Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Numerator
Allocation of distributed earnings (cash dividends paid)	$ 2,455	$ 0	$ 4,921	$ 0
Allocation of undistributed earnings	23,846	19,689	68,661	53,108
Net income	$ 26,301	$ 19,689	$ 73,582	$ 53,108
Denominator
Number of shares used in basic computation (shares)	12,290	12,581	12,349	12,677
Basic net income per share (in dollars per share)	$ 2.14	$ 1.56	$ 5.96	$ 4.19
Numerator
Allocation of total earnings for basic computation	$ 26,301	$ 19,689	$ 73,582	$ 53,108
Net income	$ 26,301	$ 19,689	$ 73,582	$ 53,108
Denominator
Number of shares used in basic computation (shares)	12,290	12,581	12,349	12,677
Weighted-average effect of dilutive securities
Restricted stock units and other contingently issuable shares (shares)	129	115	131	84
Number of shares used in per share computation (shares)	12,419	12,696	12,480	12,761
Diluted net income per share (in dollars per share)	$ 2.12	$ 1.55	$ 5.90	$ 4.16
Class A Common Stock
Numerator
Allocation of distributed earnings (cash dividends paid)	$ 1,170	$ 0	$ 2,343	$ 0
Allocation of undistributed earnings	11,351	9,271	32,599	24,851
Net income	$ 12,521	$ 9,271	$ 34,942	$ 24,851
Denominator
Number of shares used in basic computation (shares)	5,850	5,924	5,863	5,932
Basic net income per share (in dollars per share)	$ 2.14	$ 1.56	$ 5.96	$ 4.19
Numerator
Allocation of total earnings for basic computation	$ 12,521	$ 9,271	$ 34,942	$ 24,851
Reallocation of total earnings as a result of conversion of Class B to Class A shares	1,851	1,369	5,167	3,682
Reallocation of undistributed earnings	(135)	(96)	(394)	(187)
Net income	$ 14,237	$ 10,544	$ 39,715	$ 28,346
Denominator
Number of shares used in basic computation (shares)	5,850	5,924	5,863	5,932
Weighted-average effect of dilutive securities
Conversion of Class B to Class A common shares outstanding (shares)	865	875	867	879
Number of shares used in per share computation (shares)	6,715	6,799	6,730	6,811
Diluted net income per share (in dollars per share)	$ 2.12	$ 1.55	$ 5.90	$ 4.16
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)	$ 173	$ 0	$ 346	$ 0
Allocation of undistributed earnings	1,678	1,369	4,821	3,682
Net income	$ 1,851	$ 1,369	$ 5,167	$ 3,682
Denominator
Number of shares used in basic computation (shares)	865	875	867	879
Basic net income per share (in dollars per share)	$ 2.14	$ 1.56	$ 5.96	$ 4.19
Numerator
Allocation of total earnings for basic computation	$ 1,851	$ 1,369	$ 5,167	$ 3,682
Reallocation of total earnings as a result of conversion of Class B to Class A shares	0	0	0	0
Reallocation of undistributed earnings	(17)	(12)	(51)	(24)
Net income	$ 1,834	$ 1,357	$ 5,116	$ 3,658
Denominator
Number of shares used in basic computation (shares)	865	875	867	879
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)	865	875	867	879
Diluted net income per share (in dollars per share)	$ 2.12	$ 1.55	$ 5.90	$ 4.16
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)	$ 1,112	$ 0	$ 2,232	$ 0
Allocation of undistributed earnings	10,817	9,049	31,241	24,575
Net income	$ 11,929	$ 9,049	$ 33,473	$ 24,575
Denominator
Number of shares used in basic computation (shares)	5,575	5,782	5,619	5,866
Basic net income per share (in dollars per share)	$ 2.14	$ 1.56	$ 5.96	$ 4.19
Numerator
Allocation of total earnings for basic computation	$ 11,929	$ 9,049	$ 33,473	$ 24,575
Reallocation of total earnings as a result of conversion of Class B to Class A shares	0	0	0	0
Reallocation of undistributed earnings	135	96	394	187
Net income	$ 12,064	$ 9,145	$ 33,867	$ 24,762
Denominator
Number of shares used in basic computation (shares)	5,575	5,782	5,619	5,866
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)	5,704	5,897	5,750	5,950
Diluted net income per share (in dollars per share)	$ 2.12	$ 1.55	$ 5.89	$ 4.16
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)	129	115	131	84