CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Current notes designated at Fair Value Option	$ 10.2	$ 0.0
Non-current notes designated at Fair Value Option	$ 21.7	$ 31.0
Redeemable preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Redeemable preferred stock, designated from authorized preferred stock	179	0
Redeemable preferred stock, shares authorized (in shares)	10,000.000	10,000.000
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Redeemable preferred stock, shares issued (in shares)	99	0
Redeemable preferred stock, shares outstanding (in shares)	99	0
Convertible preferred stock, shares designated (in shares)	7,535,013	7,534,834
Convertible preferred stock, shares issued (in shares)	99	178
Convertible preferred stock, shares outstanding (in shares)	99	178
Series G convertible preferred stock
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Convertible preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Convertible preferred stock, shares designated (in shares)	137	137
Convertible preferred stock, shares issued (in shares)	0	122
Convertible preferred stock, shares outstanding (in shares)	0	122
Series H convertible preferred stock
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Redeemable preferred stock, shares issued (in shares)		0
Convertible preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Convertible preferred stock, shares designated (in shares)	105	105
Convertible preferred stock, shares issued (in shares)	0	0
Convertible preferred stock, shares outstanding (in shares)	0	0
Series I convertible preferred stock
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Convertible preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Convertible preferred stock, shares designated (in shares)	118	118
Convertible preferred stock, shares issued (in shares)	0	56
Convertible preferred stock, shares outstanding (in shares)	0	56
Common Stock | Common stock - voting
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	298,000,000	298,000,000
Common stock, shares issued (in shares)	273,479,471	73,413,248
Common stock, shares outstanding (in shares)	273,479,471	73,413,248
Common Stock | Common stock - non-voting
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	9	9
Common stock, shares outstanding (in shares)	9	9