Segment Information (Reconciliation of Operating Revenues to Total Revenues) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Total revenues	$ 995	$ 958	$ 2,166	$ 6,460	$ 6,162	$ 4,110
Segment Reconciling Items
Segment Reporting Information [Line Items]
Total revenues	(915)	(653)	(3,550)	1,120
Operating Segments | Annuities
Segment Reporting Information [Line Items]
Total revenues	1,104	978	3,295	3,052
Operating Segments | Life
Segment Reporting Information [Line Items]
Total revenues	246	220	752	756
Operating Segments | Run-off
Segment Reporting Information [Line Items]
Total revenues	411	313	1,240	1,335
Operating Segments | Corporate & Other
Segment Reporting Information [Line Items]
Total revenues	$ 149	$ 100	$ 429	$ 197