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Related Parties - Narrative (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Apr. 01, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Oct. 26, 2020	Jun. 30, 2020	Feb. 28, 2020	Dec. 31, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Available-for-sale securities		$ 73,988		$ 73,988					$ 71,374
Other investments		949		949					158
Investment funds		723		723					750
Payments to Acquire Investment Funds				970	$ 765
Distributions to noncontrolling interests				46
Payments to Acquire Interest in Subsidiaries and Affiliates	$ 66
Interest sensitive contract liabilities		141,207		141,207					102,745
Other assets		1,044		1,044					1,005
Issuance of common stock				350	0
Trading securities		2,069		2,069					2,070
Investments		144,933		144,933					107,987
Payments to Acquire Debt Securities, Available-for-sale				14,071	11,413
Related Party
Related Party Transaction [Line Items]
Available-for-sale securities		4,857		4,857					3,804
Other investments		467		467					487
Investment funds		4,808		4,808					3,550
Payments to Acquire Investment Funds				914	637
Interest sensitive contract liabilities		14,352		14,352					15,285
Equity securities		50		50					64
Trading securities		1,397		1,397					785
Payments to Acquire Debt Securities, Available-for-sale				1,526	1,065
Related Party \| Management fees associated with investment funds
Related Party Transaction [Line Items]
Due to related parties		31		31					42
Expenses from transactions with related parties		111	$ 127	362	313
Related Party \| MidCap
Related Party Transaction [Line Items]
Available-for-sale securities		537		537					624
MidCap \| Related Party
Related Party Transaction [Line Items]
Other investments		322		322					339
Investments		931		$ 931					886
Apollo \| Related Party \| Sub-allocated assets [Member]
Related Party Transaction [Line Items]
Incremental Fee Adjustment				0.025%
Base Management Fee				0.225%
Incremental Fee				0.15%
Cap On Asset Gross Book Yield				10.00%
Backbook Value										$ 103,400
Incremental Fee Reduction Adjustment				0.025%
Incremental Fee Addition Adjustment				0.025%
AmeriHome \| Related Party \| Purchase of residential mortgage loans under agreement
Related Party Transaction [Line Items]
Related party purchases		$ 0	$ 254	$ 169	254
Venerable \| Related Party
Related Party Transaction [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.257%		6.257%
Apollo Athene Strategic Partnership Advisors, LLC [Member] \| Related Party
Related Party Transaction [Line Items]
Strategic Partnership Capacity		$ 2,500		$ 2,500
PK AirFinance [Member] \| Related Party
Related Party Transaction [Line Items]
Debt Securities		1,244		1,244					1,282
Apollo Operating Group [Member] \| Related Party
Related Party Transaction [Line Items]
Investment Owned, Balance, Shares								29,154,519
Investment Owned, at Fair Value								$ 1,100
AA Infrastructure [Member] \| Related Party
Related Party Transaction [Line Items]
Equity securities		50		50					58
Trading securities		293		293					267
Funding Agreements \| Athora Holding Ltd. \| Related Party
Related Party Transaction [Line Items]
Interest sensitive contract liabilities		117		117					146
Investments
Related Party Transaction [Line Items]
Investment commitment		5,848		5,848					4,793
Investments \| A-A Mortgage \| Related Party
Related Party Transaction [Line Items]
Investment commitment		125		125
Investments \| Athora Holding Ltd. \| Related Party
Related Party Transaction [Line Items]
Investment commitment		370		370
Investments \| PK AirFinance [Member] \| Related Party
Related Party Transaction [Line Items]
Investment commitment		215		215
Investments \| AA Infrastructure [Member] \| Related Party
Related Party Transaction [Line Items]
Investment commitment		51		51
Redeemable Preferred Stock [Member] \| Related Party \| MidCap
Related Party Transaction [Line Items]
Available-for-sale securities		77		77					0
Payments to Acquire Debt Securities, Available-for-sale		67
Private equity
Related Party Transaction [Line Items]
Investment funds		257		257					236
Private equity \| Related Party
Related Party Transaction [Line Items]
Investment funds		257		257					105
Private equity \| AmeriHome \| Related Party
Related Party Transaction [Line Items]
Investment funds		666		666					487
Private equity \| Athora Holding Ltd. \| Related Party
Related Party Transaction [Line Items]
Investment funds		572		572					132
Payments to Acquire Investment Funds				361
Private equity \| Venerable \| Related Party
Related Party Transaction [Line Items]
Other investments		145		145					148
Investment funds		108		108					99
Variable Interest Entities
Related Party Transaction [Line Items]
Investment funds		0		0					19
Payments to Acquire Investment Funds				0	$ 27
Other assets		1		1					20
Trading securities		0		0					16
Variable Interest Entities \| Related Party
Related Party Transaction [Line Items]
Investment funds		0		0					664
Equity securities		0		0					6
Variable Interest Entities \| Apollo Athene Strategic Partnership Advisors, LLC [Member] \| Related Party
Related Party Transaction [Line Items]
Investment funds		137		$ 137					97
Core Sub-allocation Assets [Member] \| Apollo \| Related Party \| Sub-allocated assets [Member]
Related Party Transaction [Line Items]
Sub-allocation Fee Tier Plus				60.00%
Sub-allocation Fee				0.065%
Sub-allocation Fee Tier Minus				50.00%
Core Plus [Member] \| Apollo \| Related Party \| Sub-allocated assets [Member]
Related Party Transaction [Line Items]
Sub-allocation Fee				0.13%
Yield [Member] \| Apollo \| Related Party \| Sub-allocated assets [Member]
Related Party Transaction [Line Items]
Sub-allocation Fee				0.375%
High Alpha [Member] \| Apollo \| Related Party \| Sub-allocated assets [Member]
Related Party Transaction [Line Items]
Sub-allocation Fee				0.70%
Other Sub-allocation Assets [Member] \| Apollo \| Related Party \| Sub-allocated assets [Member]
Related Party Transaction [Line Items]
Sub-allocation Fee				0.00%
ABS
Related Party Transaction [Line Items]
Available-for-sale securities		4,200		$ 4,200					5,118
ABS \| Related Party
Related Party Transaction [Line Items]
Available-for-sale securities		2,729		2,729					2,849
ABS \| Related Party \| MidCap
Related Party Transaction [Line Items]
Trading securities		532		532					0
ABS \| Related Party \| AmeriHome
Related Party Transaction [Line Items]
Available-for-sale securities		$ 165		$ 165					$ 170
Subsequent Event \| AmeriHome
Related Party Transaction [Line Items]
Debt Securities						$ 195
Common Class A
Related Party Transaction [Line Items]
Common stock issued (in shares)		191,500,000		191,500,000					143,200,000
Common Class A \| Apollo Operating Group [Member] \| Related Party
Related Party Transaction [Line Items]
Common stock issued (in shares)								7,575,758
Issuance of common stock				$ 350
Exchange of stock [Member] \| Common Class A \| Apollo Operating Group [Member] \| Related Party
Related Party Transaction [Line Items]
Common stock issued (in shares)								27,959,184
ACRA
Related Party Transaction [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	63.45%						67.00%
Noncontrolling Interest, Ownership Percentage by Parent		36.55%		36.55%			33.00%