CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net (loss) including noncontrolling interest	$ (27,040)	$ (324,400)	$ (293,864)	$ (833,102)
Other comprehensive (loss) income, net of tax
Net (loss) gain from foreign currency translation	17,945	50,568	37,842	(67,843)
Retirement and postretirement benefit plans	4,146	(39,234)	8,282	(48,945)
Deferred loss on interest rate hedges reclassified to interest expense	0	309	1,690	608
Other comprehensive (loss) income	22,091	11,643	47,814	(116,180)
COMPREHENSIVE (LOSS)	$ (4,949)	$ (312,757)	$ (246,050)	$ (949,282)