Long-Lived Assets, Excluding Financial Instruments and Tax Assets, Classified by Location of Controlling Statutory Company (Detail) - USD ($) $ in Millions	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	$ 128,314	$ 103,293	$ 93,632
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	76,153	60,789	55,252
Ireland
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	13,303	12,734	12,958
Other Countries
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	$ 38,858	$ 29,770	$ 25,422