STOCKHOLDERS' EQUITY STATEMENTS - USD ($) $ in Millions	Total	Common stock and paid-in capital	Retained earnings	Retained earnings Cumulative effect of accounting changes	Accumulated other comprehensive income (loss)	Accumulated other comprehensive income (loss) Cumulative effect of accounting changes
Balance, beginning of period at Jun. 30, 2018		$ 71,223	$ 13,682	$ 677	$ (2,187)	$ (67)
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201601Member
Common stock issued		6,829
Net income	$ 39,240		39,240
Other comprehensive income (loss)	1,914				1,914
Common stock cash dividends			(14,103)
Common stock repurchased		(4,195)	(15,346)
Stock-based compensation expense		4,652
Other, net		11
Balance, end of period at Jun. 30, 2019	$ 102,330	78,520	24,150	0	(340)	0
Cash dividends declared per common share	$ 1.84
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201601Member
Common stock issued		1,343
Net income	$ 44,281		44,281
Other comprehensive income (loss)	3,526				3,526
Common stock cash dividends	(15,483)		(15,483)
Common stock repurchased		(4,599)	(18,382)
Stock-based compensation expense		5,289
Other, net		(1)
Balance, end of period at Jun. 30, 2020	$ 118,304	80,552	34,566	$ (32)	3,186	$ 10
Cash dividends declared per common share	$ 2.04
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201601Member
Common stock issued		1,963
Net income	$ 61,271		61,271
Other comprehensive income (loss)	(1,374)				(1,374)
Common stock cash dividends	(16,876)		(16,871)
Common stock repurchased		(5,539)	(21,879)
Stock-based compensation expense		6,118
Other, net		17
Balance, end of period at Jun. 30, 2021	$ 141,988	$ 83,111	$ 57,055		$ 1,822
Cash dividends declared per common share	$ 2.24