Reinsurance - Products and Risks Reinsured (Details) - USD ($)	3 Months Ended	12 Months Ended	144 Months Ended
	Sep. 30, 2021	Dec. 31, 2021	Jan. 01, 2014
Term life insurance policies
Reinsured risk
Percentage of risk reinsured		90.00%
Universal life insurance policies
Reinsured risk
Percentage of risk reinsured		90.00%
Indexed universal life policies
Reinsured risk
Percentage of risk reinsured		50.00%
Variable universal life insurance policies
Reinsured risk
Percentage of risk reinsured		50.00%	90.00%
Universal life product with long-term care benefits
Reinsured risk
Percentage of risk reinsured		50.00%
Single life insurance policy
Reinsured risk
Maximum amount of life insurance risk retained by the entity		$ 1,500,000
Single life insurance policy | Maximum
Reinsured risk
Maximum amount of life insurance risk retained by the entity		10,000,000
Flexible premium survivorship life policy
Reinsured risk
Maximum amount of life insurance risk retained by the entity		1,500,000
Flexible premium survivorship life policy | Maximum
Reinsured risk
Maximum amount of life insurance risk retained by the entity		$ 10,000,000
Long term care insurance
Reinsured risk
Percentage of risk reinsured		50.00%
Disability income policies
Reinsured risk
Maximum amount of life insurance risk retained by the entity		$ 5,000
Subsidiary | RiverSource Life Insurance Company | Fixed deferred and immediate annuity policies
Reinsured risk
Percentage of risk reinsured	100.00%