Accumulated Other Comprehensive Income (Loss) (AOCI balances) (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
As of	$ 4,411,669	$ 3,766,393	$ 3,326,796
Other Comprehensive (Loss) Income, Net of Tax	(635,237)	368,074	300,019
As of	3,752,661	4,411,669	3,766,393
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
As of	971,388	603,314
Other comprehensive (loss) income before reclassifications	(585,143)	369,252
Net amount reclassified from accumulated other comprehensive income	(50,094)	(1,178)
Other Comprehensive (Loss) Income, Net of Tax	(635,237)	368,074
As of	336,151	971,388	603,314
Foreign Currency Translation Adjustments [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
As of	(6,298)	9,754
Other comprehensive (loss) income before reclassifications	(48,340)	(16,052)
Net amount reclassified from accumulated other comprehensive income	0	0
Other Comprehensive (Loss) Income, Net of Tax	(48,340)	(16,052)	31,642
As of	(54,638)	(6,298)	9,754
Unrealized Gain (Loss) on Pensions and Other Postretirement Plans [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
As of	979,157	595,287
Other comprehensive (loss) income before reclassifications	(540,079)	385,679
Net amount reclassified from accumulated other comprehensive income	(50,487)	(1,809)	2,846
Other Comprehensive (Loss) Income, Net of Tax	(590,566)	383,870	269,366
As of	388,591	979,157	595,287
Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
As of	(1,471)	(1,727)
Other comprehensive (loss) income before reclassifications	3,276	(375)
Net amount reclassified from accumulated other comprehensive income	393	631
Other Comprehensive (Loss) Income, Net of Tax	3,669	256	(989)
As of	$ 2,198	$ (1,471)	$ (1,727)