Organization and Summary of Significant Accounting Policies (Schedule of Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Line Items]
Net income (loss)	$ (25)	$ (3,112)	$ 891
Number of common shares:
Weighted average outstanding (in shares)	789,657,776	573,889,502	539,345,343
Weighted average and potential dilutive outstanding (in shares)	789,657,776	573,889,502	540,382,914
Basic (in dollars per share)	$ (0.03)	$ (5.42)	$ 1.65
Diluted (in dollars per share)	$ (0.03)	$ (5.42)	$ 1.65
Stock Options
Number of common shares:
Effect of share-based compensation (in shares)	0	0	0
Restricted Stock
Number of common shares:
Effect of share-based compensation (in shares)	0	0	361,380
Restricted units
Number of common shares:
Effect of share-based compensation (in shares)	0	0	0
Performance units
Number of common shares:
Effect of share-based compensation (in shares)	0	0	676,191