Impacts of Adoption of Standards Related to Revenue Recognition and Leases to Previously Reported Results - (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Jun. 30, 2017	Jul. 01, 2016
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Revenue	$ 26,819	$ 23,212	$ 80,275	$ 70,966
Provision for income taxes	1,217	1,608	18,096	4,523
Net income	$ 7,424	$ 5,486	$ 7,698	$ 17,420
Diluted earnings per share	$ 0.95	$ 0.70	$ 0.99	$ 2.22
Balance Sheets
Accounts receivable, net of allowance for doubtful accounts	$ 17,208		$ 17,208		$ 22,431
Operating lease right-of-use assets	6,859		6,859		6,555
Other current and long-term assets					11,179
Unearned revenue	23,955		23,955		26,656	$ 22,200
Deferred income taxes	2,417		2,417		5,734
Operating lease liabilities	5,751		5,751		5,372
Other current and long-term liabilities					24,621
Stockholders' equity	$ 79,239	$ 83,491	$ 79,239	$ 83,491	87,711
As Previously Reported
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Revenue		22,090		66,633
Provision for income taxes		1,115		2,913
Net income		$ 4,801		$ 14,691
Diluted earnings per share		$ 0.61		$ 1.87
Balance Sheets
Accounts receivable, net of allowance for doubtful accounts					19,792
Operating lease right-of-use assets					0
Other current and long-term assets					11,147
Unearned revenue					44,479
Deferred income taxes					531
Operating lease liabilities					0
Other current and long-term liabilities					23,464
Stockholders' equity					72,394
New Revenue Standard Adjustment | Restatement Adjustment
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Revenue		$ 1,122		$ 4,333
Provision for income taxes		493		1,610
Net income		$ 685		$ 2,729
Diluted earnings per share		$ 0.09		$ 0.35
Balance Sheets
Accounts receivable, net of allowance for doubtful accounts					2,639
Operating lease right-of-use assets					0
Other current and long-term assets					32
Unearned revenue					(17,823)
Deferred income taxes					5,203
Operating lease liabilities					0
Other current and long-term liabilities					(26)
Stockholders' equity					15,317
New Lease Standard Adjustment | Restatement Adjustment
Balance Sheets
Accounts receivable, net of allowance for doubtful accounts					0
Operating lease right-of-use assets					6,555
Other current and long-term assets					0
Unearned revenue					0
Deferred income taxes					0
Operating lease liabilities					5,372
Other current and long-term liabilities					1,183
Stockholders' equity					$ 0