Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Level 3 rollforwards-Liabilities) (Details) - Ameriprise Financial [Member] - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net		$ 196	$ (190)	$ 281
Indexed annuity embedded derivatives [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, at the beginning of the period		43	14	0
Total gains (losses) included in net income	[1]	4	8	(3)
Issues		3	21	17
Settlements		(1)
Balance, at the end of the period		49	43	14
IUL embedded derivatives [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, at the beginning of the period		881	628	601
Total gains (losses) included in net income	[1]	76	209	(9)
Issues		61	113	90
Settlements		(83)	(69)	(54)
Balance, at the end of the period		935	881	628
Changes in unrealized gains/ (losses) included in income relating to liabilities held at end of period	[1]	76	209	(9)
GMWB and GMAB embedded derivatives [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, at the beginning of the period		763	328	(49)
Total gains (losses) included in net income	[2]	1,152	80	49
Issues		362	361	350
Settlements		39	(6)	(22)
Balance, at the end of the period		2,316	763	328
Changes in unrealized gains/ (losses) included in income relating to liabilities held at end of period	[2]	1,206	82	47
Structured annuity embedded derivatives [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, at the beginning of the period		0
Total gains (losses) included in net income	[2]	(91)
Issues		(21)
Balance, at the end of the period		70	0
Policyholder account balances, future policy benefits and claims [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, at the beginning of the period		1,687	970	552
Total gains (losses) included in net income		1,323	297	37
Issues		405	495	457
Settlements		(45)	(75)	(76)
Balance, at the end of the period		3,370	1,687	970
Changes in unrealized gains/ (losses) included in income relating to liabilities held at end of period		1,282	291	38
Contingent Consideration Liability [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, at the beginning of the period		44	30	28
Total gains (losses) included in net income	[3]	(12)	(3)	2
Issues		20	18
Settlements		(9)	1
Balance, at the end of the period		$ 43	$ 44	$ 30

[1] Included in interest credited to fixed accounts in the Consolidated Statements of Operations.

[2] Included in benefits, claims, losses and settlement expenses in the Consolidated Statements of Operations.

[3] Included in general and administrative expense in the Consolidated Statements of Operations.