Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 423,635	$ 531,451	$ 521,759
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	8,795	(25,010)	46,280
Marketable securities	0	0	1,194
Derivative financial instruments	(16,371)
Derivative financial instruments		20,009	(29,778)
Pension and postretirement benefit plans	100,311	(16,286)	47,636
Total other comprehensive (loss) income, net of tax	92,735	(21,287)	65,332
Comprehensive income	$ 516,370	$ 510,164	$ 587,091

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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