Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
NUMERATOR:
Net loss	$ (159)	$ (278)
Add: Interest expense	0	0
Net loss attributable to common stockholders	$ (159)	$ (278)
DENOMINATOR:
Weighted-average shares outstanding, Basic (in shares)	594	592
Diluted (in shares)	594	592
NET LOSS PER SHARE:
BASIC (in USD per share)	$ (0.27)	$ (0.47)
Diluted (in USD per share)	$ (0.27)	$ (0.47)
Convertible Debt Securities
Antidilutive Securities Excluded from Computation of Earnings Per Share
Potentially dilutive amounts excluded from calculations (in shares)	42	47
Restricted Stock Units (RSUs)
Antidilutive Securities Excluded from Computation of Earnings Per Share
Potentially dilutive amounts excluded from calculations (in shares)	3	0
Warrant
Antidilutive Securities Excluded from Computation of Earnings Per Share
Potentially dilutive amounts excluded from calculations (in shares)	1	0