CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Current notes designated at Fair Value Option	$ 18.1	$ 11.9
Non-current notes designated at Fair Value Option	$ 10.7	$ 21.7
Redeemable preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Redeemable preferred stock, designated from authorized preferred stock	179	179
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	99
Redeemable preferred stock, shares outstanding (in shares)	99	99
Convertible preferred stock, shares designated (in shares)	7,536,345	7,535,013
Convertible preferred stock, shares issued (in shares)	1,332	99
Convertible preferred stock, shares outstanding (in shares)	1,332	99
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	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	0
Convertible preferred stock, shares outstanding (in shares)	0	0
Series L Perpetual Preferred Stock
Preferred stock, shares authorized (in shares)	4,475,074	4,475,074
Convertible preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Convertible preferred stock, shares designated (in shares)	121	0
Convertible preferred stock, shares issued (in shares)	121	0
Convertible preferred stock, shares outstanding (in shares)	121	0
Series M Perpetual Preferred Stock
Preferred stock, shares authorized (in shares)	4,475,074	4,475,074
Convertible preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Convertible preferred stock, shares designated (in shares)	260	0
Convertible preferred stock, shares issued (in shares)	260	0
Convertible preferred stock, shares outstanding (in shares)	260	0
Series N Perpetual Preferred Stock
Preferred stock, shares authorized (in shares)	4,475,074	4,475,074
Convertible preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Convertible preferred stock, shares designated (in shares)	951	0
Convertible preferred stock, shares issued (in shares)	951	0
Convertible preferred stock, shares outstanding (in shares)	951	0
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)	3,686,267	528,440
Common stock, shares outstanding (in shares)	3,686,267	528,440
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