Investments (Other Invested Assets - Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Leveraged leases, net of allowance for credit losses	$ 49	$ 50
Leveraged leases, allowance for credit losses	$ 13	$ 13
Leveraged leases by performance status as a percentage of leveraged leases	100.00%	100.00%
Minimum
Derivative [Line Items]
Percentage of other invested assets comprised of freestanding derivatives with positive estimated fair values	90.00%

The net investment in arrangements meeting the criteria to be classified as leveraged excluding deferred taxes.

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 30
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=123394354&loc=d3e45152-112736

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 50
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=123392319&loc=SL77920254-209983

Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 30
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=123392090&loc=d3e45424-112738

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