Other Insurance Liabilities and Separate Accounts - Roll Forward of Separate Accounts (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Separate Account, Liability [Roll Forward]
Separate Accounts liability, beginning of the period	$ 3,228	$ 5,087
Premiums and deposits	457	426
Surrenders and withdrawals	(6)	(4)
Benefit payments	(495)	(464)
Investment earnings	88	(910)
Net transfers from general account	2	8
Other	(7)	(3)
Separate Accounts liability, end of the period	3,267	4,140
Cash surrender value, end of the period	$ 2,152	$ 2,827