CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (unaudited) - 9 months ended Sep. 30, 2018 - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive (Loss) Earnings
Balance at Dec. 31, 2017	$ 4,383,180	$ 256,992	$ 942,485	$ (5,077,039)	$ 8,455,501	$ (194,759)
Net earnings	428,698	0	0	0	428,698	0
Dividends paid	(213,126)	0	0	0	(213,126)	0
Separation of Apergy	(906,815)	0	0	0	(939,743)	32,928
Common stock issued for the exercise of share-based awards	(44,443)	783	(45,226)	0	0	0
Share-based compensation expense	16,590	0	16,590	0	0	0
Common stock acquired, including accelerated share repurchase program	(892,771)	0	(140,000)	(752,771)	0	0
Other comprehensive loss, net of tax	(18,638)	0	0	0	0	(18,638)
Other, net	(4,916)	0	(4,916)	0	0	0
Balance at Sep. 30, 2018	2,747,934	257,775	768,933	(5,829,810)	7,744,361	(193,325)
Cumulative Effect of New Accounting Principle in Period of Adoption | Accounting Standards Update 2018-02 [Member]	0	0	0	0	12,856	(12,856)
Cumulative Effect of New Accounting Principle in Period of Adoption | Accounting Standards Update 2014-09 [Member]	$ 175	$ 0	$ 0	$ 0	$ 175	$ 0