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Equity - Number of Common Shares Repurchased at the Average Purchase Price (Detail) (USD $)	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Equity [Abstract]
Shares repurchased	6,395,866	8,008,926	441,118
Average price per share	$ 71.20	$ 86.54	$ 56.67

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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