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Note 9 - Share-based Compensation and Other Benefit Plans (Tables) | 12 Months Ended
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Jun. 30, 2017
Notes Tables |
Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  | Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Avg. Contractual Life (Yrs.) |  |  | Aggregate Intrinsic Value (millions) |
Outstanding at June 30, 2014 |  |  | 811 |  |  |  | 72.11 |  |  |  |  |  |  |  |  |
Granted |  |  | 600 |  |  |  | 93.98 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (133 | ) |  |  | 92.85 |  |  |  |  |  |  |  |  |
Exercised |  |  | (141 | ) |  |  | 69.31 |  |  |  |  |  |  |  |  |
Outstanding at June 30, 2015 |  |  | 1,137 |  |  | $ | 81.57 |  |  |  |  |  |  |  |  |
Granted |  |  | 805 |  |  |  | 105.16 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (54 | ) |  |  | 99.68 |  |  |  |  |  |  |  |  |
Exercised |  |  | (69 | ) |  |  | 69.82 |  |  |  |  |  |  |  |  |
Outstanding at June 30, 2016 |  |  | 1,819 |  |  | $ | 91.91 |  |  |  |  |  |  |  |  |
Granted |  |  | 1,135 |  |  |  | 107.42 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (70 | ) |  |  | 99.11 |  |  |  |  |  |  |  |  |
Exercised |  |  | (63 | ) |  |  | 71.81 |  |  |  |  |  |  |  |  |
Outstanding at June 30, 2017 |  |  | 2,821 |  |  | $ | 98.42 |  |  |  | 5.1 |  |  | $ | 53.8 |
Exercisable at June 30: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2015 |  |  | 547 |  |  |  | 72.72 |  |  |  |  |  |  |  |  |
2016 |  |  | 596 |  |  |  | 75.74 |  |  |  |  |  |  |  |  |
2017 |  |  | 843 |  |  |  | 82.93 |  |  |  | 4.0 |  |  | $ | 29.1 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | Year Ended June 30, |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Dividend yield |  |  | 1.2% |  |  |  |  | 1.2% |  |  |  |  | 1.3% |  |
Expected volatility |  | 21% | - | 24% |  |  | 20% | - | 23% |  |  | 18% | - | 21% |
Risk-free interest rates |  | 1.0% | - | 1.9% |  |  | 1.2% | - | 1.9% |  |  | 1.3% | - | 2.2% |
Expected lives (years) |  |  | 5 |  |  |  |  | 5 |  |  |  |  | 5 |  |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=96867065&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 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: 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=96867065&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=96867065&loc=d3e5070-113901 + Details
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