Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive (Loss) by Component (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
AOCI Attributable to Parent [Roll Forward]
Beginning balance	$ 4,351,851	$ 4,416,985	$ 3,804,447
Ending balance	4,440,363	4,351,851	4,416,985
Pension and Other Post-Retirement Benefits
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(581,000)	(517,941)	(506,610)
Other comprehensive income (loss) before reclassifications, net of tax	(16,895)	(74,604)	(18,965)
Amounts reclassified from accumulated other comprehensive loss, net of tax	558,002	11,545	7,634
Ending balance	(39,893)	(581,000)	(517,941)
Cash Flow Hedges
AOCI Attributable to Parent [Roll Forward]
Beginning balance	0	0	(2,572)
Other comprehensive income (loss) before reclassifications, net of tax	0	0	2,765
Amounts reclassified from accumulated other comprehensive loss, net of tax	0	0	(193)
Ending balance	0	0	0
Foreign Currency Translation
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(680,743)	(458,931)	(523,360)
Other comprehensive income (loss) before reclassifications, net of tax	208,870	(221,812)	64,429
Amounts reclassified from accumulated other comprehensive loss, net of tax	0	0	0
Ending balance	(471,873)	(680,743)	(458,931)
Total
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(1,261,743)	(976,872)	(1,032,542)
Other comprehensive income (loss) before reclassifications, net of tax	191,975	(296,416)	48,229
Amounts reclassified from accumulated other comprehensive loss, net of tax	558,002	11,545	7,441
Ending balance	$ (511,766)	$ (1,261,743)	$ (976,872)