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Investments - Available-for Sale Securities in Continuous Unrealized Loss Position (Details) - Ameriprise Financial
$ in Millions
Mar. 31, 2025
USD ($)
security
Dec. 31, 2024
USD ($)
security
Number of securities    
Less than 12 months | security 447 546
12 months or more | security 1,202 1,268
Total | security 1,649 1,814
Fair Value    
Less than 12 months $ 11,342 $ 13,000
12 months or more 16,419 16,991
Total 27,761 29,991
Unrealized Losses    
Less than 12 months (191) (284)
12 months or more (1,564) (1,837)
Total $ (1,755) $ (2,121)
Available-for-Sale Securities with gross unrealized losses considered investment grade (as a percent) 97.00% 97.00%
Corporate debt securities    
Number of securities    
Less than 12 months | security 238 282
12 months or more | security 276 291
Total | security 514 573
Fair Value    
Less than 12 months $ 4,168 $ 5,328
12 months or more 3,980 4,042
Total 8,148 9,370
Unrealized Losses    
Less than 12 months (147) (178)
12 months or more (456) (533)
Total $ (603) $ (711)
Residential mortgage backed securities    
Number of securities    
Less than 12 months | security 139 203
12 months or more | security 646 659
Total | security 785 862
Fair Value    
Less than 12 months $ 4,886 $ 6,728
12 months or more 8,878 9,122
Total 13,764 15,850
Unrealized Losses    
Less than 12 months (38) (96)
12 months or more (887) (1,037)
Total $ (925) $ (1,133)
Commercial mortgage backed securities    
Number of securities    
Less than 12 months | security 19 24
12 months or more | security 199 233
Total | security 218 257
Fair Value    
Less than 12 months $ 391 $ 478
12 months or more 3,050 3,298
Total 3,441 3,776
Unrealized Losses    
Less than 12 months (3) (6)
12 months or more (174) (213)
Total $ (177) $ (219)
Asset backed securities    
Number of securities    
Less than 12 months | security 31 15
12 months or more | security 35 37
Total | security 66 52
Fair Value    
Less than 12 months $ 1,161 $ 309
12 months or more 366 384
Total 1,527 693
Unrealized Losses    
Less than 12 months (2) (2)
12 months or more (31) (37)
Total $ (33) $ (39)
State and municipal obligations    
Number of securities    
Less than 12 months | security 13 21
12 months or more | security 43 45
Total | security 56 66
Fair Value    
Less than 12 months $ 49 $ 57
12 months or more 132 133
Total 181 190
Unrealized Losses    
Less than 12 months (1) (2)
12 months or more (16) (17)
Total $ (17) $ (19)
U.S. government and agency obligations    
Number of securities    
Less than 12 months | security 7 1
12 months or more | security 0 0
Total | security 7 1
Fair Value    
Less than 12 months $ 687 $ 100
12 months or more 0 0
Total 687 100
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 0 0
12 months or more | security 3 3
Total | security 3 3
Fair Value    
Less than 12 months $ 0 $ 0
12 months or more 13 12
Total 13 12
Unrealized Losses    
Less than 12 months 0 0
12 months or more 0 0
Total $ 0 $ 0