Stockholders' Equity - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Sep. 20, 2016	Sep. 16, 2013
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
Number of shares repurchased under the share repurchase program	59,000,000	66,000,000	122,000,000	155,000,000
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
Number of shares repurchased under the share repurchase program			0