CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Assets
Cash and cash equivalents	$ 271,589	$ 40,037
Restricted cash	2,917	4,367
Accounts and notes receivable
Customers, less allowance for doubtful accounts 2019 — $3,125; 2018 — $2,090	532,012	512,279
Other	38,104	28,499
Inventories	458,308	429,330
Other current assets	76,396	64,633
Total current assets	1,379,326	1,079,145
Investments and long-term receivables	60,709	44,615
Property, plant & equipment, net	4,316,038	4,237,307
Operating lease right-of-use assets, net	408,189	0
Goodwill	3,167,061	3,165,396
Other intangible assets, net	1,091,475	1,095,378
Other noncurrent assets	225,995	210,289
Total assets	10,648,793	9,832,130
Liabilities
Current maturities of long-term debt	25	23
Short-term debt	0	133,000
Trade payables and accruals	265,159	216,473
Accrued salaries, wages and management incentives	97,228	91,960
Accrued interest	19,167	19,631
Other current liabilities	153,984	141,463
Total current liabilities	535,563	602,550
Long-term debt	2,784,315	2,779,357
Deferred income taxes, net	633,039	567,283
Deferred management incentive and other compensation	22,856	16,604
Pension benefits	142,363	119,587
Other postretirement benefits	35,848	35,274
Asset retirement obligations	210,323	225,726
Deferred revenue	179,880	186,397
Operating lease liabilities	388,042	0
Other noncurrent liabilities	94,707	96,449
Total liabilities	5,026,936	4,629,227
Other commitments and contingencies (Note 12)
Equity
Common stock, $1 par value, Authorized 480,000 shares, Outstanding 132,371 and 131,762 shares, respectively	132,371	131,762
Capital in excess of par value	2,791,353	2,798,486
Retained earnings	2,895,871	2,444,870
Accumulated other comprehensive loss	(197,738)	(172,215)
Total equity	5,621,857	5,202,903
Total liabilities and equity	$ 10,648,793	$ 9,832,130