Stock-Based Compensation (Valuation Assumptions) (Details) - $ / shares |
12 Months Ended | ||
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Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
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| Share-based Payment Arrangement [Abstract] | |||
| Granted (in dollars per share) | $ 8.59 | $ 10.46 | $ 11.72 |
| Grant date strike price (in dollars per share) | $ 53.40 | $ 52.44 | $ 61.40 |
| Expected volatility | 24.30% | 22.24% | 22.72% |
| Expected life | 4 years 3 months | 6 years 3 months | 4 years 3 months |
| Risk-free interest rate | 1.21% | 2.63% | 2.73% |
| Projected dividend yield | 2.40% | 2.21% | 1.63% |
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- References No definition available.
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- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition 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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Exercise Price No definition available.
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