Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Dec. 31, 2019
Loss Contingencies [Line Items]
Fair value of assets pledged as collateral	$ 1,242	$ 1,211
Possible losses in excess of amounts accrued	75
Potential future loss	79
Henkel of America v. ReliaStar Life Insurance Company
Loss Contingencies [Line Items]
Potential future loss	47
Federal Home Loan Bank \| Line of Credit
Loss Contingencies [Line Items]
Non-putable funding agreements issued to FHLB	856	877
Fair value of assets pledged as collateral	1,242	$ 1,211
Acquisition of mortgage loans
Loss Contingencies [Line Items]
Amount of purchase commitments	92
Purchase of limited partnership and private placement investments
Loss Contingencies [Line Items]
Amount of purchase commitments	872
Purchase of limited partnership and private placement investments \| VOEs
Loss Contingencies [Line Items]
Amount of purchase commitments	$ 257

Fair value of the amount outstanding under the credit facility.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611

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The minimum amount the entity agreed to spend under the long-term purchase commitment.

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Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
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The carrying amount as of the date of the latest financial statement presented of securities which are owned but transferred to serve as collateral for FHLB debt obligations, and for which the transferee does not have the right by contract or custom to sell or re-pledge them to an unrelated party.

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