Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
NUMERATOR:
Net loss attributable to common stockholders	$ (231)	$ (159)
DENOMINATOR:
Weighted-average shares outstanding, basic (in shares)	597	594
Weighted-average shares outstanding, diluted (in shares)	597	594
NET LOSS PER SHARE:
Basic (in USD per share)	$ (0.39)	$ (0.27)
Diluted (in USD per share)	$ (0.39)	$ (0.27)
Convertible debt
Antidilutive amounts excluded from calculations:
Potentially dilutive amounts excluded from calculations (in shares)	43	42
Restricted stock units
Antidilutive amounts excluded from calculations:
Potentially dilutive amounts excluded from calculations (in shares)	3	3
Stock warrants
Antidilutive amounts excluded from calculations:
Potentially dilutive amounts excluded from calculations (in shares)	2	1