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Stock Plans (Tables) | 12 Months Ended
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Sep. 30, 2014
Stock Plans |
Schedule of stock option activity |
|  | Number of Options (in millions) |  | Weighted Average Exercise Price |
Balance, September 30, 2011 |  |  | 2.9 |  | $ | 21.38 |
Granted |  |  | — |  |  | — |
Exercised |  |  | (0.4 | ) |  | 11.40 |
Cancelled |  |  | — |  |  | 26.23 |
Balance, September 30, 2012 |  |  | 2.5 |  |  | 22.81 |
Granted |  |  | — |  |  | — |
Exercised |  |  | (0.8 | ) |  | 18.31 |
Cancelled |  |  | (0.1 | ) |  | 26.83 |
Balance, September 30, 2013 |  |  | 1.6 |  |  | 24.73 |
Granted |  |  | 0.6 |  |  | 31.62 |
Exercised |  |  | (0.5 | ) |  | 23.64 |
Cancelled |  |  | (0.1 | ) |  | 26.87 |
Balance, September 30, 2014 |  |  | 1.6 |  |  | 27.69 |
Exercisable as of September 30, 2012 |  |  | 2.1 |  | $ | 22.07 |
Exercisable as of September 30, 2013 |  |  | 1.4 |  |  | 24.51 |
Exercisable as of September 30, 2014 |  |  | 0.9 |  |  | 25.16 |
Summary of information concerning outstanding and exercisable options |
|  | Options Outstanding |  |  |  | Options Exercisable |
|  | Number Outstanding as of September 30, 2014 (in millions) |  | Weighted Average Remaining Contractual Life |  | Weighted Average Exercise Price |  | Aggregate Intrinsic Value (in millions) |  | Number Exercisable as of September 30, 2014 (in millions) |  | Weighted Average Remaining Contractual Life |  | Weighted Average Exercise Price |
Range of Exercise Prices |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
$21.01 - $23.94 |  |  | 0.4 |  |  | 1.18 |  | $ | 23.46 |  | $ | 4.1 |  |  | 0.4 |  |  | 1.18 |  | $ | 23.46 |
24.45 - 28.67 |  |  | 0.5 |  |  | 2.06 |  |  | 26.24 |  |  | 3.6 |  |  | 0.5 |  |  | 2.06 |  |  | 26.24 |
30.96 - 34.00 |  |  | 0.7 |  |  | 9.17 |  |  | 31.65 |  |  | 0.8 |  |  | — |  |  | 0.66 |  |  | 32.53 |
|  |  | 1.6 |  |  | 4.69 |  |  | 27.69 |  | $ | 8.5 |  |  | 0.9 |  |  | 1.65 |  |  | 25.16 |

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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 number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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