Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash Flows from Operating Activities:
Consolidated net earnings	$ 121.6	$ 21.3
Adjustments to reconcile consolidated net earnings to net cash provided by operating activities:
Depreciation, depletion and amortization	123.6	128.2
Stock-based compensation expense	13.7	12.0
Gains on sales of assets	(1.0)	(2.9)
Deferred income taxes, net	6.3	5.2
Other items, net	(1.7)	(0.9)
Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
Accounts receivable, net	(13.7)	14.8
Inventories, net	(82.4)	(28.9)
Accounts payable	17.8	95.5
Other assets and liabilities, net	(23.7)	(74.4)
Net Cash Provided by Operating Activities	160.5	169.9
Cash Flows from Investing Activities:
Additions to property, plant and equipment	(173.9)	(139.8)
Acquisitions, net of cash acquired	0.0	18.8
Proceeds from sales of assets	22.3	1.0
Investments in life insurance contracts, net	3.1	0.0
Other investing activities, net	(3.9)	(3.0)
Net Cash Used for Investing Activities	(152.4)	(123.0)
Cash Flows from Financing Activities:
Payments on finance lease obligations	(4.3)	(3.7)
Dividends paid	(41.6)	(38.9)
Repurchases of common stock	(75.0)	(50.0)
Proceeds from exercise of stock options	0.2	0.6
Shares withheld for employees' income tax obligations	(16.7)	(24.2)
Net Cash Used for Financing Activities	(137.4)	(116.2)
Net Decrease in Cash, Cash Equivalents and Restricted Cash	(129.3)	(69.3)
Cash, Cash Equivalents and Restricted Cash, beginning of period	358.8	258.9
Cash, Cash Equivalents and Restricted Cash, end of period	$ 229.5	$ 189.6