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																12 Months Ended
	Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2017		Sep. 30, 2017		Jun. 30, 2017		Mar. 31, 2017	[1]	Dec. 31, 2016	[1]	Sep. 30, 2016	[1]	Jun. 30, 2018		Jun. 30, 2017		Jun. 30, 2016	Jul. 01, 2016
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Revenue	$ 30,085		$ 26,819		$ 28,918		$ 24,538		$ 25,605	[1]	$ 23,212		$ 25,826		$ 21,928		$ 110,360		$ 96,571	[1]	$ 91,154
Provision for income taxes																	19,903		4,412		5,100
Net income	$ 8,873	[2]	$ 7,424	[2]	$ (6,302)	[2]	$ 6,576	[2]	$ 8,069	[1],[3]	$ 5,486		$ 6,267		$ 5,667		$ 16,571	[2]	$ 25,489	[1],[3]	$ 20,539
Diluted earnings per share	$ 1.14	[4]	$ 0.95	[4]	$ (0.82)	[4]	$ 0.84	[4]	$ 1.03	[1],[3]	$ 0.70		$ 0.80		$ 0.72		$ 2.13	[4]	$ 3.25	[1],[3]	$ 2.56
Balance Sheets
Accounts receivable, net of allowance for doubtful accounts	$ 26,481								$ 22,431								$ 26,481		$ 22,431
Operating lease right-of-use assets	6,686								6,555								6,686		6,555
Other current and long-term assets									11,179										11,179
Unearned revenue	32,720								26,656								32,720		26,656			$ 22,200
Deferred income taxes	541								5,734								541		5,734
Operating lease liabilities	5,568								5,372								5,568		5,372
Other current and long-term liabilities									24,621										24,621
Stockholders' equity	$ 82,718								87,711								$ 82,718		87,711		$ 83,090
As Previously Reported
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Revenue																			89,950		85,320
Provision for income taxes																			1,945		2,953
Net income																			$ 21,204		$ 16,798
Diluted earnings per share																			$ 2.71		$ 2.10
Balance Sheets
Accounts receivable, net of allowance for doubtful accounts									19,792										$ 19,792
Operating lease right-of-use assets									0										0
Other current and long-term assets									11,147										11,147
Unearned revenue									44,479										44,479
Deferred income taxes									531										531
Operating lease liabilities									0										0
Other current and long-term liabilities									23,464										23,464
Stockholders' equity									72,394										72,394
New Revenue Standard Adjustment | Restatement Adjustment
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Revenue																			6,621		$ 5,834
Provision for income taxes																			2,467		2,147
Net income																			$ 4,285		$ 3,741
Diluted earnings per share																			$ 0.54		$ 0.46
Balance Sheets
Accounts receivable, net of allowance for doubtful accounts									2,639										$ 2,639
Operating lease right-of-use assets									0										0
Other current and long-term assets									32										32
Unearned revenue									(17,823)										(17,823)
Deferred income taxes									5,203										5,203
Operating lease liabilities									0										0
Other current and long-term liabilities									(26)										(26)
Stockholders' equity									15,317										15,317
New Lease Standard Adjustment | Restatement Adjustment
Balance Sheets
Accounts receivable, net of allowance for doubtful accounts									0										0
Operating lease right-of-use assets									6,555										6,555
Other current and long-term assets									0										0
Unearned revenue									0										0
Deferred income taxes									0										0
Operating lease liabilities									5,372										5,372
Other current and long-term liabilities									1,183										1,183
Stockholders' equity									$ 0										$ 0

[1] On December 8, 2016, we acquired LinkedIn Corporation. LinkedIn has been included in our consolidated results of operations starting on the acquisition date.

[2] Reflects the net charge (benefit) related to the TCJA of $13.8 billion for the second quarter, $(104) million for the fourth quarter, and $13.7 billion for fiscal year 2018.

[3] Includes $306 million of employee severance expenses primarily related to our sales and marketing restructuring plan, which decreased operating income, net income, and diluted EPS by $306 million, $243 million, and $0.04, respectively.

[4] Reflects the net charge (benefit) related to the TCJA, which decreased (increased) diluted EPS $1.78 for the second quarter, $(0.01) for the fourth quarter, and $1.75 for fiscal year 2018.