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	Accumulated other comprehensive income Cumulative effect of accounting changes
Balance, beginning of period at Jun. 30, 2020		$ 80,552	$ 34,566	$ (32)	$ 3,186	$ 10
Accounting Standards Update [Extensible Enumeration]	us-gaap:AccountingStandardsUpdate201601Member
Common stock issued		1,513
Net income	$ 44,813		44,813
Other comprehensive loss	(1,734)				(1,734)
Common stock cash dividends	(12,665)		(12,665)
Common stock repurchased		(4,322)	(15,947)
Stock-based compensation expense		4,547
Other, net		18
Balance, end of period at Mar. 31, 2021	$ 134,505	82,308	50,735		1,462
Cash dividends declared per common share	$ 1.68
Balance, beginning of period at Dec. 31, 2020		81,896	44,973	0	3,367	0
Accounting Standards Update [Extensible Enumeration]	us-gaap:AccountingStandardsUpdate201601Member
Common stock issued		396
Net income	$ 15,457		15,457
Other comprehensive loss	(1,905)				(1,905)
Common stock cash dividends	(4,214)		(4,214)
Common stock repurchased		(1,528)	(5,481)
Stock-based compensation expense		1,525
Other, net		19
Balance, end of period at Mar. 31, 2021	$ 134,505	82,308	50,735		1,462
Cash dividends declared per common share	$ 0.56
Balance, beginning of period at Jun. 30, 2021	$ 141,988	83,111	57,055	0	1,822	0
Accounting Standards Update [Extensible Enumeration]	us-gaap:AccountingStandardsUpdate201601Member
Common stock issued		1,380
Net income	$ 55,998		55,998
Other comprehensive loss	(4,298)				(4,298)
Common stock cash dividends	(13,936)		(13,931)
Common stock repurchased		(4,401)	(19,489)
Stock-based compensation expense		5,505
Other, net		172
Balance, end of period at Mar. 31, 2022	$ 162,924	85,767	79,633		(2,476)
Cash dividends declared per common share	$ 1.86
Balance, beginning of period at Dec. 31, 2021		84,528	75,045	$ 0	437	$ 0
Accounting Standards Update [Extensible Enumeration]	us-gaap:AccountingStandardsUpdate201601Member
Common stock issued		477
Net income	$ 16,728		16,728
Other comprehensive loss	(2,913)				(2,913)
Common stock cash dividends	(4,639)		(4,634)
Common stock repurchased		(1,313)	(7,506)
Stock-based compensation expense		1,906
Other, net		169
Balance, end of period at Mar. 31, 2022	$ 162,924	$ 85,767	$ 79,633		$ (2,476)
Cash dividends declared per common share	$ 0.62