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Employee Benefit Arrangements - Net Periodic Benefit Costs and Other Changes in Plan Assets and Future Amortizaion of Prior Service Costs (Details) - Pension Plan - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Net Periodic (Benefit) Costs Recognized in Consolidated Statements of Operations:
Service cost	$ 33	$ 30	$ 24
Interest cost	109	102	103
Expected return on plan assets	(103)	(107)	(100)
Net (gain) loss recognition	24	(26)	(4)
Net periodic (benefit) costs	$ 63	$ (1)	$ 23
Discount rate	5.88%	5.28%	5.47%
Expected rate of return on plan assets	6.00%	6.00%	5.82%
Interest credit rate	3.75%	3.75%	3.00%

X

- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan.

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Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan.

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Weighted-average interest crediting rate used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, cash balance and other defined benefit plans with promised interest crediting rate.

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Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.

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Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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