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Stock-Based Compensation (Tables) | 3 Months Ended
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Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Share-based Payment Arrangement, Activity [Table Text Block] | A summary of the stock-based awards granted during the three month periods ended December 31, 2020 and 2019 is presented below:
| Three Months Ended December 31, |  |
| 2020 |  |  |  | 2019 |  |
| Number Granted |  | Weighted Average Grant Date Fair Value |  |  |  | Number Granted |  | Weighted Average Grant Date Fair Value |  |
Stock options | 967,932 |  |  | $ | 9.36 |  |  |  |  | 1,302,729 |  |  | $ | 7.29 |  |  |
Restricted stock/units | 1,599,552 |  |  | 45.61 |  |  |  |  | 1,695,130 |  |  | 41.78 |  |  |
Performance shares | 410,934 |  |  | 50.53 |  |  |  |  | 464,234 |  |  | 42.53 |  |  |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
| Three Months Ended December 31,
| 2020 |  | 2019
Expected life of option (years) | 6.5 |  | 6.5
Risk-free interest rate | 0.6% |  | 1.67%
Expected volatility of the Company’s stock | 27.6% |  | 22.4%
Expected dividend yield on the Company’s stock | 2.28% |  | 2.49%
Schedule of share-based payment award, performance share, valuation assumptions [Table Text Block] |
| Three Months Ended December 31,
| 2020 |  | 2019
Risk-free interest rate | 0.20% |  | 1.60%
Expected volatility of the Company’s stock | 30.9% |  | 21.8%

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- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&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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