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Investments - Available-for Sale Securities in Continuous Unrealized Loss Position (Details) - Ameriprise Financial
$ in Millions
Jun. 30, 2025
USD ($)
security
Dec. 31, 2024
USD ($)
security
Number of securities    
Less than 12 months | security 362 546
12 months or more | security 1,156 1,268
Total | security 1,518 1,814
Fair Value    
Less than 12 months $ 8,949 $ 13,000
12 months or more 15,534 16,991
Total 24,483 29,991
Unrealized Losses    
Less than 12 months (181) (284)
12 months or more (1,406) (1,837)
Total $ (1,587) $ (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 191 282
12 months or more | security 250 291
Total | security 441 573
Fair Value    
Less than 12 months $ 3,558 $ 5,328
12 months or more 3,748 4,042
Total 7,306 9,370
Unrealized Losses    
Less than 12 months (144) (178)
12 months or more (405) (533)
Total $ (549) $ (711)
Residential mortgage backed securities    
Number of securities    
Less than 12 months | security 124 203
12 months or more | security 640 659
Total | security 764 862
Fair Value    
Less than 12 months $ 3,849 $ 6,728
12 months or more 8,540 9,122
Total 12,389 15,850
Unrealized Losses    
Less than 12 months (31) (96)
12 months or more (819) (1,037)
Total $ (850) $ (1,133)
Commercial mortgage backed securities    
Number of securities    
Less than 12 months | security 8 24
12 months or more | security 188 233
Total | security 196 257
Fair Value    
Less than 12 months $ 121 $ 478
12 months or more 2,801 3,298
Total 2,922 3,776
Unrealized Losses    
Less than 12 months (4) (6)
12 months or more (140) (213)
Total $ (144) $ (219)
Asset backed securities    
Number of securities    
Less than 12 months | security 12 15
12 months or more | security 32 37
Total | security 44 52
Fair Value    
Less than 12 months $ 165 $ 309
12 months or more 315 384
Total 480 693
Unrealized Losses    
Less than 12 months 0 (2)
12 months or more (28) (37)
Total $ (28) $ (39)
State and municipal obligations    
Number of securities    
Less than 12 months | security 11 21
12 months or more | security 44 45
Total | security 55 66
Fair Value    
Less than 12 months $ 63 $ 57
12 months or more 124 133
Total 187 190
Unrealized Losses    
Less than 12 months (2) (2)
12 months or more (14) (17)
Total $ (16) $ (19)
U.S. government and agency obligations    
Number of securities    
Less than 12 months | security 16 1
12 months or more | security 0 0
Total | security 16 1
Fair Value    
Less than 12 months $ 1,193 $ 100
12 months or more 0 0
Total 1,193 100
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 2 3
Total | security 2 3
Fair Value    
Less than 12 months $ 0 $ 0
12 months or more 6 12
Total 6 12
Unrealized Losses    
Less than 12 months 0 0
12 months or more 0 0
Total $ 0 $ 0