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, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net		$ 281	$ (71)	$ 98
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		0
Total gains (losses) included in net income	[1]	(3)
Issues		17
Balance, at the end of the period		14	0
IUL embedded derivatives [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, at the beginning of the period		601	464	364
Total gains (losses) included in net income	[1]	(9)	87	13
Issues		90	92	115
Settlements		(54)	(42)	(28)
Balance, at the end of the period		628	601	464
Changes in unrealized gains/ (losses) included in income relating to liabilities held at end of period	[1]	(9)	87	13
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		(49)	614	851
Total gains (losses) included in net income	[2]	49	(977)	(511)
Issues		350	326	295
Settlements		(22)	(12)	(21)
Balance, at the end of the period		328	(49)	614
Changes in unrealized gains/ (losses) included in income relating to liabilities held at end of period	[2]	47	(946)	(448)
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		552	1,078	1,215
Total gains (losses) included in net income		37	(890)	(498)
Issues		457	418	410
Settlements		(76)	(54)	(49)
Balance, at the end of the period		970	552	1,078
Changes in unrealized gains/ (losses) included in income relating to liabilities held at end of period		38	(859)	(435)
Contingent Consideration Liability [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, at the beginning of the period		28	13
Total gains (losses) included in net income	[3]	2	2
Issues			13	13
Balance, at the end of the period		$ 30	$ 28	$ 13

[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.