Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive (Loss) by Component (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
AOCI Attributable to Parent [Roll Forward]
Beginning balance	$ 3,804,447	$ 3,503,290
Other comprehensive income (loss) before reclassifications	(60,262)	(248,757)
Amounts reclassified from accumulated other comprehensive loss	5,542	32,180
Other comprehensive income (loss), net of income taxes	(54,720)	(216,577)
Ending balance	4,201,275	3,678,192
Pension and Other Post-Retirement Benefits
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(506,610)	(463,227)
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive loss	5,735	20,957
Other comprehensive income (loss), net of income taxes	5,735	20,957
Ending balance	(500,875)	(442,270)
Cash Flow Hedges
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(2,572)	(15,042)
Other comprehensive income (loss) before reclassifications	2,765	0
Amounts reclassified from accumulated other comprehensive loss	(193)	11,223
Other comprehensive income (loss), net of income taxes	2,572	11,223
Ending balance	0	(3,819)
Foreign Currency Translation
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(523,360)	(379,470)
Other comprehensive income (loss) before reclassifications	(63,027)	(248,757)
Amounts reclassified from accumulated other comprehensive loss	0	0
Other comprehensive income (loss), net of income taxes	(63,027)	(248,757)
Ending balance	(586,387)	(628,227)
Total
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(1,032,542)	(857,739)
Ending balance	$ (1,087,262)	$ (1,074,316)