Stockholders' Equity - Additional Information (Detail) - USD ($)	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Sep. 20, 2016	Sep. 16, 2013
Share Repurchases [Line Items]
Amount of shares repurchased to settle employee tax withholding related to vesting of stock awards	$ 2,700,000,000	$ 2,100,000,000	$ 1,500,000,000
Share Repurchase Program 2013
Share Repurchases [Line Items]
Amount available for repurchase under the share repurchase program approved by the company's Board of Directors					$ 40,000,000,000
Share Repurchase Program 2016
Share Repurchases [Line Items]
Amount available for repurchase under the share repurchase program approved by the company's Board of Directors				$ 40,000,000,000
Unused amount of share repurchase program	$ 11,400,000,000