Stock-Based Compensation And Other Incentive Plans (Weighted Average Assumptions Used In Option Pricing) (Details) (USD $)	12 Months Ended
Dec. 31, 2011 years	Dec. 31, 2010 years	Dec. 31, 2009 years
Stock Based Compensation And Other Incentive Plans [Abstract]
Weighted average grant-date fair value per share of options granted	$ 14.18	$ 9.43	$ 6.63
Risk-free interest rate	1.92%	2.16%	1.75%
Expected dividend yield	1.25%	1.99%	2.56%
Expected volatility	57.40%	57.10%	69.30%
Expected life (in years)	4.5	4.5	4.5

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.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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