CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Assets
Cash and cash equivalents	$ 135,683	$ 1,197,068	$ 1,084,100
Restricted cash	747	945	630
Accounts and notes receivable
Accounts and notes receivable, gross	948,347	558,848	647,362
Allowance for credit losses	(10,158)	(2,551)	(3,155)
Accounts and notes receivable, net	938,189	556,297	644,207
Inventories
Finished products	411,872	378,389	384,575
Raw materials	58,223	33,780	34,562
Products in process	3,815	4,555	5,098
Operating supplies and other	38,320	31,861	31,226
Inventories	512,230	448,585	455,461
Other current assets	131,567	74,270	80,935
Total current assets	1,718,416	2,277,165	2,265,333
Investments and long-term receivables	34,108	34,301	41,778
Property, plant & equipment
Property, plant & equipment, cost	10,362,862	9,102,086	8,958,342
Allowances for depreciation, depletion & amortization	(4,815,913)	(4,676,087)	(4,614,543)
Property, plant & equipment, net	5,546,949	4,425,999	4,343,799
Operating lease right-of-use assets, net	656,881	423,128	431,227
Goodwill	3,674,763	3,172,112	3,172,112
Other intangible assets, net	1,819,778	1,123,544	1,107,091
Other noncurrent assets	237,107	230,656	229,193
Total assets	13,688,002	11,686,905	11,590,533
Liabilities
Current maturities of long-term debt	12,228	515,435	509,435
Trade payables and accruals	410,340	273,080	263,296
Other current liabilities	454,125	259,368	297,162
Total current liabilities	876,693	1,047,883	1,069,893
Long-term debt	3,874,116	2,772,240	2,777,072
Deferred income taxes, net	1,053,415	706,050	685,520
Deferred revenue	168,138	174,045	174,488
Noncurrent operating lease liabilities	622,275	399,582	407,336
Other noncurrent liabilities	644,226	559,775	547,872
Total liabilities	7,238,863	5,659,575	5,662,181
Other commitments and contingencies (Note 8)
Equity
Common stock, $1 par value, Authorized 480,000 shares, Outstanding 132,704, 132,516 and 132,454 shares, respectively	132,704	132,516	132,454
Capital in excess of par value	2,810,257	2,802,012	2,797,222
Retained earnings	3,659,657	3,274,107	3,204,671
Accumulated other comprehensive loss	(176,520)	(181,305)	(205,995)
Total shareholders' equity	6,426,098	6,027,330	5,928,352
Noncontrolling interest	23,041	0	0
Total equity	6,449,139	6,027,330	5,928,352
Total liabilities and equity	$ 13,688,002	$ 11,686,905	$ 11,590,533