Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash Flows from Operating Activities:
Consolidated net earnings	$ 1,169.4	$ 866.8	$ 702.8
Adjustments to reconcile consolidated net earnings to net cash provided by operating activities:
Depreciation, depletion and amortization	513.2	506.0	451.7
Stock-based compensation expense	50.0	42.7	43.0
Net gains on divestitures, sales of assets and extinguishment of debt	(1.9)	(195.7)	(21.7)
Deferred income taxes, net	(36.1)	(0.6)	92.2
Other items, net	(16.5)	(11.7)	(14.9)
Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
Accounts receivable, net	31.4	(12.1)	(194.4)
Inventories, net	(188.7)	(131.7)	73.2
Accounts payable	(17.0)	(31.2)	109.8
Other assets and liabilities, net	24.6	(41.3)	(104.0)
Net Cash Provided by Operating Activities	1,528.4	991.2	1,137.7
Cash Flows from Investing Activities:
Additions to property, plant and equipment	(650.3)	(481.8)	(423.1)
Acquisitions, net of cash acquired	0.0	11.0	(3,109.2)
Proceeds from divestitures and sales of assets	426.5	687.1	42.8
Proceeds from sale of restricted investments to discharge long term debt	700.0	0.0	0.0
Purchase of restricted investments to discharge long-term debt	0.0	(704.6)	0.0
Repayment of note receivable from affiliate	6.0	0.0	0.0
Investments in life insurance contracts, net	7.4	7.5	14.9
Investments in limited liability company	(27.0)	0.0	0.0
Other investing activities, net	(3.9)	(3.0)	0.0
Net Cash Provided by (Used for) Investing Activities	458.7	(483.8)	(3,474.6)
Cash Flows from Financing Activities:
Borrowings of long-term debt	0.0	0.0	2,896.7
Repayments of long-term debt	(700.0)	(54.5)	(420.1)
Debt issuance and extinguishment costs	(0.7)	(0.7)	(7.5)
Payments on finance lease obligations	(17.6)	(15.0)	(11.1)
Dividends paid	(174.0)	(159.1)	(147.8)
Repurchases of common stock	(150.0)	(150.0)	0.0
Contributions by noncontrolling interest to joint venture	0.1	0.0	0.0
Distributions to owners of noncontrolling interest	(0.5)	0.0	(0.6)
Proceeds from exercise of stock options	1.2	0.6	1.3
Shares withheld for employees’ income tax obligations	(22.1)	(28.8)	(19.5)
Net Cash (Used for) Provided by Financing Activities	(1,063.6)	(407.5)	2,291.4
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	923.5	99.9	(45.5)
Cash, Cash Equivalents and Restricted Cash, beginning of year	358.8	258.9	304.4
Cash, Cash Equivalents and Restricted Cash, end of year	$ 1,282.3	$ 358.8	$ 258.9