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Share Repurchases (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended												12 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2009	Sep. 30, 2009	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Share Repurchases [Line Items]
Shares	34	31	39	38	66	30	188	163	130	67	125	58	142	447	380
Amount	$ 1,000	$ 1,000	$ 1,000	$ 1,000	$ 1,631	$ 827	$ 5,000	$ 4,000	$ 3,808	$ 2,000	$ 3,583	$ 1,445	$ 4,000	$ 11,458	$ 10,836

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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- Definition

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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