XML 15 R55.htm IDEA: XBRL DOCUMENT

Stock-Based Compensation Plans (Schedule Of Assumptions Used In The Black-Scholes Option-Pricing Model) (Details)	3 Months Ended
	Mar. 31, 2012 Y	Mar. 31, 2011 Y
Stock-Based Compensation Plans [Abstract]
Dividend yield	2.00%	2.20%
Expected volatility	43.30%	42.40%
Risk-free interest rate	1.10%	2.70%
Expected option term (years)	6.0	6.0

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