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Investments - Available-for Sale Securities in Continuous Unrealized Loss Position (Details) - Ameriprise Financial
$ in Millions
Jun. 30, 2024
USD ($)
security
Dec. 31, 2023
USD ($)
security
Number of securities    
Less than 12 months | security 412 275
12 months or more | security 1,525 1,556
Total | security 1,937 1,831
Fair Value    
Less than 12 months $ 10,287 $ 6,944
12 months or more 22,135 22,956
Total 32,422 29,900
Unrealized Losses    
Less than 12 months (87) (48)
12 months or more (2,179) (2,051)
Total $ (2,266) $ (2,099)
Available-for-Sale Securities with gross unrealized losses considered investment grade (as a percent) 97.00% 96.00%
Corporate debt securities    
Number of securities    
Less than 12 months | security 211 97
12 months or more | security 364 376
Total | security 575 473
Fair Value    
Less than 12 months $ 3,281 $ 1,276
12 months or more 5,514 5,197
Total 8,795 6,473
Unrealized Losses    
Less than 12 months (54) (11)
12 months or more (609) (496)
Total $ (663) $ (507)
Residential mortgage backed securities    
Number of securities    
Less than 12 months | security 125 82
12 months or more | security 757 734
Total | security 882 816
Fair Value    
Less than 12 months $ 4,126 $ 3,052
12 months or more 11,450 10,677
Total 15,576 13,729
Unrealized Losses    
Less than 12 months (29) (25)
12 months or more (1,203) (1,146)
Total $ (1,232) $ (1,171)
Commercial mortgage backed securities    
Number of securities    
Less than 12 months | security 19 31
12 months or more | security 272 277
Total | security 291 308
Fair Value    
Less than 12 months $ 498 $ 747
12 months or more 4,120 4,092
Total 4,618 4,839
Unrealized Losses    
Less than 12 months (2) (9)
12 months or more (302) (332)
Total $ (304) $ (341)
Asset backed securities    
Number of securities    
Less than 12 months | security 24 49
12 months or more | security 82 116
Total | security 106 165
Fair Value    
Less than 12 months $ 563 $ 885
12 months or more 909 2,840
Total 1,472 3,725
Unrealized Losses    
Less than 12 months (1) (2)
12 months or more (46) (57)
Total $ (47) $ (59)
State and municipal obligations    
Number of securities    
Less than 12 months | security 12 5
12 months or more | security 46 49
Total | security 58 54
Fair Value    
Less than 12 months $ 31 $ 29
12 months or more 130 138
Total 161 167
Unrealized Losses    
Less than 12 months (1) (1)
12 months or more (18) (19)
Total $ (19) $ (20)
U.S. government and agencies obligations    
Number of securities    
Less than 12 months | security 20 11
12 months or more | security 1 1
Total | security 21 12
Fair Value    
Less than 12 months $ 1,783 $ 955
12 months or more 0 0
Total 1,783 955
Unrealized Losses    
Less than 12 months 0 0
12 months or more 0 0
Total $ 0 $ 0
Foreign government bonds and obligations    
Number of securities    
Less than 12 months | security 1 0
12 months or more | security 3 3
Total | security 4 3
Fair Value    
Less than 12 months $ 5 $ 0
12 months or more 12 12
Total 17 12
Unrealized Losses    
Less than 12 months 0 0
12 months or more (1) (1)
Total $ (1) $ (1)