Acquisitions - Narrative (Details) - F&G - USD ($) $ / shares in Units, shares in Millions, $ in Millions		1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 01, 2020	Jun. 30, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Business Acquisition [Line Items]
Percentage of outstanding equity acquired	100.00%
Consideration transferred	$ 2,700
Consideration transferred (in shares)	24
Cash paid for acquisition	$ 1,803
Liability to former owners	$ 132
Right to purchase and receive upon exercise in cash (in usd per share)	$ 8.18
Consideration, cash paid per acquiree share (in usd per share)	$ 0.0833
Shares converted, common and preferred (in shares)	7
Goodwill expected to be tax deductible	$ 16
Total revenues		$ 124	$ 2,770	$ 2,596	$ 4,151	$ 4,848
Pro forma net loss		$ 39	$ (306)	$ (271)	$ (54)	$ (581)