Acquisitions - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	Sep. 30, 2020	Jun. 01, 2020	Dec. 31, 2019	Sep. 30, 2019
Business Acquisition [Line Items]
Goodwill	$ 4,458		$ 2,727	$ 2,726
F&G
Business Acquisition [Line Items]
Derivative instruments		$ 313
Mortgage loans		1,755
Investments in unconsolidated affiliates		1,049
Other long-term investments		430
Short-term investments		37
Trade and notes receivable		1
Reinsurance recoverable		3,241
Goodwill		1,731
Prepaid expenses and other assets		353
Lease assets		8
Other intangible assets		2,102
Income taxes receivable		27
Deferred tax asset		258
Assets of discontinued operations		2,392
Total assets acquired		37,014
Contractholder funds		26,456
Future policy benefits		4,106
Accounts payable and accrued liabilities		860
Notes payable		589
Funds withheld for reinsurance liabilities		816
Lease liabilities		9
Liabilities of discontinued operations		2,268
Total liabilities assumed		35,104
Net assets acquired		1,910
F&G | Fixed maturity securities
Business Acquisition [Line Items]
Securities		22,389
F&G | Preferred securities
Business Acquisition [Line Items]
Securities		876
F&G | Equity securities
Business Acquisition [Line Items]
Securities		$ 52