Stockholders' Equity - Changes in Stockholders Equity (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Changes in Stockholders' Equity
Beginning balance	$ 154,526	$ 146,043	$ 134,001	$ 138,245	$ 146,043	$ 138,245	$ 131,402
Common stock repurchased						(6,000)
Other comprehensive income (loss)	293		(2,417)		807	(3,406)
Net income (loss)	6,750		(2,028)		9,922	(5,872)	13,072	$ 11,607
Ending balance	168,602	154,526	131,402	134,001	168,602	131,402	168,602	131,402
Common stock
Changes in Stockholders' Equity
Beginning balance	108	108	107	106	108	106	107
Stock-based compensation and issuance of employee benefit plan stock	0		0		0	1
Ending balance	108	108	107	107	108	107	108	107
Treasury stock
Changes in Stockholders' Equity
Beginning balance	(7,837)	(7,837)	(4,503)	(1,837)	(7,837)	(1,837)	(7,837)
Common stock repurchased	0		(3,334)		0	(6,000)
Ending balance	(7,837)	(7,837)	(7,837)	(4,503)	(7,837)	(7,837)	(7,837)	(7,837)
Additional paid-in capital
Changes in Stockholders' Equity
Beginning balance	79,863	75,066	58,691	55,437	75,066	55,437	63,871
Stock-based compensation and issuance of employee benefit plan stock	7,033		5,180		11,830	8,434
Ending balance	86,896	79,863	63,871	58,691	86,896	63,871	86,896	63,871
Accumulated other comprehensive income (loss)
Changes in Stockholders' Equity
Beginning balance	(3,973)	(4,487)	(2,365)	(1,376)	(4,487)	(1,376)	(4,782)
Other comprehensive income (loss)	293		(2,417)		807	(3,406)
Ending balance	(3,680)	(3,973)	(4,782)	(2,365)	(3,680)	(4,782)	(3,680)	(4,782)
Retained earnings
Changes in Stockholders' Equity
Beginning balance	86,365	83,193	82,071	85,915	83,193	85,915	80,043
Net income (loss)	6,750		(2,028)		9,922	(5,872)
Ending balance	$ 93,115	$ 86,365	$ 80,043	$ 82,071	$ 93,115	$ 80,043	$ 93,115	$ 80,043