Accumulated Other Comprehensive Loss (Components of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period			$ 4,320,796
Components of other comprehensive income (loss):
Before reclassifications to income and retained earnings			(33,525)
Reclassifications to income			6,509
Other comprehensive (loss) income	$ (48,372)	$ 22,091	(27,016)	$ 47,814
Balance at end of period	4,488,230	$ 4,041,828	4,488,230	$ 4,041,828
Foreign Currency Translation Gains (Losses)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period			(311,895)
Components of other comprehensive income (loss):
Before reclassifications to income and retained earnings			(33,525)
Reclassifications to income			0
Other comprehensive (loss) income			(33,525)
Balance at end of period	(345,420)		(345,420)
Retirement and Postretirement Benefit Plan Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period			(215,816)
Components of other comprehensive income (loss):
Before reclassifications to income and retained earnings			0
Reclassifications to income			6,509
Other comprehensive (loss) income			6,509
Balance at end of period	(209,307)		(209,307)
Reclassifications before taxes, included in net periodic benefit expense			(8,256)
Deferred Loss on Interest Rate Derivative Hedges
Components of other comprehensive income (loss):
Reclassifications, income tax expense			1,747
Total
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period			(527,711)
Components of other comprehensive income (loss):
Balance at end of period	$ (554,727)		$ (554,727)