Variable Interest Entities Variable Interest Entities (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Variable Interest Entity [Line Items]
Assets	$ 125,768	$ 121,943
Liabilities	122,303	118,607
Total fixed maturities [Member] | VIEs, not primary beneficiary [Member]
Variable Interest Entity [Line Items]
Obligation to provide financial or other support to VIEs	0
RiverSource Tax Advantaged Investments Inc [Member] | VIEs, not primary beneficiary [Member]
Variable Interest Entity [Line Items]
Assets	202	270
Liabilities	$ 9	$ 15