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Debt (Tables) | 12 Months Ended
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Dec. 31, 2020
Debt Disclosure [Abstract] |
Schedule of Long-term Debt | Long-term debt at December 31, 2020 and December 31, 2019 consisted of the following:
(in millions) | 2020 |  | 2019
Senior Notes, 6.375%, due 2049, net of debt issuances costs of $7.5 and $7.8 | $ | 222.5 |  |  | $ | 222.2 |
Senior Notes, 6.500% due 2048, net of debt issuance costs of $8.0 and $8.2 | 177.0 |  |  | 176.8 |
Notes, 7.125% due 2027, net of discount of $0.2 and $0.3 and debt issuance costs of $0.3 and $0.4 | 162.7 |  |  | 162.5 |
Term loan, floating rate due 2023, net of debt issuance costs of $0.6 and $1.3 (A) (C) | 150.7 |  |  | 305.0 |
Senior Notes, 6.625%, due 2049, net of debt issuances costs of $4.2 and $4.4 | 120.8 |  |  | 120.6 |
Debentures, 7.375% due 2023, net of discount of $0.1 and $0.1 and debt issuance costs of $0.1 and $0.2 (B) | 104.6 |  |  | 105.2 |
Loan with Fond du Lac County Economic Development Corporation, 2.0% due 2021, net of discount of $0.8 and $1.6 and debt issuance costs of $0.0 and $0.0 | 6.9 |  |  | 11.1 |
Notes, various up to 5.9% payable through 2028 | 6.2 |  |  | 5.9 |
Total long-term debt | 951.4 |  |  | 1,109.3 |
Current maturities of long-term debt | (43.1) |  |  | (41.3) |
Long-term debt, net of current maturities | $ | 908.3 |  |  | $ | 1,068.0 |
(A) Beginning in December 2018, scheduled repayment of the 5-year term loan occurs each March, June, September and December equal to 2.50% of the aggregate principal amount of $350.0 million. The remaining principal amount is due August 2023. (B) Included in Debentures, 7.375% percent due 2023 at December 31, 2020 and December 31, 2019, are the aggregate fair values related to the fixed-to-floating interest rate swaps as discussed in Note 14 – Financial Instruments. (C) As of December 31, 2020 and December 31, 2019, the interest rate was 1.74% and 3.50%, respectively.
Schedule of Maturities of Long-term Debt, Net | Scheduled maturities, net:
(in millions) |
2021 | $ | 43.1 |
2022 | 36.4 |
2023 | 186.3 |
2024 | 0.5 |
2025 | 2.0 |
Thereafter | 683.1 |
Total long-term debt including current maturities | $ | 951.4 |

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