Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Denominator
Basic net income per share (in dollars per share)	$ 1.07	$ 1.42	$ 3.53	$ 4.14
Weighted-average effect of dilutive securities
Diluted net income per share (in dollars per share)	$ 1.06	$ 1.40	$ 3.50	$ 4.08
Class A Common Stock
Numerator
Allocation of undistributed earnings	$ 6,393	$ 8,548	$ 21,213	$ 24,867
Denominator
Number of shares used in basic computation (shares)	5,983	6,010	6,004	6,010
Basic net income per share (in dollars per share)	$ 1.07	$ 1.42	$ 3.53	$ 4.14
Numerator
Allocation of undistributed earnings for basic computation	$ 6,393	$ 8,548	$ 21,213	$ 24,867
Reallocation of undistributed earnings as a result of conversion of Class B to Class A shares	946	1,291	3,137	3,776
Reallocation of undistributed earnings	(45)	(156)	(204)	(424)
Allocation of undistributed earnings	$ 7,294	$ 9,683	$ 24,146	$ 28,219
Denominator
Number of shares used in basic computation (shares)	5,983	6,010	6,004	6,010
Weighted-average effect of dilutive securities
Conversion of Class B to Class A common shares outstanding (shares)	885	908	888	912
Restricted stock units and other contingently issuable shares (shares)			0	0
Number of shares used in per share computation (shares)	6,868	6,918	6,892	6,922
Diluted net income per share (in dollars per share)	$ 1.06	$ 1.40	$ 3.50	$ 4.08
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
Class B Common Stock
Numerator
Allocation of undistributed earnings	$ 946	$ 1,291	$ 3,137	$ 3,776
Denominator
Number of shares used in basic computation (shares)	885	908	888	912
Basic net income per share (in dollars per share)	$ 1.07	$ 1.42	$ 3.53	$ 4.14
Numerator
Allocation of undistributed earnings for basic computation	$ 946	$ 1,291	$ 3,137	$ 3,776
Reallocation of undistributed earnings as a result of conversion of Class B to Class A shares	0	0	0	0
Reallocation of undistributed earnings	(6)	(20)	(26)	(56)
Allocation of undistributed earnings	$ 940	$ 1,271	$ 3,111	$ 3,720
Denominator
Number of shares used in basic computation (shares)	885	908	888	912
Weighted-average effect of dilutive securities
Conversion of Class B to Class A common shares outstanding (shares)	0	0	0	0
Restricted stock units and other contingently issuable shares (shares)			0	0
Number of shares used in per share computation (shares)	885	908	888	912
Diluted net income per share (in dollars per share)	$ 1.06	$ 1.40	$ 3.50	$ 4.08
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
Class C Capital Stock
Numerator
Allocation of undistributed earnings	$ 6,571	$ 9,097	$ 21,998	$ 26,748
Denominator
Number of shares used in basic computation (shares)	6,150	6,397	6,226	6,464
Basic net income per share (in dollars per share)	$ 1.07	$ 1.42	$ 3.53	$ 4.14
Numerator
Allocation of undistributed earnings for basic computation	$ 6,571	$ 9,097	$ 21,998	$ 26,748
Reallocation of undistributed earnings as a result of conversion of Class B to Class A shares	0	0	0	0
Reallocation of undistributed earnings	45	156	204	424
Allocation of undistributed earnings	$ 6,616	$ 9,253	$ 22,202	$ 27,172
Denominator
Number of shares used in basic computation (shares)	6,150	6,397	6,226	6,464
Weighted-average effect of dilutive securities
Conversion of Class B to Class A common shares outstanding (shares)	0	0	0	0
Restricted stock units and other contingently issuable shares (shares)			111	202
Number of shares used in per share computation (shares)	6,229	6,612	6,337	6,666
Diluted net income per share (in dollars per share)	$ 1.06	$ 1.40	$ 3.50	$ 4.08
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)	79	215