Earnings Per Share (Schedule of Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss)	$ 1,173	$ (2,675)	$ (609)	$ 80	$ (1,502)	$ (529)
Number of common shares:
Weighted average outstanding (in shares)	1,116,175,758		676,722,999		1,115,456,855	676,057,534
Weighted average and potential dilutive outstanding (in shares)	1,118,244,778		676,722,999		1,115,456,855	676,057,534
Earnings (loss) per common share
Basic (in dollars per share)	$ 1.05		$ (0.90)		$ (1.35)	$ (0.78)
Diluted (in dollars per share)	$ 1.05		$ (0.90)		$ (1.35)	$ (0.78)
Stock options
Number of common shares:
Issued upon assumed exercise of outstanding stock options (in shares)	0		0		0	0
Restricted Common Stock
Number of common shares:
Effect of issuance of non-vested restricted common stock (in shares)	755,235		0		0	0
Restricted units
Number of common shares:
Effect of issuance of non-vested restricted common stock (in shares)	1,226,632		0		0	0
Performance units
Number of common shares:
Effect of issuance of non-vested performance units (in shares)	87,153		0		0	0