ORGANIZATION (Details)		9 Months Ended
	Feb. 28, 2020 shares	Sep. 30, 2020 segment holding_company $ / shares shares	Dec. 31, 2019 $ / shares shares	Sep. 05, 2019 $ / shares shares
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of segments | segment		3
Number of holding company | holding_company		6
Class A Common Stock
Entity Information [Line Items]
Common stock, shares issued		228,747,302	222,994,407
Common stock, par value (in USD per share) | $ / shares		$ 0.00001	$ 0.00001
Class A Common Stock | AGM LLC
Entity Information [Line Items]
Common stock, shares issued				1
Common stock, par value (in USD per share) | $ / shares				$ 0.00001
Class B Common Stock
Entity Information [Line Items]
Common stock, shares issued		1	1
Common stock, par value (in USD per share) | $ / shares		$ 0.00001	$ 0.00001
Class B Common Stock | AGM LLC
Entity Information [Line Items]
Common stock, shares issued				1
Common stock, par value (in USD per share) | $ / shares				$ 0.00001
Series A Preferred Stock
Entity Information [Line Items]
Preferred stock, shares issued		11,000,000	11,000,000
Series A Preferred Stock | AGM LLC
Entity Information [Line Items]
Preferred stock, shares issued				1
Preferred stock, liquidation preference (in USD per share) | $ / shares				$ 25.00
Series B Preferred Stock
Entity Information [Line Items]
Preferred stock, shares issued		12,000,000	12,000,000
Series B Preferred Stock | AGM LLC
Entity Information [Line Items]
Preferred stock, shares issued				1
Preferred stock, liquidation preference (in USD per share) | $ / shares				$ 25.00
Class C Common Stock
Entity Information [Line Items]
Common stock, shares issued		1	1
Common stock, par value (in USD per share) | $ / shares		$ 0.00001	$ 0.00001
Class C Common Stock | AGM LLC
Entity Information [Line Items]
Common stock, shares issued				1
Common stock, par value (in USD per share) | $ / shares				$ 0.00001
Intermediate Holding Companies
Entity Information [Line Items]
Economic interest percentage		52.90%
Holdings
Entity Information [Line Items]
Economic interest percentage		40.40%
Athene Holding
Entity Information [Line Items]
Equity interests issued (in shares)	29,154,519
Athene Holding | Apollo Operating Group
Entity Information [Line Items]
Ownership percentage by noncontrolling owners		6.70%
Athene Holding | Athene Holding
Entity Information [Line Items]
Incremental interest purchased	17.00%
Ownership percentage	28.00%	28.50%	11.30%