Goodwill and Other Intangible Assets - Schedule of goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Line Items]
Goodwill - gross	$ 194	$ 252	$ 269
Accumulated impairments	(77)	(77)	(77)
Net goodwill	117	175	192
Increase (decrease) due to:
Dispositions	(39)	0
Other	4	(17)
Reclassified to Assets held-for-sale	(23)
Life Insurance
Goodwill [Line Items]
Goodwill - gross	170	220	236
Accumulated impairments	(67)	(67)	(67)
Net goodwill	103	153	169
Increase (decrease) due to:
Dispositions	(30)	0
Other	3	(16)
Reclassified to Assets held-for-sale	(23)
Corporate and Other
Goodwill [Line Items]
Goodwill - gross	24	32	33
Accumulated impairments	(10)	(10)	(10)
Net goodwill	14	22	$ 23
Increase (decrease) due to:
Dispositions	(9)	0
Other	1	$ (1)
Reclassified to Assets held-for-sale	$ 0