Segment Information - Reconciliation of Segment Operating Income to Consolidation (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income tax (expense) benefit – non-operating	$ (140)	$ 14	$ (124)	$ (48)
Net income available to Athene Holding Ltd. common shareholders	622	276	381	1,704
Operating Segments | Retirement Services
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net income available to Athene Holding Ltd. common shareholders	361	256	773	918
Operating Segments | Corporate and Other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net income available to Athene Holding Ltd. common shareholders	(59)	(13)	(89)	(18)
Non-operating adjustments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Investment gains (losses), net of offsets	346	166	(18)	1,041
Change in fair values of derivatives and embedded derivatives – index annuities, net of offsets	72	(117)	(268)	(201)
Integration, restructuring and other non-operating expenses	0	(34)	(13)	(46)
Stock-based compensation, excluding LTIP	(1)	(3)	(11)	(9)
Income tax (expense) benefit – non-operating	$ (97)	$ 21	$ 7	$ 19