Loss per Share - Antidilutive Securities (Details) - shares shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share
Common stock outstanding that have been excluded from the computation of diluted loss per share (in shares)	39	44	39	44
Unvested restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share
Common stock outstanding that have been excluded from the computation of diluted loss per share (in shares)	3	8	3	8
Shares related to convertible debt instruments
Antidilutive Securities Excluded from Computation of Earnings Per Share
Common stock outstanding that have been excluded from the computation of diluted loss per share (in shares)	36	36	36	36