Investments (excluding Consolidated Investment Entities) - Past due commercial mortgage loans (Details) $ in Millions	12 Months Ended
Dec. 31, 2021 USD ($) loan	Dec. 31, 2020 USD ($) loan
Financing Receivable, Past Due [Line Items]
Number of commercial mortgage loans in non-accrual status \| loan	0	1,000,000
Financing Receivable, Nonaccrual, Interest Income	$ 0
Commercial Portfolio Segment
Financing Receivable, Past Due [Line Items]
Threshold period past due, nonaccrual	90 days
Current
Financing Receivable, Past Due [Line Items]
Past Due Commercial Mortgage Loans	$ 5,627	$ 6,825
30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past Due Commercial Mortgage Loans	0	0
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past Due Commercial Mortgage Loans	0	0
Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Past Due Commercial Mortgage Loans	0	5
Total Segment
Financing Receivable, Past Due [Line Items]
Past Due Commercial Mortgage Loans	$ 5,627	$ 6,830

Amount of interest income on financing receivable on nonaccrual status.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 16
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447

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The balance represents the amount of loans that are secured by real estate mortgages, offset by the reserve to cover probable credit losses on the loan portfolio.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(c))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

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