Accumulated Other Comprehensive Income (Loss) (AOCI balances) (Details 2) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
As of	$ 4,472,941	$ 4,411,669	$ 3,864,839	$ 3,766,393	$ 4,411,669	$ 3,766,393
Other Comprehensive (Loss) Income, Net of Tax	(52,979)	(13,135)	1,080	(1,203)	(66,114)	(123)
As of	4,322,243	4,472,941	3,975,912	$ 3,864,839	4,322,243	3,975,912
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
As of		971,388			971,388
Other comprehensive (loss) income before reclassifications					(40,897)
Net amount reclassified from accumulated other comprehensive income (loss)					(25,217)
Other Comprehensive (Loss) Income, Net of Tax					(66,114)
As of	905,274				905,274
Cumulative Foreign Currency Translation Adjustment [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
As of		(6,298)			(6,298)
Other comprehensive (loss) income before reclassifications					(42,666)
Net amount reclassified from accumulated other comprehensive income (loss)					0
Other Comprehensive (Loss) Income, Net of Tax	(40,928)		1,167		(42,666)	681
As of	(48,964)				(48,964)
Unrealized Gain on Pensions and Other Postretirement Plans [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
As of		979,157			979,157
Other comprehensive (loss) income before reclassifications					0
Net amount reclassified from accumulated other comprehensive income (loss)	(12,891)		(97)		(25,552)	(1,291)
Other Comprehensive (Loss) Income, Net of Tax	(12,891)		(97)		(25,552)	(1,291)
As of	953,605				953,605
Cash Flow Hedges [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
As of		$ (1,471)			(1,471)
Other comprehensive (loss) income before reclassifications					1,769
Net amount reclassified from accumulated other comprehensive income (loss)					335
Other Comprehensive (Loss) Income, Net of Tax	840		$ 10		2,104	$ 487
As of	$ 633				$ 633