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Investments - Available-for-Sale Securities by Type (Details) - Ameriprise Financial - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
[1]
Investments      
Amortized Cost $ 30,541 $ 33,601  
Gross Unrealized Gains 1,644 2,727  
Gross Unrealized Losses (134) (34)  
Allowance for Credit Loss (1) (11) $ 0
Fair Value 32,050 36,283  
Accrued interest excluded from amortized cost basis 140 178  
Fair value of investment securities pledged to meet contractual obligations 3,100 3,600  
Fair value of investment securities pledged that may be sold, pledged or rehypothecated by the counterparty 314 454  
Corporate debt securities      
Investments      
Amortized Cost 8,737 11,762  
Gross Unrealized Gains 1,243 1,924  
Gross Unrealized Losses (48) (2)  
Allowance for Credit Loss 0 (10) 0
Fair Value 9,932 13,674  
Residential mortgage backed securities      
Investments      
Amortized Cost 10,927 9,845  
Gross Unrealized Gains 67 188  
Gross Unrealized Losses (50) (4)  
Fair Value 10,944 10,029  
Commercial mortgage backed securities      
Investments      
Amortized Cost 4,950 5,867  
Gross Unrealized Gains 59 242  
Gross Unrealized Losses (23) (21)  
Fair Value 4,986 6,088  
Asset backed securities      
Investments      
Amortized Cost 3,639 3,283  
Gross Unrealized Gains 26 52  
Gross Unrealized Losses (11) (5)  
Allowance for Credit Loss 0 (1) $ 0
Fair Value 3,654 3,329  
State and municipal obligations      
Investments      
Amortized Cost 850 1,088  
Gross Unrealized Gains 244 297  
Gross Unrealized Losses (1) (1)  
Allowance for Credit Loss (1) 0  
Fair Value 1,092 1,384  
U.S. government and agency obligations      
Investments      
Amortized Cost 1,301 1,456  
Fair Value 1,301 1,456  
Foreign government bonds and obligations      
Investments      
Amortized Cost 88 241  
Gross Unrealized Gains 5 22  
Gross Unrealized Losses (1) (1)  
Fair Value 92 262  
Other securities      
Investments      
Amortized Cost 49 59  
Gross Unrealized Gains   2  
Fair Value $ 49 $ 61  
[1] Prior to January 1, 2020, credit losses on Available-for-Sale securities were not recorded in an allowance but were recorded as a reduction of the book value of the security if the security was other-than-temporarily impaired.