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Stock Compensation (Tables) | 12 Months Ended
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Dec. 31, 2016
Equity [Abstract] |
Assumptions Used To Value Share-Based Compensation |
| Year Ended December 31
| 2016 |  | 2015 |  | 2014
Dividend yield | 3% |  | 2% |  | 2%
Risk-free interest rate | 1% |  | 2% |  | 2%
Stock volatility | 25% |  | 28% |  | 37%
Average expected life (years) | 6 |  | 6 |  | 6
Summary Of Option Activity During The Period | A summary of option activity during 2016 is presented below:
| Shares |  | Weighted-Average Exercise Price
| (In thousands, except per share amounts)
Shares under option at December 31, 2015 | 11,653 |  |  | $32.52
Granted | 2,336 |  |  | 33.18 |
Exercised | (2,031 | ) |  | 30.37 |
Forfeited or expired | (35 | ) |  | 28.89 |
Shares under option at December 31, 2016 | 11,923 |  |  | $33.03
Exercisable at December 31, 2016 | 6,784 |  |  | $29.92
Summary Of Restricted Stock Awards And PSUs Activity During The Period | A summary of Restricted Stock Awards and PSUs activity during 2016 is presented below:
| Restricted Stock Awards and PSUs |  | Weighted Average Grant-Date Fair Value
| (In thousands, except per share amounts)
Non-vested at December 31, 2015 | 4,020 |  |  | $40.99
Granted | 1,818 |  |  | 33.31 |
Vested | (1,010 | ) |  | 31.89 |
Forfeited | (175 | ) |  | 39.00 |
Non-vested at December 31, 2016 | 4,653 |  |  | $40.03

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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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