Adoption of Accounting Pronouncement - Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended	9 Months Ended			12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Mar. 31, 2022	Jun. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2022	Dec. 31, 2022
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income (loss)	$ 331	$ (1,052)	$ (1,896)	$ (4,690)	$ 2,049	$ (5,742)	$ (5,742)	$ (5,016)
Other comprehensive income (loss), before tax
Unrealized investment gains (losses) on available-for-sale securities	(3,155)	(5,928)	(6,697)	(14,250)	(1,767)	(20,178)		(18,156)
Remeasurement gains (losses) on future policy benefits related to discount rate	1,317	2,374	3,562	6,459	1,328	8,833		8,425
Remeasurement gains (losses) on market risk benefits related to credit risk	(254)	(52)	397	576	(220)	524		366
Foreign currency translation and other adjustments	(21)	9	(2)	(81)	6	(72)		(27)
Other Comprehensive Income (Loss), before Tax, Total	(2,326)	(3,677)	(2,869)	(7,344)	(933)	(11,021)		(9,390)
Income tax expense (benefit) related to other comprehensive income (loss)	(476)	(727)	(615)	(1,493)	(175)	(2,220)	(2,220)	(1,933)
Other comprehensive income (loss)	(1,850)	(2,950)	(2,254)	(5,851)	(758)	(8,801)	$ (8,801)	(7,457)
Comprehensive income (loss)	(1,519)	(4,002)	(4,150)	(10,541)	1,291	(14,543)		(12,473)
Less: Comprehensive income (loss) attributable to noncontrolling interests	(299)	(640)	(817)	(2,123)	357	(2,763)		(2,242)
Comprehensive income (loss) attributable to Athene Holding Ltd. shareholders	$ (1,220)	$ (3,362)	(3,333)	(8,418)	$ 934	(11,780)		(10,231)
Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income (loss)			470	868		1,193		1,238
Other comprehensive income (loss), before tax
Unrealized investment gains (losses) on available-for-sale securities			(267)	(547)		(764)		(699)
Remeasurement gains (losses) on future policy benefits related to discount rate			3,562	6,459		8,833		8,425
Remeasurement gains (losses) on market risk benefits related to credit risk			397	576		524		366
Foreign currency translation and other adjustments			(6)	(27)		(59)		(11)
Other Comprehensive Income (Loss), before Tax, Total			3,686	6,461		8,534		8,081
Income tax expense (benefit) related to other comprehensive income (loss)			555	960		1,224		1,150
Other comprehensive income (loss)			3,131	5,501		7,310		6,931
Comprehensive income (loss)			3,601	6,369		8,503		8,169
Less: Comprehensive income (loss) attributable to noncontrolling interests			777	1,397		2,024		1,927
Comprehensive income (loss) attributable to Athene Holding Ltd. shareholders			2,824	4,972		6,479		6,242
Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income (loss)			(2,366)	(5,558)		(6,935)		(6,254)
Other comprehensive income (loss), before tax
Unrealized investment gains (losses) on available-for-sale securities			(6,430)	(13,703)		(19,414)		(17,457)
Remeasurement gains (losses) on future policy benefits related to discount rate			0	0		0		0
Remeasurement gains (losses) on market risk benefits related to credit risk			0	0		0		0
Foreign currency translation and other adjustments			4	(54)		(13)		(16)
Other Comprehensive Income (Loss), before Tax, Total			(6,555)	(13,805)		(19,555)		(17,471)
Income tax expense (benefit) related to other comprehensive income (loss)			(1,170)	(2,453)		(3,444)		(3,083)
Other comprehensive income (loss)			(5,385)	(11,352)		(16,111)		(14,388)
Comprehensive income (loss)			(7,751)	(16,910)		(23,046)		(20,642)
Less: Comprehensive income (loss) attributable to noncontrolling interests			(1,594)	(3,520)		(4,787)		(4,169)
Comprehensive income (loss) attributable to Athene Holding Ltd. shareholders			$ (6,157)	$ (13,390)		$ (18,259)		$ (16,473)