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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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

-Publisher FASB

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- Definition

Per basic and diluted share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation and gain (loss) from the disposal of the discontinued operation, when the per share amount is the same.

+ References

No definition available.

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Amount of stock repurchase plan authorized.

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No definition available.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 30

-Section 45

-Paragraph 1

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- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

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-Name Accounting Standards Codification

-Topic 505

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-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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- Definition

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

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-Section S99

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-Subparagraph (SX 210.3-04)

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Earnings per Share - Narrative (Details) - USD ($) $ / shares in Units, shares in Thousands	1 Months Ended	7 Months Ended	12 Months Ended
	Jun. 30, 2015	Jul. 30, 2015	May. 31, 2015	May. 31, 2014	May. 31, 2013	Jan. 13, 2015	Jul. 30, 2013	Oct. 18, 2011
Earnings Per Share, Basic and Diluted [Line Items]
Basic and diluted earnings (loss) per share, discontinued operations (dollars per share)			$ 0.19	$ 0.00	$ (0.01)
Options granted excluded from the computation of diluted earnings per share (shares)			600	700	700
Total purchase price of shares repurchased			$ 551,970,000	$ 370,599,000	$ 215,681,000
Employee Payroll Taxes Due on Restricted Stock Awards
Earnings Per Share, Basic and Diluted [Line Items]
Stock purchased under share buyback			200	200
Stock purchased under share buyback, average price per share			$ 64.58	$ 50.45
Total purchase price of shares repurchased			$ 14,400,000	$ 8,600,000
October 18, 2011
Earnings Per Share, Basic and Diluted [Line Items]
Share buyback program, authorized amount								$ 500,000,000
Stock purchased under share buyback			0	3,324
Stock purchased under share buyback, average price per share			$ 0.00	$ 48.87
Total purchase price of shares repurchased			$ 0	$ 162,460,000
July 30, 2013
Earnings Per Share, Basic and Diluted [Line Items]
Share buyback program, authorized amount							$ 500,000,000.0
Stock purchased under share buyback			3,981	3,341
Stock purchased under share buyback, average price per share			$ 75.49	$ 59.72
Total purchase price of shares repurchased			$ 300,500,000	$ 199,500,000
January 13, 2015
Earnings Per Share, Basic and Diluted [Line Items]
Share buyback program, authorized amount						$ 500,000,000.0
Stock purchased under share buyback			2,870	0
Stock purchased under share buyback, average price per share			$ 82.60	$ 0.00
Total purchase price of shares repurchased			$ 237,072,000	$ 0
Subsequent Event \| January 13, 2015
Earnings Per Share, Basic and Diluted [Line Items]
Stock purchased under share buyback	1,500	4,400
Stock purchased under share buyback, average price per share	$ 86.08	$ 83.82
Total purchase price of shares repurchased	$ 132,900,000	$ 370,000,000