Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
NUMERATOR:
Net loss attributable to common stockholders	$ (149)	$ (231)
Net loss attributable to common stockholders	$ (149)	$ (231)
DENOMINATOR:
Weighted-average shares outstanding, basic (in shares)	584	597
Weighted-average shares outstanding, diluted (in shares)	584	597
NET LOSS PER SHARE:
Basic (in USD per share)	$ (0.26)	$ (0.39)
Diluted (in USD per share)	$ (0.26)	$ (0.39)
Convertible debt
Antidilutive amounts excluded from calculations:
Potentially dilutive amounts excluded from calculations (in shares)	44	43
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)	0	2