Stock-Based Compensation Plans (Schedule of Assumptions Used) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Stock-Based Compensation Plans [Abstract]
Dividend yield	2.20%	3.04%	3.10%
Weighted average risk-free interest rate	0.79%	1.95%	2.36%
Weighted average expected volatility	53.31%	51.90%	50.50%
Weighted average expected life in years	5 years 3 months 18 days	5 years 1 month 13 days	5 years 1 month 13 days
Weighted average fair value of options granted	$ 13.0	$ 12.3	$ 11.72