Goodwill And Related Intangible Assets (Schedule Of Goodwill Impairment Tests) (Details)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011 Maximum [Member]	Dec. 31, 2010 Maximum [Member]	Oct. 31, 2011 Minimum [Member]	Oct. 31, 2010 Minimum [Member]
Goodwill [Line Items]
Date of Impairment Test	October 31, 2011	October 31, 2010
WACC			12.50%	12.90%	10.80%	12.00%