UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Millions	6 Months Ended
	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)
Cash Flows From Operating Activities
Net income	$ 12.0	$ 254.2
Loss from discontinued operations, net of income taxes	0.7	2.3
(Loss) income from continuing operations before incomes taxes	12.7	256.5
Adjustments to reconcile income from continuing operations, net of income taxes to net cash provided by operating activities:
Depreciation, depletion and amortization	185.5	162.7
Noncash interest expense	3.3	3.2
Deferred income taxes	(2.4)	18.7
Noncash share-based compensation	5.3	4.1
Net gain on disposals	(20.0)	(9.6)
Noncash income from port and rail capacity assignment	0.0	(0.3)
Loss from equity affiliates	7.6	5.0
Shoal Creek insurance recovery	0.0	(109.5)
Unrealized (gains) losses on foreign currency option contracts	(8.4)	3.3
Changes in current assets and liabilities:
Accounts receivable	51.3	(27.3)
Inventories	(24.2)	(70.4)
Other current assets	23.7	18.4
Accounts payable and accrued expenses	(60.2)	(234.0)
Collateral arrangements	(5.3)	149.6
Asset retirement obligations	5.0	(2.7)
Postretirement benefit obligations	(22.9)	(30.1)
Pension obligations	(4.9)	0.0
Other, net	(1.8)	(7.6)
Net cash provided by continuing operations	144.3	130.0
Net cash used in discontinued operations	(1.2)	(3.2)
Net cash provided by operating activities	143.1	126.8
Cash Flows From Investing Activities
Additions to property, plant, equipment and mine development	(164.6)	(167.0)
Changes in accrued expenses related to capital expenditures	(42.0)	(13.7)
Asset Acquisition, Consideration Transferred	0.0	(143.8)
Proceeds from Insurance Settlement, Investing Activities	0.0	5.6
Proceeds from disposal of assets, net of receivables	12.5	15.5
Contributions to joint ventures	(291.3)	(373.5)
Distributions from joint ventures	306.7	360.6
Other, net	(2.0)	(0.5)
Net cash used in investing activities	(180.7)	(316.8)
Cash Flows From Financing Activities
Repayments of long-term debt	(7.6)	(4.6)
Payment of debt issuance and other deferred financing costs	(1.8)	(11.1)
Common stock repurchases	0.0	(83.1)
Excise taxes paid related to common stock repurchases	(1.7)	0.0
Repurchase of employee common stock relinquished for tax withholding	(0.8)	(4.1)
Dividends paid	(18.3)	(19.1)
Distributions to noncontrolling interests	(14.7)	(18.5)
Net cash used in financing activities	(44.9)	(140.5)
Net change in cash, cash equivalents and restricted cash	(82.5)	(330.5)
Cash, cash equivalents and restricted cash at beginning of period (1)	1,382.6	1,650.2
Cash, cash equivalents and restricted cash at end of period (2)	1,300.1	$ 1,319.7
Cash and cash equivalents	585.9
Restricted Cash	$ 714.2