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LONG-TERM OBLIGATIONS (Tables)
12 Months Ended
Dec. 31, 2021
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments
Long-term debt is summarized as follows (in millions):
 December 31,
 20212020
5% Senior Notes due May 15, 2029, net of unamortized debt issuance costs of $6.9 at December 31, 2021
$593.1 $— 
5-5/8% Senior Notes due February 1, 2025, net of unamortized debt issuance costs of $6.0 at December 31, 2020
— 594.0 
Credit Agreement – term debt due January 31, 2024 (“Original Term Loan”, as defined below), net of unamortized debt issuance costs of $0.4 and $3.0 at December 31, 2021 and 2020, respectively
77.4 381.0 
Credit Agreement – term debt due January 31, 2024 (“2019 Term Loan”, as defined below), net of unamortized debt issuance costs of $1.6 at December 31, 2020
— 194.3 
Finance lease obligations3.5 4.4 
Other0.1 0.1 
Total debt674.1 1,173.8 
Less: Current portion of long-term debt(5.6)(7.6)
Long-term debt, less current portion$668.5 $1,166.2 
Schedule of Debt
Letters of credit outstanding (in millions):
December 31, 2021December 31, 2020
$400 Million Facility$— $— 
$300 Million Facility62.8 35.3 
Bilateral Arrangements45.0 47.2 
Total$107.8 $82.5 
Schedule of Maturities of Long-term Debt Amounts shown are exclusive of minimum lease payments for capital lease obligations (in millions):
2022$4.0 
20234.0 
202469.9 
2025— 
2026— 
Thereafter600.0 
Total Debt677.9 
Less: Unamortized debt issuance costs(7.3)
Net debt$670.6 
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments
The Company estimates the fair values of its debt set forth below as of December 31, 2021 and 2020, as follows (in millions, except for quotes):
2021Book ValueQuoteFair Value
5% Notes$600.0 1.03000 $618.0 
Original Term Loan (net of discount)77.8 0.99875 77.7 
2020Book ValueQuoteFair Value
5-5/8% Notes$600.0 1.02750 $616.5 
Original Term Loan (net of discount)384.0 0.98750 379.2 
2019 Term Loan (net of discount)195.9 0.99000 193.9