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v3.25.0.1

Other Events (Details) $ in Millions, $ in Millions |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Nov. 25, 2024 USD ($) | Apr. 16, 2024 USD ($) | Oct. 31, 2023 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2023 AUD ($) | Dec. 31, 2022 USD ($)
Other Commercial Events [Line Items] |  |  |  |  |  |  |
Shoal Creek insurance recovery |  |  |  | $ 109.5 | $ 0.0 |  | $ 0.0
Revenue related to excess port and rail capacity agreement |  |  |  |  | 19.2 |  |
Other Noncash Income |  |  |  | 0.3 | 9.6 |  | 0.0
Proceeds From Collaborative Arrangement Related to Port and Rail Capacity |  |  |  |  |  | $ 10.0 |
Collaborative Arrangement, Revenue Not from Contract with Customer |  |  |  |  |  | $ 30.0 |
Collaborative Arrangement Related to Port and Rail Capacity, Revenue Not from Contract with Customer |  |  |  |  | 6.7 |  |
Insurance proceeds attributable to Shoal Creek equipment losses |  |  |  | 10.9 | 0.0 |  | 0.0
Deposit associated with planned acquisition |  |  |  | 75.0 | 0.0 |  | $ 0.0
Wards Well coal deposit |  |  |  |  |  |  |
Other Commercial Events [Line Items] |  |  |  |  |  |  |
Contingent royalty |  | $ 200.0 |  |  |  |  |
Fair Value of Assets Acquired |  | 153.4 |  |  |  |  |
Asset Acquisition, Consideration Transferred, Transaction Cost |  | 9.4 |  |  |  |  |
Asset Acquisition, Consideration Transferred, Excluding Transaction Cost |  | 134.4 |  |  |  |  |
Noncash or Part Noncash Acquisition, Value of Assets Acquired |  | $ 9.6 |  |  |  |  |
Anglo American Acquisition |  |  |  |  |  |  |
Other Commercial Events [Line Items] |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross | $ 75.0 |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High | 1,000.0 |  |  |  |  |  |
Upfront cash payment for planned acquisition | 2,050.0 |  |  |  |  |  |
Fix deferred cash payments for planned acquisition | 725.0 |  |  |  |  |  |
Payments To Acquire Businesses, Maximum Total Consideration | $ 3,775.0 |  |  |  |  |  |
North Antelope Rochelle Mine |  |  |  |  |  |  |
Other Commercial Events [Line Items] |  |  |  |  |  |  |
Storm Damage Provision |  |  |  |  | 12.2 |  |
North Antelope Rochelle Mine | Materials and supplies inventories |  |  |  |  |  |  |
Other Commercial Events [Line Items] |  |  |  |  |  |  |
Storm Damage Provision |  |  |  |  | 4.0 |  |
North Antelope Rochelle Mine | Buildings and equipment |  |  |  |  |  |  |
Other Commercial Events [Line Items] |  |  |  |  |  |  |
Provision for buildings and equipment |  |  |  |  | 1.0 |  |
North Antelope Rochelle Mine | Incremental repair costs |  |  |  |  |  |  |
Other Commercial Events [Line Items] |  |  |  |  |  |  |
Storm Damage Provision |  |  |  | 3.7 | 7.2 |  |
Shoal Creek |  |  |  |  |  |  |
Other Commercial Events [Line Items] |  |  |  |  |  |  |
Shoal Creek insurance recovery |  |  |  | 109.5 |  |  |
Provision for loss related to fire |  |  |  |  | 28.7 |  |
Loss limits on insurance claim, amount |  |  | $ 125.0 |  |  |  |
Deductible |  |  | $ 50.0 |  |  |  |
Insurance proceeds attributable to Shoal Creek equipment losses |  |  |  | $ 10.9 |  |  |
Shoal Creek | Longwall and development and other costs |  |  |  |  |  |  |
Other Commercial Events [Line Items] |  |  |  |  |  |  |
Provision for loss related to fire |  |  |  |  | 17.8 |  |
Shoal Creek | Equipment deemed inoperable |  |  |  |  |  |  |
Other Commercial Events [Line Items] |  |  |  |  |  |  |
Provision for loss related to fire |  |  |  |  | $ 10.9 |  |

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