CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss) including noncontrolling interest	$ 137,309	$ (266,608)	$ (156,555)	$ (1,099,710)
Other comprehensive (loss) income, net of tax
Net (loss) gain from foreign currency translation	(31,308)	28,323	6,534	(39,520)
Retirement and postretirement benefit plans	4,653	3,726	12,935	(45,219)
Deferred loss on interest rate hedges reclassified to interest expense	0	297	1,690	905
Other comprehensive (loss) income	(26,655)	32,346	21,159	(83,834)
COMPREHENSIVE INCOME (LOSS)	$ 110,654	$ (234,262)	$ (135,396)	$ (1,183,544)