Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Numerator
Allocation of distributed earnings (cash dividends paid)	$ 2,543	$ 2,466	$ 4,977	$ 2,466
Allocation of undistributed earnings	25,653	21,153	57,759	44,815
Net income	$ 28,196	$ 23,619	$ 62,736	$ 47,281
Denominator
Number of shares used in basic computation (shares)	12,122	12,343	12,153	12,379
Basic net income per share (in dollars per share)	$ 2.33	$ 1.91	$ 5.16	$ 3.82
Numerator
Allocation of total earnings for basic computation	$ 28,196	$ 23,619	$ 62,736	$ 47,281
Net income	$ 28,196	$ 23,619	$ 62,736	$ 47,281
Denominator
Number of shares used in basic computation (shares)	12,122	12,343	12,153	12,379
Weighted-average effect of dilutive securities
Restricted stock units and other contingently issuable shares (shares)	76	152	92	132
Number of shares used in per share computation (shares)	12,198	12,495	12,245	12,511
Diluted net income per share (in dollars per share)	$ 2.31	$ 1.89	$ 5.12	$ 3.78
Class A Common Stock
Numerator
Allocation of distributed earnings (cash dividends paid)	$ 1,222	$ 1,173	$ 2,388	$ 1,173
Allocation of undistributed earnings	12,314	10,046	27,689	21,254
Net income	$ 13,536	$ 11,219	$ 30,077	$ 22,427
Denominator
Number of shares used in basic computation (shares)	5,819	5,862	5,826	5,871
Basic net income per share (in dollars per share)	$ 2.33	$ 1.91	$ 5.16	$ 3.82
Numerator
Allocation of total earnings for basic computation	$ 13,536	$ 11,219	$ 30,077	$ 22,427
Reallocation of total earnings as a result of conversion of Class B to Class A shares	1,981	1,657	4,414	3,315
Reallocation of undistributed earnings	(88)	(140)	(239)	(257)
Net income	$ 15,429	$ 12,736	$ 34,252	$ 25,485
Denominator
Number of shares used in basic computation (shares)	5,819	5,862	5,826	5,871
Weighted-average effect of dilutive securities
Conversion of Class B to Class A common shares outstanding (shares)	852	866	855	868
Number of shares used in per share computation (shares)	6,671	6,728	6,681	6,739
Diluted net income per share (in dollars per share)	$ 2.31	$ 1.89	$ 5.13	$ 3.78
Class A Common Stock | Restricted stock units and other contingently issuable shares
Weighted-average effect of dilutive securities
Restricted stock units and other contingently issuable shares (shares)	0	0	0	0
Class B Common Stock
Numerator
Allocation of distributed earnings (cash dividends paid)	$ 178	$ 173	$ 350	$ 173
Allocation of undistributed earnings	1,803	1,484	4,064	3,142
Net income	$ 1,981	$ 1,657	$ 4,414	$ 3,315
Denominator
Number of shares used in basic computation (shares)	852	866	855	868
Basic net income per share (in dollars per share)	$ 2.33	$ 1.91	$ 5.16	$ 3.82
Numerator
Allocation of total earnings for basic computation	$ 1,981	$ 1,657	$ 4,414	$ 3,315
Reallocation of total earnings as a result of conversion of Class B to Class A shares	0	0	0	0
Reallocation of undistributed earnings	(11)	(18)	(31)	(33)
Net income	$ 1,970	$ 1,639	$ 4,383	$ 3,282
Denominator
Number of shares used in basic computation (shares)	852	866	855	868
Weighted-average effect of dilutive securities
Conversion of Class B to Class A common shares outstanding (shares)	0	0	0	0
Number of shares used in per share computation (shares)	852	866	855	868
Diluted net income per share (in dollars per share)	$ 2.31	$ 1.89	$ 5.13	$ 3.78
Class B Common Stock | Restricted stock units and other contingently issuable shares
Weighted-average effect of dilutive securities
Restricted stock units and other contingently issuable shares (shares)	0	0	0	0
Class C Capital Stock
Numerator
Allocation of distributed earnings (cash dividends paid)	$ 1,143	$ 1,120	$ 2,239	$ 1,120
Allocation of undistributed earnings	11,536	9,623	26,006	20,419
Net income	$ 12,679	$ 10,743	$ 28,245	$ 21,539
Denominator
Number of shares used in basic computation (shares)	5,451	5,615	5,472	5,640
Basic net income per share (in dollars per share)	$ 2.33	$ 1.91	$ 5.16	$ 3.82
Numerator
Allocation of total earnings for basic computation	$ 12,679	$ 10,743	$ 28,245	$ 21,539
Reallocation of total earnings as a result of conversion of Class B to Class A shares	0	0	0	0
Reallocation of undistributed earnings	88	140	239	257
Net income	$ 12,767	$ 10,883	$ 28,484	$ 21,796
Denominator
Number of shares used in basic computation (shares)	5,451	5,615	5,472	5,640
Weighted-average effect of dilutive securities
Conversion of Class B to Class A common shares outstanding (shares)	0	0	0	0
Number of shares used in per share computation (shares)	5,527	5,767	5,564	5,772
Diluted net income per share (in dollars per share)	$ 2.31	$ 1.89	$ 5.12	$ 3.78
Class C Capital Stock | Restricted stock units and other contingently issuable shares
Weighted-average effect of dilutive securities
Restricted stock units and other contingently issuable shares (shares)	76	152	92	132