Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive (Loss) by Component (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
AOCI Attributable to Parent [Roll Forward]
Beginning balance	$ 3,503,290	$ 3,218,003
Other comprehensive loss before reclassifications	(116,946)	6,836
Amounts reclassified from accumulated other comprehensive loss	21,457	26,112
Other comprehensive income (loss), net of income taxes	(95,489)	32,948
Ending balance	3,653,563	3,245,145
Total
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(857,739)	(1,036,502)
Ending balance	(953,228)	(1,003,554)
Pension and Other Post-Retirement Benefits
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(463,227)	(692,868)
Other comprehensive loss before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive loss	13,975	18,630
Other comprehensive income (loss), net of income taxes	13,975	18,630
Ending balance	(449,252)	(674,238)
Cash Flow Hedges
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(15,042)	(30,007)
Other comprehensive loss before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive loss	7,482	7,482
Other comprehensive income (loss), net of income taxes	7,482	7,482
Ending balance	(7,560)	(22,525)
Foreign Currency Translation
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(379,470)	(313,627)
Other comprehensive loss before reclassifications	(116,946)	6,836
Amounts reclassified from accumulated other comprehensive loss	0	0
Other comprehensive income (loss), net of income taxes	(116,946)	6,836
Ending balance	$ (496,416)	$ (306,791)