Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive (Loss) by Component (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
AOCI Attributable to Parent [Roll Forward]
Beginning balance	$ 4,351,851	$ 4,416,985
Other comprehensive income (loss) before reclassifications		25,359
Amounts reclassified from accumulated other comprehensive loss		8,661
Other comprehensive income (loss), net of income taxes		34,020
Ending balance	4,805,127	4,710,154
Total
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(1,261,743)	(976,872)
Other comprehensive income (loss) before reclassifications	171,353
Amounts reclassified from accumulated other comprehensive loss	11,048
Other comprehensive income (loss), net of income taxes	182,401
Ending balance	(1,079,342)	(942,852)
Pension and Other Post-Retirement Benefits
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(581,000)	(517,941)
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive loss	11,048	8,661
Other comprehensive income (loss), net of income taxes	11,048	8,661
Ending balance	(569,952)	(509,280)
Foreign Currency Translation
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(680,743)	(458,931)
Other comprehensive income (loss) before reclassifications	171,353	25,359
Amounts reclassified from accumulated other comprehensive loss	0	0
Other comprehensive income (loss), net of income taxes	171,353	25,359
Ending balance	$ (509,390)	$ (433,572)