Income Taxes (Reconciliation Of The Statutory Federal Income Tax Rate To The Effective Tax Rate) (Details)		12 Months Ended
	Dec. 31, 2017	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Statutory federal income tax rate	21.00%	21.00%	21.00%	21.00%	35.00%
Effective Income Tax Rate Reconciliation, Percent [Abstract]
State income taxes (net of federal income tax benefit)		1.10%	1.10%	0.80%
Non-U.S. rate differential		(2.00%)	(1.60%)	(1.40%)
Resolution and expiration of statutes of limitation of uncertain tax positions		(3.00%)	(0.70%)	(2.10%)
Research credits, uncertain tax positions and other		0.50%	0.70%	9.30%
Excess tax benefits from stock-based compensation		(1.10%)	(1.60%)	(1.20%)
Effective income tax rate		16.50%	18.90%	26.40%