Accumulated Other Comprehensive Income (Loss) (AOCI balances) (Details 2) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
As of	$ 3,326,796	$ 2,916,782
Other Comprehensive (Loss) Income, Net of Tax	(37,943)	8,290
As of	3,212,840	2,999,536
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
As of	303,295
Other comprehensive loss before reclassifications	(38,629)
Net amount reclassified from accumulated other comprehensive income (loss)	686
Other Comprehensive (Loss) Income, Net of Tax	(37,943)
As of	265,352
Cumulative Foreign Currency Translation Adjustment [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
As of	(21,888)
Other comprehensive loss before reclassifications	(37,376)
Net amount reclassified from accumulated other comprehensive income (loss)	0
Other Comprehensive (Loss) Income, Net of Tax	(37,376)	10,033
As of	(59,264)
Unrealized Gain on Pensions and Other Postretirement Plans [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
As of	325,921
Other comprehensive loss before reclassifications	0
Net amount reclassified from accumulated other comprehensive income (loss)	650	(1,384)
Other Comprehensive (Loss) Income, Net of Tax	650	(1,384)
As of	326,571
Cash Flow Hedges [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
As of	(738)
Other comprehensive loss before reclassifications	(1,253)
Net amount reclassified from accumulated other comprehensive income (loss)	36
Other Comprehensive (Loss) Income, Net of Tax	(1,217)	$ (359)
As of	$ (1,955)