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Financial Instruments, Guarantees With Off-Balance-Sheet Risk and Other Guarantees (Details) - USD ($) |  | 1 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2022 | Jan. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Feb. 01, 2023 | Jan. 31, 2022 | Nov. 06, 2020 | Apr. 03, 2017
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |
Letters of credit outstanding, amount | $ 569,600,000 |  | $ 569,600,000 |  |  |  |  |  |
Asset retirement obligations | 750,000,000 |  | 750,000,000 | $ 719,800,000 | $ 728,200,000 |  |  |  |
Surety bonds and bank guarantees outstanding to secure reclamation obligations or activities | 1,250,100,000 |  | 1,250,100,000 | 1,294,700,000 |  |  |  |  |
Letters of credit outstanding for reclamation | 431,700,000 |  | 431,700,000 |  |  |  |  |  |
Interest expense |  |  | 140,300,000 | 183,400,000 | 139,800,000 |  |  |  |
Restricted cash included in “Restricted cash and collateral arrangements” | 110,300,000 |  | 110,300,000 |  |  |  |  |  |
Collateralized Agreements | 77,000,000 |  | 77,000,000 | 23,800,000 |  |  |  |  |
Accrued Reclamation Costs, Current | 43,900,000 |  | 43,900,000 | 15,000,000 |  |  |  |  |
Financial Instrument, Surety Bonds Amount | $ 1,376,800,000 |  | 1,376,800,000 |  |  |  |  |  |
Line of Credit Facility, Collateral | 111.0 million |  |  |  |  |  |  |  |
Surety Bond |  |  |  |  |  |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |
Transaction support agreements, additional collateral to be posted |  |  |  |  |  |  |  | $ 75,000,000 |
Debt instrument, transaction support agreements, fair value of second liens on mining equipment |  |  |  |  |  |  |  | 200,000,000 |
Transaction support agreements, additional collateral to be posted per year through 2024 |  |  |  |  |  |  |  | 25,000,000 |
Transaction support agreements, additional collateral term, free cash flow in any twelve-month period |  |  |  |  |  |  |  | 100,000,000 |
Transaction support agreements, additional collateral term, sale of assets benchmark (in excess of) |  |  |  |  |  |  |  | $ 10,000,000 |
Debt Instrument, Transaction Support Agreements, Additional Collateral Posted |  |  | 102,400,000 |  |  |  |  |  |
Surety Bond | Subsequent Event |  |  |  |  |  |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Transaction Support Agreements, Additional Collateral Posted |  | $ 74,400,000 |  |  |  |  |  |  |
Accounts Receivable Securitization Program, April 3, 2020 |  |  |  |  |  |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |
Exit facility, maximum borrowing capacity |  |  |  |  |  |  | $ 175,000,000 |  | $ 250,000,000
Line of credit facility, remaining borrowing capacity | $ 7,000,000 |  | 7,000,000 |  |  |  |  |  |
Accounts Receivable Securitization Program, April 3, 2020 | Scenario, Forecast |  |  |  |  |  |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |
Exit facility, maximum borrowing capacity |  |  |  |  |  | $ 225,000,000 |  |  |
Secured Debt | Accounts Receivable Securitization Program, April 3, 2020 |  |  |  |  |  |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |
Letters of credit outstanding, amount | 168,000,000 |  | 168,000,000 |  |  |  |  |  |
Long-term debt | 0 |  | 0 |  |  |  |  |  |
Interest expense |  |  | $ 3,800,000 | $ 2,900,000 | $ 2,600,000 |  |  |  |
Secured Debt | Accounts Receivable Securitization Program, April 3, 2020 | LIBOR |  |  |  |  |  |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  | 2.10% |  |  |  |  |  |
Letter of Credit |  |  |  |  |  |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |
Letters of credit outstanding, amount | 103,300,000 |  | $ 103,300,000 |  |  |  |  |  |
Exit facility, maximum borrowing capacity | $ 250,000,000 |  | $ 250,000,000 |  |  |  |  |  |
Cash Collateral, Percentage of the aggregate amount of letters of credit outstanding | 103.00% |  | 103.00% |  |  |  |  |  |
Stated interest rate | 0.75% |  | 0.75% |  |  |  |  |  |
Letter of Credit | Maximum |  |  |  |  |  |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |
Transaction support agreements, additional collateral demands | $ 5,000,000 |  | $ 5,000,000 |  |  |  |  |  |

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