Major Classes of Assets and Liabilities Allocated Purchase Price (Detail) - USD ($) $ in Millions	Jun. 30, 2021	Mar. 09, 2021	Jun. 30, 2020	Jun. 30, 2019	Oct. 25, 2018
Business Acquisition [Line Items]
Goodwill	$ 49,711		$ 43,351	$ 42,026
ZeniMax Media Inc.
Business Acquisition [Line Items]
Cash and cash equivalents		$ 768
Goodwill	5,500	5,469
Intangible assets	$ 2,000	1,968
Other assets		139
Other liabilities		(223)
Total		$ 8,121
GitHub, Inc.
Business Acquisition [Line Items]
Cash, cash equivalents, and short-term investments					$ 234
Goodwill					5,497
Intangible assets					1,267
Other assets					143
Other liabilities					(217)
Total					$ 6,924