SALE OF COMMERCIAL RETAIL BUSINESS AND RENEWAL RIGHTS - Schedule of Disposal Groups, Including Discontinued Operations (Details) - Disposal Group, Held-for-Sale, Not Discontinued Operations $ in Millions	Sep. 30, 2026 USD ($)
Assets held-for-sale
Cash	$ 141
Total investments and cash	239
Accrued investment income	1
Income tax asset, net	12
Other assets	22
Total assets held-for-sale	274
Liabilities held-for-sale
Other liabilities	27
Total liabilities held-for-sale	27
Everest Canada
Assets held-for-sale
Cash	121
Total investments and cash	182
Accrued investment income	0
Income tax asset, net	10
Other assets	17
Total assets held-for-sale	210
Liabilities held-for-sale
Other liabilities	5
Total liabilities held-for-sale	5
Everest Canada \| Debt Securities
Assets held-for-sale
Fixed maturities - available for sale, at fair value and Short-term investments	61
Everest Canada \| Short-term investments and cash
Assets held-for-sale
Fixed maturities - available for sale, at fair value and Short-term investments	0
Everest Colombia
Assets held-for-sale
Cash	14
Total investments and cash	38
Accrued investment income	1
Income tax asset, net	0
Other assets	1
Total assets held-for-sale	40
Liabilities held-for-sale
Other liabilities	14
Total liabilities held-for-sale	14
Everest Colombia \| Debt Securities
Assets held-for-sale
Fixed maturities - available for sale, at fair value and Short-term investments	24
Everest Colombia \| Short-term investments and cash
Assets held-for-sale
Fixed maturities - available for sale, at fair value and Short-term investments	0
Everest Mexico
Assets held-for-sale
Cash	6
Total investments and cash	19
Accrued investment income	0
Income tax asset, net	1
Other assets	4
Total assets held-for-sale	24
Liabilities held-for-sale
Other liabilities	7
Total liabilities held-for-sale	7
Everest Mexico \| Debt Securities
Assets held-for-sale
Fixed maturities - available for sale, at fair value and Short-term investments	0
Everest Mexico \| Short-term investments and cash
Assets held-for-sale
Fixed maturities - available for sale, at fair value and Short-term investments	$ 14

SALE OF COMMERCIAL RETAIL BUSINESS AND RENEWAL RIGHTS - Schedule of Disposal Groups, Including Discontinued Operations (Details) - Disposal Group, Held-for-Sale, Not Discontinued Operations
$ in Millions