STOCK-BASED COMPENSATION - Holdco Unit Activity (Details) - $ / shares	1 Months Ended	3 Months Ended		6 Months Ended
	Feb. 10, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Class A Holdco Units
Shares
Unvested - beginning of period (in shares)	19,632,883	18,922,922		19,632,883
Granted (in shares)		0		0
Vested (in shares)		(2,686,449)		(3,396,410)
Forfeited/Cancelled (in shares)		(1,585,678)		(1,585,678)
Unvested - end of period (in shares)		14,650,795		14,650,795
Weighted Average Grant Date Fair Value
Unvested - beginning of period (in usd per share)	$ 0.50	$ 0.49		$ 0.50
Granted (in usd per share)		0		0
Vested (in usd per share)		0.47		0.54
Forfeited/Cancelled (in usd per share)		0.51		0.51
Unvested - end of period (in usd per share)		$ 0.50		$ 0.50
Class Z, Class Y, Class X, Class W and Class V Common Units
Shares
Unvested - beginning of period (in shares)	100,679,480		89,541,592	100,679,480
Granted (in shares)			1,227,342,174		1,227,342,174
Vested (in shares)			(505,480,737)		(506,610,385)
Forfeited/Cancelled (in shares)			(65,662,679)		(75,670,919)
Unvested - end of period (in shares)			745,740,350		745,740,350
Weighted Average Grant Date Fair Value
Unvested - beginning of period (in usd per share)	$ 0.006		$ 0.005	$ 0.006
Granted (in usd per share)			0.016		$ 0.016
Vested (in usd per share)			0.016		0.016
Forfeited/Cancelled (in usd per share)			0.007		0.007
Unvested - end of period (in usd per share)			$ 0.016		$ 0.016
Class Z, Class Y, Class X, Class W and Class V Common Units | LDI Units
Shares
Unvested - beginning of period (in shares)	610,497,758			610,497,758
Vested (in shares)	(12,656,379)
Forfeited/Cancelled (in shares)	(3,552,286)
Unvested - end of period (in shares)	594,289,093
Weighted Average Grant Date Fair Value
Unvested - beginning of period (in usd per share)	$ 0.016			$ 0.016
Vested (in usd per share)	0.016
Forfeited/Cancelled (in usd per share)	0.016
Unvested - end of period (in usd per share)	$ 0.016