BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2022	Jun. 30, 2021
Statement Of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 505	$ 751
Property and equipment, accumulated depreciation	$ 58,053	$ 51,351
Common stock, shares authorized	24,000,000,000	24,000,000,000
Common stock, outstanding	7,483,000,000	7,519,000,000