Unrecognized cost of unvested share-based compensation awards.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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-Name Accounting Standards Codification

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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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.

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No definition available.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

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-Publisher FASB

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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Amount of stock repurchase plan authorized.

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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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COMMON STOCK (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
COMMON STOCK (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Share Repurchases
Value of share repurchase authorization	$ 190.0
Stock-Based Compensation
Number of shares authorized	15,300,000
Shares available for future grants	4,300,000
Treasury stock, shares	23,291,738	22,884,001
Common Stock [Member]
Share Repurchases
Shares repurchased	1,200,000	1,700,000	2,800,000
Value of shares repurchased	$ 54.8	$ 70.5	$ 92.7
Stock Options [Member]
Stock-Based Compensation
Maximum contractual term	10 years
Total intrinsic value of options exercised	$ 6.3	4.6	1.6
Unrecognized compensation expense	$ 4.1
Unrecognized compensation expense, weighted-average recognition period	2 years 4 months 24 days
Stock Options [Member] \| Minimum [Member]
Stock-Based Compensation
Vesting period	3 years
Stock Options [Member] \| Maximum [Member]
Stock-Based Compensation
Vesting period	4 years
Restricted Stock Units (RSUs) [Member]
Stock-Based Compensation
Unrecognized compensation expense	$ 13.4
Unrecognized compensation expense, weighted-average recognition period	2 years
Total vest date fair value of shares that vested	$ 4.3	$ 5.3	$ 5.4
Restricted Stock Units (RSUs) [Member] \| Minimum [Member]
Stock-Based Compensation
Vesting period	1 year
Restricted Stock Units (RSUs) [Member] \| Maximum [Member]
Stock-Based Compensation
Vesting period	4 years
Performance Shares [Member]
Stock-Based Compensation
Unrecognized compensation expense	$ 10.2
Total vest date fair value of shares that vested	$ 20.5