Earnings per Share (Unaudited) Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share [Abstract]
Net income (loss) from continuing operations	$ 1,038	$ 1,331	$ 2,942	$ 2,284
Net income attributable to noncontrolling interests	(198)	(248)	(575)	(483)
Undistributed dividends and earnings allocated to participating securities	(4)	(4)	(5)	(4)
Net income attributable to common stockholders	$ 836	$ 1,079	$ 2,362	$ 1,797
Basic weighted-average shares of common stock outstanding	1,447	1,467	1,451	1,465
Add shares issuable upon exercise or vesting of dilutive stock options and restricted stock units (RSUs)	10	16	12	15
Diluted weighted-average shares of common stock outstanding	1,457	1,483	1,463	1,480
Earnings per share, basic (in dollars per share)	$ 0.58	$ 0.74	$ 1.63	$ 1.23
Earnings per share, diluted (in dollars per share)	$ 0.57	$ 0.73	$ 1.61	$ 1.21
Dilutive Securities Excluded from Computation of EPS Amount	0	4	1	7