NET INCOME (LOSS) PER SHARE OF CLASS A COMMON STOCK - Narrative (Details)	9 Months Ended
	Sep. 30, 2020 USD ($) vote grant shares	Sep. 30, 2019	Dec. 31, 2019 shares
Class A Common Stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Conversion ratio of AOG units (in shares)	1
Shares outstanding (in shares)	228,747,302		222,994,407
Class B Common Stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Conversion ratio of AOG units (in shares)	1
Shares outstanding (in shares)	1		1
Number of votes | vote	1
Class B common stock net income (loss) | $	$ 0
Class B common stock distribution or liquidation rights (in shares)	0
Class B voting power, percent of voting rights	47.20%	44.80%
RSUs
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Number of types of grants | grant	3
Vesting period	3 years
RSUs | Plan Grants | Minimum
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Vesting period	1 year
RSUs | Plan Grants | Maximum
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Vesting period	6 years
RSUs | Bonus Grants
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Vesting period	3 years
RSUs | Performance Grants | Minimum
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Vesting period	3 years
RSUs | Performance Grants | Maximum
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Vesting period	5 years