Investments - Net Realized Gains and Losses on Available-for-Sale Securities (Details) - Ameriprise Financial - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Investments
Gross realized investment gains	$ 0	$ 2	$ 10	$ 22
Gross realized investment losses	(10)	(11)	(12)	(11)
Credit reversals (losses)	16	0	13	0
Other impairments	0	(6)	(2)	(6)
Total	$ 6	$ (15)	$ 9	$ 5