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Stock-Based Compensation (Tables) | 3 Months Ended
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Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Share-based Compensation, Activity [Table Text Block] | A summary of the stock-based awards granted during the three month periods ended December 31, 2017 and 2016 is presented below:
| Three Months Ended December 31,
| 2017 |  | 2016
| Number Granted |  | Weighted Average Grant Date Fair Value |  | Number Granted |  | Weighted Average Grant Date Fair Value
Stock options | 1,355,595 |  |  | $ | 7.05 |  |  | 2,830,826 |  |  | $ | 7.81 |
Stock appreciation rights | — |  |  | — |  |  | 15,693 |  |  | 8.28 |
Restricted stock/units | 2,051,817 |  |  | 37.36 |  |  | 1,512,544 |  |  | 41.74 |
Performance shares | 496,478 |  |  | 36.31 |  |  | 846,725 |  |  | 48.40 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
| Three Months Ended December 31,
| 2017 |  | 2016
Expected life of option (years) | 6.5 |  | 4.75 & 6.5
Risk-free interest rate | 2.28% |  | 1.23% - 1.48%
Expected volatility of the Company’s stock | 23.7% |  | 24.6%
Expected dividend yield on the Company’s stock | 2.78% |  | 2.21%
Schedule of share-based payment award, performance share, valuation assumptions [Table Text Block] |
| Three Months Ended December 31,
| 2017 |  | 2016
Risk-free interest rate | 1.92% |  | 1.40%
Expected volatility of the Company’s stock | 21.7% |  | 21.0%

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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 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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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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