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Share Repurchases (Detail) - USD ($) shares in Millions, $ in Millions	3 Months Ended												12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Share Repurchases [Line Items]
Shares of common stock repurchased													126	150	99
Share Repurchase Program 2016
Share Repurchases [Line Items]
Shares of common stock repurchased			32	29	33	36	57	24	21	34	22	22		150	99
Value of common stock repurchased			$ 4,600	$ 4,000	$ 4,200	$ 3,899	$ 6,100	$ 2,600	$ 2,100	$ 3,100	$ 1,800	$ 1,600		$ 16,799	$ 8,600
Share Repurchase Programs 2016 and 2019
Share Repurchases [Line Items]
Shares of common stock repurchased		37											126
Value of common stock repurchased		$ 6,000											$ 19,688
Share Repurchase Program 2019
Share Repurchases [Line Items]
Shares of common stock repurchased	28
Value of common stock repurchased	$ 5,088

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Share Repurchases [Line Items]

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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.

+ References

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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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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