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Investments - Summary (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Summary of investments
Allowance for credit losses	$ 48	$ 50	$ 68	$ 68
Ameriprise Financial
Summary of investments
Available-for-Sale securities, at fair value	32,330	32,050
Mortgage loans (allowance for credit losses: 2022, $12; 2021, $12)	1,971	1,953
Policy loans	833	835
Other investments (allowance for credit losses: 2022, $5; 2021, $5)	906	972
Total	36,040	35,810
Ameriprise Financial \| Mortgage loans
Summary of investments
Allowance for credit losses	12	12
Ameriprise Financial \| Other investments
Summary of investments
Allowance for credit losses	$ 5	$ 5