Earnings per Share (Unaudited) Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Net income (loss) from continuing operations	$ 1,904	$ 953
Net income attributable to noncontrolling interests	377	235
Undistributed earnings allocated to participating securities	(5)	(4)
Net income attributable to common stockholders	$ 1,522	$ 714
Basic weighted-average shares of common stock outstanding	1,455	1,462
Add shares issuable upon exercise or vesting of dilutive stock options and restricted stock units (RSUs)	14	15
Diluted weighted-average shares of common stock outstanding	1,469	1,477
Earnings per share, basic (in dollars per share)	$ 1.05	$ 0.49
Earnings per share, diluted (in dollars per share)	$ 1.04	$ 0.48
Dilutive Securities Excluded from Computation of EPS Amount	2	10