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Share-Based Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2014
Share-Based Compensation Plans |
Schedule of stock option activity |
Stock Options |  | Option Shares |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term (In years) |  | Aggregate Intrinsic Value (In millions) |
Outstanding at January 1, 2012 |  |  | 4,515,560 |  | $ | 47.39 |  |  |  |  |  |  |
Exercised |  |  | (1,018,010 | ) |  | 41.40 |  |  |  |  |  |  |
Expired or forfeited |  |  | (92,050 | ) |  | 49.55 |  |  |  |  |  |  |
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Outstanding at December 31, 2012 |  |  | 3,405,500 |  |  | 49.12 |  |  |  |  |  |  |
Exercised |  |  | (1,437,053 | ) |  | 48.78 |  |  |  |  |  |  |
Expired or forfeited |  |  | (31,206 | ) |  | 51.37 |  |  |  |  |  |  |
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Outstanding at December 31, 2013 |  |  | 1,937,241 |  |  | 49.35 |  |  |  |  |  |  |
Exercised |  |  | (593,204 | ) |  | 48.58 |  |  |  |  |  |  |
Expired or forfeited |  |  | (16,625 | ) |  | 52.13 |  |  |  |  |  |  |
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Outstanding at December 31, 2014 |  |  | 1,327,412 |  | $ | 49.66 |  |  | 2.3 |  | $ | 15.5 |
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Exercisable at December 31, 2014 |  |  | 1,104,999 |  | $ | 48.43 |  |  | 2.2 |  | $ | 14.3 |
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Summary of the status of the Company's non-vested stock options and service and performance RSU changes during the year |
Non-vested Options |  | Shares |  | Weighted Average Grant Date Fair Value |
Non-vested at January 1, 2014 |  |  | 683,725 |  | $ | 24.93 |
Forfeited |  |  | (16,625 | ) |  | 25.15 |
Vested |  |  | (444,687 | ) |  | 23.90 |
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Non-vested at December 31, 2014 |  |  | 222,413 |  | $ | 26.98 |
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Summary of certain information concerning outstanding and exercisable options |
|  |  |  | Options Outstanding |  | Options Exercisable |
Range of Exercise Price |  | Outstanding at December 31, 2014 |  | Weighted Average Remaining Contractual Life in Years |  | Weighted Average Exercise Price |  | Exercisable at December 31, 2014 |  | Weighted Average Exercise Price of Options Exercisable |
$24 - $28 |  |  | 6,199 |  |  | 0.5 |  | $ | 25.40 |  |  | 6,199 |  | $ | 25.40 |
$33 - $38 |  |  | 152,250 |  |  | 1.7 |  |  | 34.26 |  |  | 152,250 |  |  | 34.26 |
$42 - $45 |  |  | 402,250 |  |  | 2.3 |  |  | 42.96 |  |  | 402,250 |  |  | 42.96 |
$55 - $57 |  |  | 724,713 |  |  | 2.5 |  |  | 55.97 |  |  | 502,300 |  |  | 56.08 |
$61 - $67 |  |  | 42,000 |  |  | 3.0 |  |  | 64.16 |  |  | 42,000 |  |  | 64.16 |
$24 - $67 |  |  | 1,327,412 |  |  | 2.3 |  | $ | 49.66 |  |  | 1,104,999 |  | $ | 48.43 |
Summary of the status of the Company's non-vested restricted stock and restricted stock units and changes during the year |
Non-vested Shares |  | Shares |  | Weighted Average Grant Date Fair Value |
Non-vested at January 1, 2014 |  |  | 771,780 |  | $ | 59.06 |
Granted |  |  | 361,210 |  |  | 71.14 |
Forfeited |  |  | (17,150 | ) |  | 63.23 |
Vested |  |  | (269,080 | ) |  | 56.00 |
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Non-vested at December 31, 2014 |  |  | 846,760 |  | $ | 65.10 |
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