Debt (Tables)

12 Months Ended

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