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- Definition

Equity Method Investment, Funding Commitment

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- Definition

Redeemable Preferred Equity Shares Disbursed

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- Definition

Ratio of fair value of collateral held to fair value of securities loaned in securities lending transactions.

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No definition available.

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Interest, dividends, rents, ancillary and other revenues earned but not yet received by the entity on its investments.

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Amount of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of obligation to return cash received as collateral for security loaned to another party.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Fair value of the amount outstanding under the credit facility.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of long-term investments classified as other.

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Amount, after effects of policies assumed or ceded, of expense related to the provision for policy benefits and costs incurred.

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Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Redemption value, as if currently redeemable, of redeemable noncontrolling interest for preferred shares, units or ownership interests classified as temporary equity and the election has been made to accrete changes in redemption value to the earliest redemption date.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Investments - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
Investments - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Schedule of Investments [Line Items]
Allowance for credit losses	$ 60		$ 60		$ 21
Other invested assets	11,508		11,508		10,839
Benefit expense	37,779	$ 38,140	110,418	$ 110,158
Proceeds from sales, maturities, calls or redemptions of fixed maturity securities	3,447	2,738	9,243	8,759
Accrued investment income receivable	308		308		295
Fair value of collateral received at time of securities lending transactions	$ 3,064		$ 3,064		$ 2,691
Securities lending transactions ratio of fair value of collateral held to fair value of securities loaned	102.00%		102.00%		102.00%
United States Government securities
Schedule of Investments [Line Items]
Allowance for credit losses	$ 0		$ 0		$ 0
Residential mortgage-backed securities
Schedule of Investments [Line Items]
Allowance for credit losses	2		2		3
Overnight and Continuous \| Cash
Schedule of Investments [Line Items]
Collateral received for securities loaned, at carrying value	2,373		2,373		2,136
Overnight and Continuous \| United States Government securities
Schedule of Investments [Line Items]
Collateral received for securities loaned, at carrying value	587		587		552
Overnight and Continuous \| Residential mortgage-backed securities
Schedule of Investments [Line Items]
Collateral received for securities loaned, at carrying value	104		104		3
Mosaic Health \| Equity Method Investee
Schedule of Investments [Line Items]
Commitment to fund	70		70		70
Equity Method Investment, Additional Funding Commitment	0		34
Benefit expense	197	162	583	662
Term Loan \| Mosaic Health \| Equity Method Investee
Schedule of Investments [Line Items]
Line of credit facility, maximum borrowing capacity	200		200		200
Line of Credit Facility, Fair Value of Amount Outstanding	188		188		188
Line of Credit \| Mosaic Health \| Equity Method Investee
Schedule of Investments [Line Items]
Line of credit facility, maximum borrowing capacity	500		500		500
Line of Credit Facility, Fair Value of Amount Outstanding	$ 188		$ 188		$ 94
Mosaic Health \| Equity Method Investee
Schedule of Investments [Line Items]
Ownership percentage	40.00%		40.00%		40.00%
Liberty Dental
Schedule of Investments [Line Items]
Ownership percentage	40.00%		40.00%		40.00%
Other invested assets	$ 168		$ 168		$ 137
Benefit expense	126	$ 149	382	$ 441
Redeemable preferred equity shares value	$ 250		250		250
Redeemable preferred equity shares disbursed			$ 165		$ 165