Investments (AFS contractual maturity) (Details 8) - Ameriprise Financial [Member] - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Amortized cost
Due within one year	$ 2,311
Due after one year through five years	6,562
Due after five years through 10 years	3,852
Due after 10 years	4,316
Total having single maturity dates	17,041
Amortized cost	29,318	$ 29,472
Fair value
Due within one year	2,340
Due after one year through five years	6,820
Due after five years through 10 years	4,010
Due after 10 years	5,249
Total having single maturity dates	18,419
Fair value	30,826	30,719
Residential mortgage backed securities [Member]
Amortized cost
Without single maturity dates	6,740
Amortized cost	6,740	6,899
Fair value
Without single maturity dates	6,790
Fair value	6,790	6,918
Commercial mortgage backed securities [Member]
Amortized cost
Without single maturity dates	3,917
Amortized cost	3,917	3,347
Fair value
Without single maturity dates	3,952
Fair value	3,952	3,367
Asset backed securities [Member]
Amortized cost
Without single maturity dates	1,611
Amortized cost	1,611	1,532
Fair value
Without single maturity dates	1,646
Fair value	1,646	1,549
Common stocks [Member]
Amortized cost
Without single maturity dates	9
Amortized cost	9	10
Fair value
Without single maturity dates	19
Fair value	$ 19	$ 22