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LONG-TERM OBLIGATIONS (Tables) | 12 Months Ended
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Dec. 31, 2021
Debt Disclosure [Abstract] |
Schedule of Long-term Debt Instruments | Long-term debt is summarized as follows (in millions):
| December 31,
| 2021 |  | 2020
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 obligations | 3.5 |  |  | 4.4 |
Other | 0.1 |  |  | 0.1 |
Total debt | 674.1 |  |  | 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, 2021 |  | December 31, 2020
$400 Million Facility | $ | — |  |  |  |  |  |  | $ | — |  |  |  |  |
$300 Million Facility | 62.8 |  |  |  |  |  |  | 35.3 |  |  |  |  |
Bilateral Arrangements | 45.0 |  |  |  |  |  |  | 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 |
2023 | 4.0 |
2024 | 69.9 |
2025 | — |
2026 | — |
Thereafter | 600.0 |
Total Debt | 677.9 |
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):
2021 | Book Value |  | Quote |  | Fair Value
5% Notes | $ | 600.0 |  |  | 1.03000 |  |  | $ | 618.0 |
Original Term Loan (net of discount) | 77.8 |  |  | 0.99875 |  |  | 77.7 |
2020 | Book Value |  | Quote |  | Fair 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 |

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