Other Insurance Liabilities and Separate Accounts - Roll Forward of Separate Accounts (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Separate Account, Liability [Roll Forward]
Separate Accounts liability, beginning of the period	$ 3,228	$ 5,087
Premiums and deposits	246	216
Surrenders and withdrawals	0	(4)
Benefit payments	(260)	(236)
Investment earnings	23	(393)
Net transfers from general account	0	5
Other	(6)	(5)
Separate Accounts liability, end of the period	3,231	4,670
Cash surrender value, end of the period	$ 2,142	$ 3,204