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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, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Investments
Gross realized investment gains	$ 4	$ 0	$ 4	$ 10
Gross realized investment losses	(3)	(10)	(3)	(12)
Credit reversals (losses)	(3)	16	(3)	13
Other impairments	0	0	0	(2)
Total	(2)	6	(2)	9
Realized gains or losses on Available-for-Sale securities (less than)	$ (2)	$ 6	$ (2)	$ 9

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