INVESTMENTS - Repurchase Agreements and Securities Lending (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
U.S. corporate public securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities	$ 200,000,000	$ 0
Equity securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities	186,000,000	$ 0
Overnight & Continuous | U.S. corporate public securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities	0
Overnight & Continuous | Equity securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities	186,000,000
Up to 30 days | U.S. corporate public securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities	0
Up to 30 days | Equity securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities	0
30-90 days | U.S. corporate public securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities	200,000,000
30-90 days | Equity securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities	$ 0