Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Financial Instruments not at FV) (Details) - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016
Financial Liabilities
Separate account liabilities measured at NAV		$ 87,368	$ 80,210
Ameriprise Financial [Member]
Financial Liabilities
Investment certificate reserves		6,388	5,924
Separate account liabilities measured at NAV		87,368	80,210
Ameriprise Financial [Member] | Carrying value [Member]
Financial Assets
Mortgage Loans, Net		2,756	2,986
Policy and certificate loans		845	831
Receivables		1,537	1,407	[1]
Restricted and segregated cash		2,524	2,905
Other investments and assets		520	508
Financial Liabilities
Policyholder account balances, future policy benefits and claims		10,246	10,906
Investment certificate reserves		6,390	5,927
Brokerage customer deposits		3,915	4,112
Separate account liabilities measured at NAV		5,177	4,253
Debt and other liabilities		3,290	3,371
Ameriprise Financial [Member] | Recurring basis [Member]
Financial Assets
Mortgage Loans, Net		2,752	2,972
Policy and certificate loans		801	808
Receivables		1,536	1,413	[1]
Restricted and segregated cash		2,524	2,905
Other investments and assets		521	510
Fair value of advisor loans moved from level 2 to level 3			400
Financial Liabilities
Policyholder account balances, future policy benefits and claims		10,755	11,417
Investment certificate reserves		6,374	5,914
Brokerage customer deposits		3,915	4,112
Separate account liabilities measured at NAV	[2]	5,177	4,253
Debt and other liabilities		3,417	3,491
Ameriprise Financial [Member] | Recurring basis [Member] | Level 1 [Member]
Financial Assets
Receivables		103	127	[1]
Restricted and segregated cash		2,524	2,905
Financial Liabilities
Brokerage customer deposits		3,915	4,112
Debt and other liabilities		118	146
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member]
Financial Assets
Policy and certificate loans			1
Receivables		946	870	[1]
Other investments and assets		472	449
Financial Liabilities
Debt and other liabilities		3,180	3,176
Ameriprise Financial [Member] | Recurring basis [Member] | Level 3 [Member]
Financial Assets
Mortgage Loans, Net		2,752	2,972
Policy and certificate loans		801	807
Receivables		487	416	[1]
Other investments and assets		49	61
Financial Liabilities
Policyholder account balances, future policy benefits and claims		10,755	11,417
Investment certificate reserves		6,374	5,914
Debt and other liabilities		$ 119	$ 169

[1] In the third quarter of 2017, the Company corrected the classification of the fair value of advisor loans, net from Level 2 to Level 3 as the valuation includes a significant unobservable input. The fair value levels at December 31, 2016 have been revised to reflect this change. The fair value of advisor loans, net was $400 million at December 31, 2016.

[2] Amounts are comprised of certain financial instruments that are measured at fair value using the NAV per share (or its equivalent) as a practical expedient and have not been classified in the fair value hierarchy. See Note 3 for further information.