INVESTMENTS - Commercial mortgage and agricultural property loans by property type (Details) $ in Millions	Dec. 31, 2021 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total commercial mortgage and agricultural property loans	$ 1,508
Allowance for credit losses	(4)
Total net commercial mortgage and agricultural property loans	$ 1,504
Total commercial mortgage and agricultural property loans, percent	1.000
CALIFORNIA
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total commercial mortgage and agricultural property loans, percent	0.34
TEXAS
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total commercial mortgage and agricultural property loans, percent	0.18
NEW YORK
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total commercial mortgage and agricultural property loans, percent	0.07
Europe
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total commercial mortgage and agricultural property loans, percent	0.08
AUSTRALIA
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total commercial mortgage and agricultural property loans, percent	0.01
Apartments/Multi-Family
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total commercial mortgage and agricultural property loans	$ 385
Total commercial mortgage and agricultural property loans, percent	0.255
Hospitality
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total commercial mortgage and agricultural property loans	$ 17
Total commercial mortgage and agricultural property loans, percent	0.011
Industrial
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total commercial mortgage and agricultural property loans	$ 624
Total commercial mortgage and agricultural property loans, percent	0.415
Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total commercial mortgage and agricultural property loans	$ 196
Total commercial mortgage and agricultural property loans, percent	0.130
Other
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total commercial mortgage and agricultural property loans	$ 134
Total commercial mortgage and agricultural property loans, percent	0.089
Retail
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total commercial mortgage and agricultural property loans	$ 101
Total commercial mortgage and agricultural property loans, percent	0.067
Total commercial mortgage loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total commercial mortgage and agricultural property loans	$ 1,457
Total commercial mortgage and agricultural property loans, percent	0.967

Commercial Mortgage And Agricultural Property Loans By Property type

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- Definition

Commercial Mortgage Loans, Percentage

+ References

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- Definition

The reserve to cover probable credit losses related to specifically identified fixed maturity real estate loans as well as probable credit losses inherent in the remainder of that loan portfolio.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 310
-Section 45
-Paragraph 4
-URI https://asc.fasb.org/extlink&oid=123605502&loc=d3e21338-158488

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- Definition

Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7)
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

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