Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash Flows from Operating Activities:
Consolidated net earnings	$ 65.5	$ 25.9
Adjustments to reconcile consolidated net earnings to net cash provided by operating activities:
Depreciation, depletion and amortization	98.6	95.0
Stock-based compensation expense	10.9	12.5
Gain on divestitures and sales of assets	(3.8)	(1.5)
Deferred income taxes	(4.7)	3.2
Other items, net	(4.7)	(0.4)
Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
Accounts receivable, net	11.5	10.2
Inventories, net	19.0	(9.6)
Accounts payable	25.0	4.9
Other assets and liabilities, net	(25.4)	(33.5)
Net Cash Provided by Operating Activities	191.9	106.7
Cash Flows from Investing Activities:
Additions to property, plant and equipment	(110.3)	(104.1)
Proceeds from divestitures and sales of assets	12.2	15.9
Investments in life insurance contracts, net	9.8	(7.2)
Other investing activities, net		(0.1)
Net Cash Used for Investing Activities	(88.3)	(95.5)
Cash Flows from Financing Activities:
Borrowings of debt		618.0
Repayments of debt		(127.0)
Payments on financing leases	(2.2)	(0.8)
Debt issuance costs		(1.1)
Repurchases of common stock		(50.0)
Dividends paid	(36.1)	(34.8)
Proceeds from exercise of stock options	0.6	0.2
Shares withheld for employees' income tax obligations	(15.5)	(12.7)
Net Cash (Used for) Provided by Financing Activities	(53.2)	391.8
Net Increase in Cash, Cash Equivalents and Restricted Cash	50.4	403.0
Cash, Cash Equivalents and Restricted Cash, beginning of period	304.4	21.0
Cash, Cash Equivalents and Restricted Cash, end of period	$ 354.8	$ 424.0