Number of financing receivables that have been modified by troubled debt restructurings.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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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 http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

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Investments - Past due commercial mortgage loans (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 loan	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Financing Receivable, Past Due [Line Items]
Past due commercial mortgage loans		$ 4,175	$ 4,233
Commercial Mortgage Loans
Financing Receivable, Past Due [Line Items]
Troubled debt restructuring, number of contracts \| loan	0
Private Placement
Financing Receivable, Past Due [Line Items]
Troubled debt restructuring, number of contracts \| loan	3
Current
Financing Receivable, Past Due [Line Items]
Past due commercial mortgage loans		4,175	4,233
30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due commercial mortgage loans		0	0
60 to 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