Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Other Commitments [Line Items]
Letters of Credit Outstanding, Amount	$ 1,401
Advances from FHLB	2,001	$ 2,002
Interest sensitive contract liabilities	146,247	144,566
COLI asset value	413
Value of guarantees on COLI	196
Investments
Other Commitments [Line Items]
Investment commitment	11,198	7,472
Funding Agreement Backed Repurchase Agreements [Member]
Other Commitments [Line Items]
Interest sensitive contract liabilities	1,000	1,000
Athene Global Funding | Senior notes
Other Commitments [Line Items]
Maximum borrowing capacity	3,058
Athene Global Funding | Funding Agreements
Other Commitments [Line Items]
Interest sensitive contract liabilities	$ 11,958	$ 8,822