ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
AOCI Attributable to Parent [Roll Forward]
Balance as of Beginning of Period	$ 14,818,713	$ 14,543,588	$ 14,173,892	$ 15,554,098	$ 15,749,371	$ 15,473,158	$ 14,173,892	$ 15,473,158
OCI Before Reclassifications							(900)	100
Amounts Reclassified from AOCI							6,400	15,300
Other Comprehensive (Loss)/Income, Net of Tax							5,500	15,400
Balance as of End of Period	15,044,424	14,818,713	14,543,588	15,685,941	15,554,098	15,749,371	15,044,424	15,685,941
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent [Roll Forward]
Balance as of Beginning of Period	(29,581)	(28,534)	(33,737)	(32,103)	(36,191)	(39,421)	(33,737)	(39,421)
Balance as of End of Period	(28,205)	$ (29,581)	(28,534)	(24,022)	$ (32,103)	(36,191)	(28,205)	(24,022)
Qualified Cash Flow Hedging Instruments
AOCI Attributable to Parent [Roll Forward]
Balance as of Beginning of Period			(400)			(400)	(400)	(400)
OCI Before Reclassifications							0	0
Amounts Reclassified from AOCI							0	0
Other Comprehensive (Loss)/Income, Net of Tax							0	0
Balance as of End of Period	(400)			(400)			(400)	(400)
Unrealized Gains/(Losses) on Marketable Securities
AOCI Attributable to Parent [Roll Forward]
Balance as of Beginning of Period						(1,200)		(1,200)
OCI Before Reclassifications								0
Amounts Reclassified from AOCI								1,200
Other Comprehensive (Loss)/Income, Net of Tax								1,200
Balance as of End of Period				0				0
Defined Benefit Plans
AOCI Attributable to Parent [Roll Forward]
Balance as of Beginning of Period			$ (33,300)			$ (37,800)	(33,300)	(37,800)
OCI Before Reclassifications							(900)	100
Amounts Reclassified from AOCI							6,400	14,100
Other Comprehensive (Loss)/Income, Net of Tax							5,500	14,200
Balance as of End of Period	$ (27,800)			$ (23,600)			$ (27,800)	$ (23,600)