Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (564,372)	$ 224,430	$ (427,837)	$ 384,680
Foreign currency translation adjustments, net of income taxes in 2020 — $12,114 and $3,445; 2019 — $4,015 and $3,695, respectively	111,599	9	(71,014)	47,973
Cash flow hedge adjustments, net of income taxes in 2020 — $560 and $6,044; 2019 — $3,711 and $5,626, respectively	1,514	(10,034)	(16,342)	(15,213)
Pension and postretirement benefit adjustments, net of income taxes in 2020 — $3,008 and $6,025; 2019 — $1,786 and $3,574, respectively	7,844	4,833	16,292	9,665
Other comprehensive income (loss), net of income taxes	120,957	(5,192)	(71,064)	42,425
Comprehensive (loss) income	$ (443,415)	$ 219,238	$ (498,901)	$ 427,105