F&G Reinsurance - Narrative (Details)			6 Months Ended
	Jun. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jun. 30, 2020 USD ($)	Jun. 01, 2020 USD ($)
Ceded Credit Risk [Line Items]
Expected credit losses on reinsurance recoverable			$ 22,000,000	$ 0
Number of policies reinsured by foreign company not engaged in insurance			0
Reinsurance risk charge fee			$ 1,700,000
Wilton Reassurance Company
Ceded Credit Risk [Line Items]
Net amount recoverable			1,478,000,000
Kubera Reassurance Company
Ceded Credit Risk [Line Items]
Net amount recoverable			$ 828,000,000
Life and Annuity Insurance Product Line
Ceded Credit Risk [Line Items]
Reinsurance retention policy, amount retained	$ 185,000,000	$ 758,000,000
Fixed indexed annuities
Ceded Credit Risk [Line Items]
Reinsurance retention policy, amount retained	$ 1,000,000,000.0	$ 4,000,000,000.0