CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating Activities
Net earnings	$ 532,719	$ 469,962
Adjustments to reconcile net earnings to net cash provided by operating activities
Depreciation, depletion, accretion and amortization	320,992	295,912
Noncash operating lease expense	32,697	27,820
Net gain on sale of property, plant & equipment and businesses	(120,316)	(2,317)
Contributions to pension plans	(6,032)	(6,540)
Share-based compensation expense	25,200	23,239
Deferred tax expense	71,449	50,346
Changes in assets and liabilities before initial effects of business acquisitions and dispositions	(144,635)	(76,545)
Other, net	12,742	(3,951)
Net cash provided by operating activities	724,816	777,926
Investing Activities
Purchases of property, plant & equipment	(318,620)	(268,989)
Proceeds from sale of property, plant & equipment	192,367	9,440
Proceeds from sale of businesses	0	651
Payment for businesses acquired, net of acquired cash	(1,634,492)	(5,668)
Other, net	161	10,819
Net cash used for investing activities	(1,760,584)	(253,747)
Financing Activities
Payment of current maturities and long-term debt	(1,444,024)	(250,018)
Proceeds from issuance of long-term debt	1,600,000	750,000
Debt issuance and exchange costs	(13,286)	(15,394)
Settlements of interest rate derivatives	0	(19,863)
Purchases of common stock	0	(26,132)
Dividends paid	(147,267)	(135,161)
Share-based compensation, shares withheld for taxes	(15,776)	(16,303)
Other, net	(5,462)	(1,084)
Net cash provided by (used for) financing activities	(25,815)	286,045
Net increase (decrease) in cash and cash equivalents and restricted cash	(1,061,583)	810,224
Cash and cash equivalents and restricted cash at beginning of year	1,198,013	274,506
Cash and cash equivalents and restricted cash at end of period	$ 136,430	$ 1,084,730