Investments (excluding Consolidated Investment Entities) - Past due commercial mortgage loans (Details) - USD ($)	9 Months Ended
Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Financing Receivable, 90 Days or More Past Due, Still Accruing		$ 0
Financing Receivable, Nonaccrual, Interest Income	$ 0
Current
Financing Receivable, Past Due [Line Items]
Past due commercial mortgage loans	5,408,000,000	5,627,000,000
30-59 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	0
Total
Financing Receivable, Past Due [Line Items]
Past due commercial mortgage loans	$ 5,408,000,000	$ 5,627,000,000

Amount of interest income on financing receivable on nonaccrual status.

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- Definition

Amortized cost of financing receivable 90 days or more past due and still accruing. Excludes net investment in lease.

+ References

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

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5111-111524

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
-Paragraph 80
-URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922355-210448

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+ References

No definition available.

+ Details

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- Definition

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 https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910

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