CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total		Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	Parent	Noncontrolling Interest
Balance at beginning of year at Dec. 31, 2016			$ 195,056	$ 916,799	$ 5,729,596	$ (628,212)	$ (1,296,560)		$ 0
Exercise of stock options, including income tax benefits			0	0
Restricted stock transactions and other				(26,553)
Stock-based compensation				27,496
Fair value increase in common controlled assets				0
Other				(77)
Net income (loss)	$ (311,789)	[1]			(311,789)				0
Reclassification of certain tax effects	0				0	0
Cash dividends					(172,565)
Foreign currency translation gains (losses), net of income taxes	171,725					171,725
Retirement and postretirement benefit plans, net of income taxes	(7,682)					(7,682)
Deferred loss on interest rate hedge reclassified to interest expense, net of income taxes						1,926
Other	0					0
Purchase of treasury shares							0
Sale of stock under employee stock purchase plans							146
Awarded restricted stock, net of forfeitures							20,885
Acquisition									0
Acquisition closing adjustments									0
Distributions to noncontrolling interest owners									0
Balance at end of year at Dec. 31, 2017	4,620,191		195,056	917,665	5,245,242	(462,243)	(1,275,529)	$ 4,620,191	0
Exercise of stock options, including income tax benefits			21	(362)
Restricted stock transactions and other				(33,920)
Stock-based compensation				27,920
Fair value increase in common controlled assets				68,339
Other				0
Net income (loss)	411,094	[1]			411,094				8,392
Reclassification of certain tax effects	(30,237)				30,237	(30,237)
Sale and leaseback gain recognized upon adoption of ASC 842, net of tax impact					0
Cash dividends					(173,044)
Foreign currency translation gains (losses), net of income taxes	(145,022)					(145,022)
Retirement and postretirement benefit plans, net of income taxes	29,110					29,110
Deferred loss on interest rate hedge reclassified to interest expense, net of income taxes						2,342
Other	(3,737)					(3,737)
Purchase of treasury shares							0
Sale of stock under employee stock purchase plans							0
Awarded restricted stock, net of forfeitures							26,367
Acquisition									359,951
Acquisition closing adjustments									0
Distributions to noncontrolling interest owners									0
Balance at end of year at Dec. 31, 2018	5,197,642	[2]	195,077	979,642	5,513,529	(609,787)	(1,249,162)	4,829,299	368,343
Exercise of stock options, including income tax benefits			12	(182)
Restricted stock transactions and other				(38,731)
Stock-based compensation				33,235
Fair value increase in common controlled assets				(24,519)
Other				0
Net income (loss)	1,149,732				1,149,732				103,570
Reclassification of certain tax effects	0				0	0
Sale and leaseback gain recognized upon adoption of ASC 842, net of tax impact					114,712
Cash dividends					(163,669)
Foreign currency translation gains (losses), net of income taxes	66,600					66,600
Retirement and postretirement benefit plans, net of income taxes	(35,979)					(35,979)
Deferred loss on interest rate hedge reclassified to interest expense, net of income taxes						5,005
Other	0					0
Purchase of treasury shares							(499,924)
Sale of stock under employee stock purchase plans							0
Awarded restricted stock, net of forfeitures							31,869
Acquisition									0
Acquisition closing adjustments									(6,604)
Distributions to noncontrolling interest owners									(128,158)
Balance at end of year at Dec. 31, 2019	$ 5,804,611		$ 195,089	$ 949,445	$ 6,614,304	$ (574,161)	$ (1,717,217)	$ 5,467,460	$ 337,151

[1] ¹ Reclassified to conform with current presentation (see Notes C and E). 2017 revenue is presented net of $58.9 million of transportation, gathering and processing costs as historically shown prior to the adoption of ASC 606 on January 1, 2018. See Notes to Consolidated Financial Statements, page 58.

[2] Reclassified to conform with current presentation (see Note E)