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v3.20.4

Financial Instruments and Risk Concentration (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 | Oct. 31, 2020 | Jan. 31, 2017
Customer Concentration Risk | Accounts Receivable | Saudi Arabia |  |  |
Percentage | 25.00% |  |
Customer Concentration Risk | Accounts Receivable | Mexico |  |  |
Percentage | 21.00% |  |
5.00% senior notes due September 2020 |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 5.00% |  |
4.625% senior notes due September 2021 |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.625% |  |
5.50% senior notes due January 2023 |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 5.50% |  |
5.10% senior notes due September 2023 |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 5.10% |  |
5.75% senior notes due February 2025 |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 5.75% |  |
0.75% senior exchangeable notes due January 2024 |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 0.75% |  | 0.75%
7.25% senior guaranteed notes due January 2026 |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 7.25% |  |
7.50% senior guaranteed notes due January 2028 |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 7.50% |  |
6.50% senior priority guaranteed notes due February 2025 |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 6.50% | 6.50% |
9.00% senior priority guaranteed notes due February 2025 |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 9.00% | 9.00% |

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