SIGNIFICANT ACCOUNTING POLICIES - Schedule of Deferred Policy Acquisition Costs (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021	Jan. 01, 2021	Dec. 31, 2020
Deferred Policy Acquisition Cost [Line Items]
Deferred policy acquisition costs	$ 824	$ 760	$ 688	$ 672		$ 587
As Previously Reported
Deferred Policy Acquisition Cost [Line Items]
Deferred policy acquisition costs						477
Effect of Modified Retrospective Application Accounting Standards Update 2018-12
Deferred Policy Acquisition Cost [Line Items]
Deferred policy acquisition costs					$ 110	110
VUL
Deferred Policy Acquisition Cost [Line Items]
Deferred policy acquisition costs	421	410	373	361
VUL | Life Insurance & Employee Benefits Products
Deferred Policy Acquisition Cost [Line Items]
Deferred policy acquisition costs						300
VUL | Life Insurance & Employee Benefits Products | As Previously Reported
Deferred Policy Acquisition Cost [Line Items]
Deferred policy acquisition costs						230
VUL | Life Insurance & Employee Benefits Products | Effect of Modified Retrospective Application Accounting Standards Update 2018-12
Deferred Policy Acquisition Cost [Line Items]
Deferred policy acquisition costs						70
IUL
Deferred Policy Acquisition Cost [Line Items]
Deferred policy acquisition costs	$ 295	$ 296	$ 297	$ 297
IUL | Life Insurance & Employee Benefits Products
Deferred Policy Acquisition Cost [Line Items]
Deferred policy acquisition costs						287
IUL | Life Insurance & Employee Benefits Products | As Previously Reported
Deferred Policy Acquisition Cost [Line Items]
Deferred policy acquisition costs						247
IUL | Life Insurance & Employee Benefits Products | Effect of Modified Retrospective Application Accounting Standards Update 2018-12
Deferred Policy Acquisition Cost [Line Items]
Deferred policy acquisition costs						$ 40