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Equity Method Investments | 9 Months Ended
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Sep. 30, 2025
Equity Method Investment, Summarized Financial Information [Abstract] |
Equity Method Investments | Equity Method Investments The Company’s equity method investments include its interests in Middlemount Coal Pty Ltd. (Middlemount), R3 Renewables LLC (R3), R3 Renewables II LLC (R3 II) and certain other equity method investments. The table below summarizes the book value of those investments, which are reported in “Investments and other assets” in the condensed consolidated balance sheets, and the related “Loss from equity affiliates” in the unaudited condensed consolidated statements of operations:
|  |  | Loss (Income) from Equity Affiliates
| Book Value at |  | Three Months Ended September 30, |  | Nine Months Ended September 30,
| September 30, 2025 |  | December 31, 2024 |  | 2025 |  | 2024 |  | 2025 |  | 2024
| (Dollars in millions)
Equity method investment related to Middlemount | $ | 47.3 |  |  | $ | 52.7 |  |  | $ | 1.2 |  |  | $ | (2.2) |  |  | $ | 8.0 |  |  | $ | (4.1) |
Equity method investment related to R3 | — |  |  | — |  |  | — |  |  | 4.3 |  |  | — |  |  | 11.2 |
Equity method investment related to R3 II | 2.0 |  |  | 5.8 |  |  | 1.4 |  |  | — |  |  | 2.2 |  |  | — |
Total equity method investments | $ | 49.3 |  |  | $ | 58.5 |  |  | $ | 2.6 |  |  | $ | 2.1 |  |  | $ | 10.2 |  |  | $ | 7.1 |
R3 and R3 II In March 2022, the Company entered into a joint venture with unrelated partners to form R3, an entity in which the Company held a 50% interest. R3 was formed with the intent of developing various sites, including certain reclaimed mining land held by the Company in the U.S., for utility-scale photovoltaic solar generation and battery storage. The Company contributed $10.8 million to R3 during the nine months ended September 30, 2024. In November 2024, R3 sold seven projects to an unrelated party and contributed its remaining three projects to a new entity (R3 II). The unrelated party purchased 75% of the equity in R3 II for cash and contingent consideration for the future obligation to pay seller’s milestone payments. R3 used the proceeds from the equity purchase of R3 II to repurchase shares from the other investors of R3, such that Peabody is the only remaining equity holder of R3, which has a 25% equity interest in R3 II. The Company contributed $0.7 million to R3 II during the nine months ended September 30, 2025.

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- Definition The entire disclosure for equity method investments and joint ventures. Equity method investments are investments that give the investor the ability to exercise significant influence over the operating and financial policies of an investee. Joint ventures are entities owned and operated by a small group of businesses as a separate and specific business or project for the mutual benefit of the members of the group. + References Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Topic 740 -SubTopic 323 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478156/740-323-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481687/323-10-50-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481687/323-10-50-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Topic 323 -Publisher FASB -URI https://asc.fasb.org/323/tableOfContent + Details
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