BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2017	Jun. 30, 2017
Short-term investments, securities loaned	$ 4,774	$ 3,694
Accounts receivable, allowance for doubtful accounts	285	345
Property and equipment, accumulated depreciation	$ 25,523	$ 24,179
Common stock, shares authorized	24,000,000,000	24,000,000,000
Common stock, outstanding	7,720,000,000	7,708,000,000