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Stock-Based Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2016
Stock-Based Compensation Plans |
Schedule of stock option activity |
|  |  |  |  |  |  | Weighted Average |  |  |
|  |  |  |  |  |  | Remaining |  | Aggregate
|  | Option |  | Weighted Average |  | Contractual Term |  | Intrinsic Value
Stock Options |  | Shares |  | Exercise Price |  | (in years) |  | (in millions)
Outstanding at January 1, 2014 |  | 1,937,241 |  | $ | 49.35 |  |  |  |  |
Exercised |  | (593,204) |  |  | 48.58 |  |  |  |  |
Expired or forfeited |  | (16,625) |  |  | 52.13 |  |  |  |  |
Outstanding at December 31, 2014 |  | 1,327,412 |  |  | 49.66 |  |  |  |  |
Exercised |  | (390,606) |  |  | 48.19 |  |  |  |  |
Expired or forfeited |  | (2,481) |  |  | 51.96 |  |  |  |  |
Outstanding at December 31, 2015 |  | 934,325 |  |  | 50.26 |  |  |  |  |
Exercised |  | (753,645) |  |  | 49.70 |  |  |  |  |
Outstanding at December 31, 2016 |  | 180,680 |  | $ | 52.61 |  | 1.3 |  | $ | 4.9
Exercisable at December 31, 2016 |  | 180,680 |  | $ | 52.61 |  | 1.3 |  | $ | 4.9
Summary of certain information concerning outstanding and exercisable options |
|  |  |  | Options Outstanding |  | Options Exercisable
|  |  |  | Weighted Average |  |  |  |  |  |  | Weighted Average
|  |  |  | Remaining |  | Weighted |  |  |  | Exercise
Range of |  | Outstanding at |  | Contractual Life |  | Average |  | Exercisable at |  | Price of Options
Exercise Price |  | December 31, 2016 |  | in Years |  | Exercise Price |  | December 31, 2016 |  | Exercisable
$38 |  | 12,000 |  | 2.4 |  | $ | 38.00 |  | 12,000 |  | $ | 38.00
$42 - $45 |  | 45,225 |  | 1.4 |  |  | 43.68 |  | 45,225 |  |  | 43.68
$55 - $56 |  | 99,455 |  | 1.1 |  |  | 55.73 |  | 99,455 |  |  | 55.73
$61 - $67 |  | 24,000 |  | 0.9 |  |  | 63.81 |  | 24,000 |  |  | 63.81
$38 - $67 |  | 180,680 |  | 1.3 |  | $ | 52.61 |  | 180,680 |  | $ | 52.61
Summary of the status of the Company's unvested restricted stock grants and restricted stock units and changes during the year |
|  |  |  | Weighted |
|  |  |  | Average Grant |
Unvested Shares |  | Shares |  | Date Fair Value |
Unvested at January 1, 2016 |  | 900,410 |  | $ | 63.26 |
Granted |  | 524,746 |  |  | 69.20 |
Forfeited |  | (93,814) |  |  | 67.90 |
Vested |  | (345,802) |  |  | 67.96 |
Unvested at December 31, 2016 |  | 985,540 |  | $ | 64.34 |

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 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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