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v3.21.1

Debt (Parenthetical) (Details) | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020 | Feb. 25, 2021 | Feb. 24, 2021 | Mar. 31, 2020
6.50% Exchangeable Senior Notes due 2026 |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |
Stated interest rate | 6.50% |  |  |  |
6.00% Senior Notes due 2026 |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |
Stated interest rate | 6.00% | 6.00% |  |  |
5.875% Senior Notes due 2024 |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |
Stated interest rate | 5.875% | 5.875% |  |  |
5.125% Senior Notes due 2023 |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |
Stated interest rate | 5.125% | 5.125% |  |  |
5.875% Senior Notes due 2022 |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |
Stated interest rate | 5.875% | 5.875% |  |  |
Convertible Debt | 6.50% Exchangeable Senior Notes due 2026 |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |
Stated interest rate | 6.50% | 6.50% | 6.50% | 6.50% |
Debt instrument maturity year | 2026 | 2026 |  |  |
Senior Notes | 6.00% Senior Notes due 2026 |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |
Stated interest rate | 6.00% | 6.00% |  |  |
Debt instrument maturity year | 2026 | 2026 |  |  |
Senior Notes | 5.875% Senior Notes due 2024 |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |
Stated interest rate | 5.875% | 5.875% |  |  |
Debt instrument maturity year | 2024 | 2024 |  |  |
Senior Notes | 5.125% Senior Notes due 2023 |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |
Stated interest rate | 5.125% | 5.125% |  |  | 5.125%
Debt instrument maturity year | 2023 | 2023 |  |  |
Senior Notes | 5.875% Senior Notes due 2022 |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |
Stated interest rate | 5.875% | 5.875% |  |  |
Debt instrument maturity year | 2022 | 2022 |  |  |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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