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Deferred Acquisition Costs and Deferred Sales Inducement Costs (Details) - Ameriprise Financial [Member] - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Balances of and changes in DAC [Roll Forward]    
Balance, at the beginning of the period $ 2,676 $ 2,648
Capitalization of acquisition costs 241 220
Amortization, excluding the impact of valuation assumptions review (213) (201)
Amortization, impact of valuation assumptions review 33 12
Impact of change in net unrealized (gains) losses on securities 95 (18)
Balance, at the end of the period 2,832 2,661
Balances of and changes in DSIC [Roll Forward]    
Balance at the beginning of the period 276 302
Capitalization of sales inducement costs 2 3
Amortization, excluding the impact of valuation assumptions review (26) (26)
Amortization, impact of valuation assumptions review 0 (1)
Impact of change in net unrealized (gains) losses on securities 16 1
Balance at the end of the period $ 268 $ 279