Income Taxes (Reconciliation Of Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Balance as of January 1	$ 1,330,713	$ 65,631
Additions based on tax positions related to the current year	2,302	1,304,447
Additions for tax positions of acquired companies	2,094	1,413
Additions for tax positions of prior years	4,744	5,098
Transition tax planning initiatives	0	(27,470)
Reductions resulting from the lapse of the statute of limitations	(2,729)	(8,110)
Reductions due to Luxembourg tax rate change	(46,841)	0
Settlements with taxing authorities	(1,929)	(9,773)
Effects of foreign currency translation	(27,384)	(523)
Balance as of December 31	$ 1,260,970	$ 1,330,713