Share-Based Compensation and Savings Plans (Summary of Stock Option Activity) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
Jun. 30, 2012	Jun. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Stock Options Outstanding, Beginning Balance	23	24
Stock Options Outstanding, Granted	2	4
Stock Options Outstanding, Exercised	(2)	(3)
Stock Options Outstanding, Canceled and forfeited	(2)	(2)
Stock Options Outstanding, Ending Balance	21	23
Stock Options Outstanding, Exercisable at June 30, 2012	15
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price Per Common Share, Beginning Balance	$ 37.02	$ 37.88
Weighted Average Exercise Price Per Common Share, Granted	$ 41.58	$ 31.07
Weighted Average Exercise Price Per Common Share, Exercised	$ 30.26	$ 30.16
Weighted Average Exercise Price Per Common Share, Canceled and forfeited	$ 47.19	$ 43.34
Weighted Average Exercise Price Per Common Share, Ending Balance	$ 37.29	$ 37.02
Weighted Average Exercise Price Per Common Share, Exercisable at June 30, 2012	$ 38.80

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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

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-Name Accounting Standards Codification

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Net number of share options (or share units) granted during the period.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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