SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT (Footnotes) (Details 4) - Ameriprise Financial, Inc: - USD ($)	12 Months Ended
Dec. 31, 2017	Dec. 31, 2018
Investments [Abstract]
Residual tranche fair value	$ 341,000,000	$ 467,000,000
Debt
Short-term borrowings	150,000,000
Borrowings from Subsidiaries [Abstract]
Current borrowing capacity under the line of credit	1,000,000,000.0	1,200,000,000
Outstanding amount	0	0
Guarantees, Commitments and Contingencies
Maximum borrowing capacity under the line of credit		363,000,000
Loans to subsidiaries	227,000,000	372,000,000
Ameriprise Certificate Company [Member]
Guarantees, Commitments and Contingencies
Maximum commitment under Capital Support Agreement		50,000,000
IDS Property Casualty [Member]
Guarantees, Commitments and Contingencies
Maximum commitment under Capital Support Agreement		150,000,000
Ameriprise Financial Services, Inc. [Member]
Guarantees, Commitments and Contingencies
Secured demand notes		200,000,000
Ameriprise Enterprise Investment Services Inc. [Member]
Guarantees, Commitments and Contingencies
Loans to subsidiaries		60,000,000
Asset-backed Securities, Securitized Loans and Receivables [Member]
Investments [Abstract]
Residual tranche fair value		90,000,000
CashDividendsPaidToParentCompanyByConsolidatedSubsidiaries [Member]
Accounting Changes and Error Corrections [Abstract]
Correction of prior period cash flows	109,000,000
ProceedsFromLinesOfCredit [Member]
Accounting Changes and Error Corrections [Abstract]
Correction of prior period cash flows	(109,000,000)
Repurchase agreements [Member]
Debt
Repurchase agreements, debt	$ 50,000,000	50,000,000
Federal Home Loan Bank advances [Member]
Debt
Short-term borrowings		$ 150,000,000

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