XML 104 R82.htm IDEA: XBRL DOCUMENT

Stock-Based Compensation Plans (Schedule Of Weighted-Average Assumptions For Grants Made) (Details)	12 Months Ended
	Dec. 31, 2011 years	Dec. 31, 2010 years	Dec. 31, 2009 years
Stock-Based Compensation Plans [Abstract]
Dividend yield	2.23%	2.68%	4.84%
Volatility	41.06%	40.37%	34.74%
Risk-free interest rate	1.79%	2.20%	1.79%
Expected lives in years	4.29	4.29	4.20

The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior.

+ References+ Details