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Investments (AFS by Type) (Details 3) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Investments    
Fair value of investment securities pledged as collateral $ 1,600 $ 1,000
Fair value of investment securities pledged as collateral that may be repledged by the counterparty 473 478
Ameriprise Financial [Member]    
Investments    
Amortized cost 29,472 27,752
Gross unrealized gains 1,472 1,347
Gross unrealized losses (225) (426)
Fair value 30,719 28,673
Noncredit OTTI [1] 8 (4)
Corporate debt securities [Member] | Ameriprise Financial [Member]    
Investments    
Amortized cost 15,231 15,750
Gross unrealized gains 1,065 894
Gross unrealized losses (60) (296)
Fair value 16,236 16,348
Noncredit OTTI [1]   3
Residential mortgage backed securities [Member] | Ameriprise Financial [Member]    
Investments    
Amortized cost 6,899 5,933
Gross unrealized gains 86 106
Gross unrealized losses (67) (66)
Fair value 6,918 5,973
Noncredit OTTI [1] (3) (12)
Commercial mortgage backed securities [Member] | Ameriprise Financial [Member]    
Investments    
Amortized cost 3,347 2,400
Gross unrealized gains 59 70
Gross unrealized losses (39) (14)
Fair value 3,367 2,456
Asset backed securities [Member] | Ameriprise Financial [Member]    
Investments    
Amortized cost 1,532 1,273
Gross unrealized gains 33 34
Gross unrealized losses (16) (11)
Fair value 1,549 1,296
Noncredit OTTI [1] 5  
State and municipal obligations [Member] | Ameriprise Financial [Member]    
Investments    
Amortized cost 2,195 2,105
Gross unrealized gains 198 213
Gross unrealized losses (35) (28)
Fair value 2,358 2,290
U.S. government and agencies obligations [Member] | Ameriprise Financial [Member]    
Investments    
Amortized cost 7 66
Gross unrealized gains 1 2
Fair value 8 68
Foreign government bonds and obligations [Member] | Ameriprise Financial [Member]    
Investments    
Amortized cost 251 218
Gross unrealized gains 17 17
Gross unrealized losses (7) (11)
Fair value 261 224
Common stocks [Member] | Ameriprise Financial [Member]    
Investments    
Amortized cost 10 7
Gross unrealized gains 13 11
Gross unrealized losses (1)  
Fair value 22 18
Noncredit OTTI $ 6 [1] $ 5
[1] Represents the amount of other-than-temporary impairment (“OTTI”) losses in AOCI. Amount includes unrealized gains and losses on impaired securities subsequent to the initial impairment measurement date. These amounts are included in gross unrealized gains and losses as of the end of the period.