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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position without allowance for credit loss.

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Amount of investment attributable to disposal group held for sale or disposed of.

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INVESTMENTS - Narrative (Details) $ in Millions	3 Months Ended		12 Months Ended
INVESTMENTS - Narrative (Details) $ in Millions	Mar. 31, 2026 USD ($) security	Mar. 31, 2025 USD ($)	Dec. 31, 2025 USD ($) security
Debt Securities, Available-for-Sale [Line Items]
Aggregate market value of investments in unrealized loss position	$ 17,987		$ 11,953
Gross unrealized losses on investments in unrealized loss position	784		619
Fixed maturity securities, duration of unrealized loss, less than 12 months, gross unrealized depreciation	221		70
Fixed maturity securities, duration of unrealized loss, greater than 12 months, gross unrealized depreciation	563		549
Additional contractual commitments	2,300
Cash surrender value of life insurance	$ 1,900		$ 1,900
Number of securities held as primary beneficiary \| security	0		0
Held to maturity, carrying amount, net	$ 0		$ 11
Realized losses	0	$ 1	1
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Everest Canada \| Debt Securities
Debt Securities, Available-for-Sale [Line Items]
Fixed maturities - available for sale, at fair value and Short-term investments			139
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Everest Canada \| Short-term investments
Debt Securities, Available-for-Sale [Line Items]
Fixed maturities - available for sale, at fair value and Short-term investments			12
Partnership Interest
Debt Securities, Available-for-Sale [Line Items]
Maximum exposure to loss	4,000		3,900
Variable Interest Entity, Not Primary Beneficiary
Debt Securities, Available-for-Sale [Line Items]
Commitments to fund investments	1,300
Investment Grade
Debt Securities, Available-for-Sale [Line Items]
Fixed maturity securities, duration of unrealized loss, less than 12 months, gross unrealized depreciation	213		66
Fixed maturity securities, duration of unrealized loss, greater than 12 months, gross unrealized depreciation	554		540
Fixed maturities
Debt Securities, Available-for-Sale [Line Items]
Fixed maturity securities, duration of unrealized loss, less than 12 months, gross unrealized depreciation			70
Fixed maturity securities, duration of unrealized loss, greater than 12 months, gross unrealized depreciation	$ 563		$ 549
Issuer One \| Investments, Debt Securities Benchmark \| Issuer
Debt Securities, Available-for-Sale [Line Items]
Percentage of overall fair value of fixed maturity securities available for sale, less than	1.00%		1.70%
Issuer Two \| Investments, Debt Securities Benchmark \| Issuer
Debt Securities, Available-for-Sale [Line Items]
Percentage of overall fair value of fixed maturity securities available for sale, less than	2.00%		0.20%