Our long-term debt as of December 31, 2024 and 2023 is as follows: | | | | | | | | | | | | | | | | | | | | | | Long-term debt type | Maturity as of December 31, 2024 | Weighted average interest rate (%) | | Outstanding balance as of December 31, (in millions) | | 2024 | | 2023 | | Senior notes: | | | | | | | | NiSource | August 2025 | 0.950 | % | | $ | 1,250.0 | | | $ | 1,250.0 | | | NiSource | May 2027 | 3.490 | % | | 1,000.0 | | | 1,000.0 | | | NiSource | December 2027 | 6.780 | % | | 3.0 | | | 3.0 | | NiSource | March 2028 | 5.250 | % | | 1,050.0 | | 1,050.0 | | | NiSource | July 2029 | 5.200 | % | | 600.0 | | | — | | | NiSource | September 2029 | 2.950 | % | | 750.0 | | | 750.0 | | | NiSource | May 2030 | 3.600 | % | | 1,000.0 | | | 1,000.0 | | | NiSource | February 2031 | 1.700 | % | | 750.0 | | | 750.0 | | NiSource | June 2033 | 5.400 | % | | 450.0 | | 450.0 | | | NiSource | April 2034 | 5.350 | % | | 650.0 | | | — | | | NiSource | December 2040 | 6.250 | % | | 152.6 | | | 152.6 | | | NiSource | June 2041 | 5.950 | % | | 347.4 | | | 347.4 | | | NiSource | February 2042 | 5.800 | % | | 250.0 | | | 250.0 | | | NiSource | February 2043 | 5.250 | % | | 500.0 | | | 500.0 | | | NiSource | February 2044 | 4.800 | % | | 750.0 | | | 750.0 | | | NiSource | February 2045 | 5.650 | % | | 500.0 | | | 500.0 | | | NiSource | May 2047 | 4.375 | % | | 1,000.0 | | | 1,000.0 | | | NiSource | March 2048 | 3.950 | % | | 750.0 | | | 750.0 | | | NiSource | June 2052 | 5.000 | % | | 350.0 | | | 350.0 | | | Total senior notes | | | | $ | 12,103.0 | | | $ | 10,853.0 | | Junior subordinated notes: | | | | | | | | NiSource | November 2054 | 6.950 | % | | 500.0 | | | — | | | NiSource | March 2055 | 6.375 | % | | 500.0 | | | — | | Total junior subordinated notes | | | | $ | 1,000.0 | | | $ | — | | | Medium term notes: | | | | | | | | NiSource | May 2027 | 7.990 | % | | $ | 29.0 | | | $ | 29.0 | | | NIPSCO | June 2027 to August 2027 | 7.644 | % | | 58.0 | | | 58.0 | | | Columbia of Massachusetts | December 2025 to February 2028 | 6.373 | % | | 15.0 | | | 15.0 | | | Total medium term notes | | | | $ | 102.0 | | | $ | 102.0 | | Finance leases: | | | | | | | | NiSource Corporate Services | January 2025 to September 2027 | 3.470 | % | | $ | 14.6 | | | $ | 30.5 | | | NIPSCO | December 2027 to November 2035 | 5.250 | % | | 124.3 | | | 61.2 | | | Columbia of Ohio | December 2025 to March 2044 | 6.150 | % | | 85.6 | | | 90.3 | | | Columbia of Virginia | July 2029 to November 2039 | 6.190 | % | | 15.2 | | | 16.1 | | | Columbia of Kentucky | May 2027 | 5.360 | % | | 0.1 | | | 0.2 | | | Columbia of Pennsylvania | July 2027 to May 2035 | 4.470 | % | | 6.4 | | | 7.1 | | | Total finance leases | | | | $ | 246.2 | | | $ | 205.4 | | Less: Unamortized issuance costs and discounts | | | | (95.5) | | | (81.1) | | Less: Current portion of long term debt | | | | (1,281.2) | | | (23.8) | | | Total Long-Term Debt | | | | $ | 12,074.5 | | | $ | 11,055.5 | |
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