Investments (AFS contractual maturity) (Details 8) - Ameriprise Financial [Member] - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Amortized cost
Due within one year	$ 2,880
Due after one year through five years	4,800
Due after five years through 10 years	2,940
Due after 10 years	4,194
Total having single maturity dates	14,814
Amortized cost	29,091	$ 30,671
Fair value
Due within one year	2,885
Due after one year through five years	4,937
Due after five years through 10 years	3,133
Due after 10 years	5,200
Total having single maturity dates	16,155
Fair value	30,642	31,058
Residential mortgage backed securities [Member]
Amortized cost
Without single maturity dates	7,697
Amortized cost	7,697	6,373
Fair value
Without single maturity dates	7,770
Fair value	7,770	6,329
Commercial mortgage backed securities [Member]
Amortized cost
Without single maturity dates	5,071
Amortized cost	5,071	4,975
Fair value
Without single maturity dates	5,158
Fair value	5,158	4,877
Asset backed securities [Member]
Amortized cost
Without single maturity dates	1,509
Amortized cost	1,509	1,373
Fair value
Without single maturity dates	1,559
Fair value	$ 1,559	$ 1,398