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Stock-Based Compensation Plans (Schedule of Assumptions Used) (Details) (USD $)
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12 Months Ended | ||
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | |||
| Weighted-average dividend yield | 2.90% | 2.40% | 2.20% |
| Weighted-average risk-free interest rate | 1.65% | 1.60% | 0.79% |
| Weighted-average expected volatility | 35.39% | 52.32% | 53.31% |
| Weighted-average expected life in years | 5 years 3 months 18 days | 5 years 3 months 18 days | 5 years 3 months 18 days |
| Weighted-average fair value of options granted | $ 8.92 | $ 15.97 | $ 13.00 |