Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Financial Instruments not at FV) (Details) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Financial Liabilities
Separate account liabilities measured at NAV		$ 77,925	$ 87,368
Ameriprise Financial [Member]
Financial Liabilities
Investment certificate reserves		7,885	6,388
Separate account liabilities measured at NAV		77,925	87,368
Ameriprise Financial [Member] | Carrying value [Member]
Financial Assets
Mortgage Loans, Net		2,696	2,756
Policy and certificate loans		861	845
Receivables		1,677	1,537
Restricted and segregated cash		2,609	2,524
Other investments and assets		572	725	[1]
Financial Liabilities
Policyholder account balances, future policy benefits and claims		9,609	10,246
Investment certificate reserves		7,886	6,390
Brokerage customer deposits		3,660	3,915
Separate account liabilities measured at NAV		4,843	5,177
Debt and other liabilities		3,296	3,290
Ameriprise Financial [Member] | Recurring basis [Member]
Financial Assets
Mortgage Loans, Net		2,661	2,752
Policy and certificate loans		810	801
Receivables		1,633	1,536
Restricted and segregated cash		2,609	2,524
Other investments and assets		551	726	[1]
Financial Liabilities
Policyholder account balances, future policy benefits and claims		9,672	10,755
Investment certificate reserves		7,845	6,374
Brokerage customer deposits		3,660	3,915
Separate account liabilities measured at NAV	[2]	4,843	5,177
Debt and other liabilities		3,304	3,417
Certificates of Deposit Fair Value Disclosure			205
Ameriprise Financial [Member] | Recurring basis [Member] | Level 1 [Member]
Financial Assets
Receivables		179	103
Restricted and segregated cash		2,609	2,524
Financial Liabilities
Brokerage customer deposits		3,660	3,915
Debt and other liabilities		188	118
Ameriprise Financial [Member] | Recurring basis [Member] | Level 2 [Member]
Financial Assets
Receivables		965	946
Other investments and assets		491	677	[1]
Financial Liabilities
Debt and other liabilities		3,059	3,180
Ameriprise Financial [Member] | Recurring basis [Member] | Level 3 [Member]
Financial Assets
Mortgage Loans, Net		2,661	2,752
Policy and certificate loans		810	801
Receivables		489	487
Other investments and assets		60	49	[1]
Financial Liabilities
Policyholder account balances, future policy benefits and claims		9,672	10,755
Investment certificate reserves		7,845	6,374
Debt and other liabilities		$ 57	$ 119

[1] Amounts have been corrected to include certificates of deposit with original or remaining maturities at the time of purchase of more than 90 days but less than 12 months of $205 million as of December 31, 2017. The certificates of deposit are classified as Level 2 and recorded at cost, which is a reasonable estimate of fair value because of the short time between the purchase of the instrument and its expected realization.

[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.