Stockholders' Equity - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Sep. 18, 2019	Sep. 20, 2016
Share Repurchases [Line Items]
Amount of shares repurchased to settle employee tax withholding related to vesting of stock awards	$ 1,100,000,000	$ 854,000,000	$ 2,600,000,000	$ 2,300,000,000
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						$ 40,000,000,000.0
Share Repurchase Program 2019
Share Repurchases [Line Items]
Amount available for repurchase under the share repurchase program approved by the company's Board of Directors					$ 40,000,000,000.0
Unused amount of share repurchase program	$ 36,800,000,000		$ 36,800,000,000