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Long-Term Debt and Finance Lease Obligations - 2025 Notes and 2028 Notes, Redemption Price (Details) - Senior Notes | 12 Months Ended
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Dec. 31, 2020
2025 Notes | 12-Month Period Beginning February 15, 2022/2023 |
Debt Instrument, Redemption [Line Items] |
Redemption prices as percentage of principal amount | 102.625%
2025 Notes | 12-Month Period Beginning February 15, 2023/2024 |
Debt Instrument, Redemption [Line Items] |
Redemption prices as percentage of principal amount | 101.313%
2025 Notes | 12-Month Period Beginning February 15, 2024 and thereafter/2025 |
Debt Instrument, Redemption [Line Items] |
Redemption prices as percentage of principal amount | 100.00%
2028 Notes | 12-Month Period Beginning February 15, 2022/2023 |
Debt Instrument, Redemption [Line Items] |
Redemption prices as percentage of principal amount | 102.875%
2028 Notes | 12-Month Period Beginning February 15, 2023/2024 |
Debt Instrument, Redemption [Line Items] |
Redemption prices as percentage of principal amount | 101.917%
2028 Notes | 12-Month Period Beginning February 15, 2024 and thereafter/2025 |
Debt Instrument, Redemption [Line Items] |
Redemption prices as percentage of principal amount | 100.958%
2028 Notes | 12-Month Period Beginning February 15, 2026 and thereafter |
Debt Instrument, Redemption [Line Items] |
Redemption prices as percentage of principal amount | 100.00%

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- Definition Percentage price of original principal amount of debt at which debt can be redeemed by the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph e -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
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