Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended																12 Months Ended
	Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2017		Sep. 30, 2017		Jun. 30, 2017	[3]	Mar. 31, 2017	[3]	Dec. 31, 2016	[3]	Sep. 30, 2016	[3]	Jun. 30, 2018		Jun. 30, 2017		Jun. 30, 2016
Earnings Per Share Basic And Diluted [Abstract]
Net income available for common shareholders (A)	$ 8,873	[1]	$ 7,424	[1]	$ (6,302)	[1]	$ 6,576	[1]	$ 8,069	[2]	$ 5,486		$ 6,267		$ 5,667		$ 16,571	[1]	$ 25,489	[2],[3]	$ 20,539
Weighted average outstanding shares of common stock (B)																	7,700		7,746		7,925
Dilutive effect of stock-based awards																	94		86		88
Common stock and common stock equivalents (C)																	7,794		7,832		8,013
Earnings Per Share
Basic (A/B)	$ 1.15		$ 0.96		$ (0.82)		$ 0.85		$ 1.05		$ 0.71		$ 0.81		$ 0.73		$ 2.15		$ 3.29	[3]	$ 2.59
Diluted (A/C)	$ 1.14	[4]	$ 0.95	[4]	$ (0.82)	[4]	$ 0.84	[4]	$ 1.03	[2]	$ 0.70		$ 0.80		$ 0.72		$ 2.13	[4]	$ 3.25	[2],[3]	$ 2.56

[1] 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.

[2] 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.

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

[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.