Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Level 3 rollforwards-Assets) (Details) - Ameriprise Financial [Member] - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Corporate debt securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, at the beginning of the period		$ 913	$ 1,139	$ 1,311
Total gains (losses) included in net income		(1)	(1)
Total gains (losses) included in other comprehensive income (loss)		31	(26)	(8)
Purchases		55	15	138
Settlements		(248)	(214)	(302)
Balance, at the end of the period		750	913	1,139
Changes in unrealized gains (losses) included in income relating to assets held at end of period		(1)	(1)
Residential mortgage backed securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, at the beginning of the period		136	155	268
Total gains (losses) included in other comprehensive income (loss)			1	1
Purchases		477	70	132
Settlements		(12)	(29)	(43)
Transfers into Level 3				20
Transfers out of Level 3		(584)	(61)	(223)
Balance, at the end of the period		17	136	155
Commercial mortgage backed securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, at the beginning of the period		20	0	0
Purchases			72	65
Transfers out of Level 3		(20)	(52)	(65)
Balance, at the end of the period		0	20	0
Asset backed securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, at the beginning of the period		6	7	68
Total gains (losses) included in other comprehensive income (loss)		(1)	1	(4)
Purchases		18	32	64
Settlements			(1)	(29)
Transfers into Level 3		14	2	27
Transfers out of Level 3		(18)	(35)	(119)
Balance, at the end of the period		19	6	7
Changes in unrealized gains (losses) included in income relating to assets held at end of period				(1)
Common stocks [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, at the beginning of the period			0	1
Total gains (losses) included in net income				1
Sales				(1)
Transfers into Level 3				8
Transfers out of Level 3				(9)
Balance, at the end of the period				0
Total available-for-sale securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, at the beginning of the period		1,075	1,301	1,648
Total gains (losses) included in net income	[1]	(1)	(1)	1
Total gains (losses) included in other comprehensive income (loss)		30	(24)	(11)
Purchases		550	189	399
Sales				(1)
Settlements		(260)	(244)	(374)
Transfers into Level 3		14	2	55
Transfers out of Level 3		(622)	(148)	(416)
Balance, at the end of the period		786	1,075	1,301
Changes in unrealized gains (losses) included in income relating to assets held at end of period	[1]	(1)	(1)	(1)
Other derivative contracts [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, at the beginning of the period		$ 0	0
Total gains (losses) included in net income	[2]		(3)
Purchases			3
Balance, at the end of the period			$ 0	$ 0

[1] Included in net investment income in the Consolidated Statements of Operations.

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