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Equity Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] |
|  | Number of Options |  | Weighted-Average Exercise Price |  | Aggregate Intrinsic Value (in millions)
Outstanding December 31, 2014 |  | 2,978,733 |  |  | $ | 55.41 |  |  |
Granted |  | 506,344 |  |  | $ | 91.65 |  |  |
Exercised |  | (652,015 | ) |  | $ | 51.43 |  |  |
Forfeited |  | (7,622 | ) |  | $ | 57.29 |  |  |
Outstanding December 31, 2015 |  | 2,825,440 |  |  | $ | 62.82 |  |  | $ | 81.5 |
Options exercisable |  | 2,087,712 |  |  | $ | 56.12 |  |  | $ | 74.2 |
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] |
|  | Options Outstanding |  | Options Exercisable
Range of Exercise Prices |  | Number Outstanding as of 12/31/2015 |  | Weighted-Average Remaining Contractual Life (years) |  | Weighted- Average Exercise Price |  | Number Exercisable as of 12/31/2015 |  | Weighted-Average Exercise Price
$25.00 - $44.99 |  | 208,347 |  |  | 3.0 |  | $ | 32.20 |  |  | 208,347 |  |  | $ | 32.20 |
$45.00 - $54.99 |  | 267,249 |  |  | 3.8 |  | $ | 47.11 |  |  | 267,249 |  |  | $ | 47.11 |
$55.00 + |  | 2,349,844 |  |  | 6.6 |  | $ | 67.32 |  |  | 1,612,116 |  |  | $ | 60.71 |
Totals |  | 2,825,440 |  |  | 6.1 |  | $ | 62.82 |  |  | 2,087,712 |  |  | $ | 56.12 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] | The following table presents the weighted average assumptions used to determine the fair value of stock options issued:
For the years ended December 31, |  | 2015 |  | 2014 |  | 2013
Dividend yield |  | 1.47 | % |  | 1.53 | % |  | 1.63 | %
Risk-free rate of return |  | 2.04 | % |  | 2.27 | % |  | 1.36 | %
Expected volatility |  | 35.0 | % |  | 35.7 | % |  | 35.4 | %
Expected life (years) |  | 7.0 |  |  | 7.0 |  |  | 6.8 |
Weighted average exercise price of stock options granted |  | $ | 91.65 |  |  | $ | 78.48 |  |  | $ | 58.77 |
Weighted average fair value of stock options granted |  | $ | 30.05 |  |  | $ | 26.76 |  |  | $ | 18.58 |
Schedule of Share-based Compensation, Activity [Table Text Block] | The following table presents a summary of Performance Share and Restricted Stock Unit activity:
| Performance Contingent Units |  | Restricted Stock Units
Outstanding December 31, 2014 | 692,663 |  |  | 36,065 |
Granted | 185,783 |  |  | 37,078 |
Paid | (192,725 | ) |  | — |
Forfeited | (54,399 | ) |  | (2,256 | )
Outstanding December 31, 2015 | 631,322 |  |  | 70,887 |

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- Definition Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value. + References No definition available. + Details
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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 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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