $877.8 $1,912.5 $1,594.0 $11,856.4 
(1) Long-term debt balance excludes unamortized issuance costs and discounts of $81.1 million.
(2) Finance lease payments shown above are inclusive of interest totaling $116.4 million.
(3) Operating lease payments shown above are inclusive of interest totaling $5.6 million. Operating lease balances do not include obligations for possible fleet vehicle lease renewals beyond the initial lease term. While we have the ability to renew these leases beyond the initial term, we are not reasonably certain to do so as they are renewed month-to-month after the first year.
(4)Other liabilities shown above are primarily related to the Indiana Crossroads Solar and Dunns Bridge I Developer payments due in 2024 and ongoing maintenance service agreements for our renewable joint ventures.