| Current Federal Tax Expense (Benefit) | 474.00M | 2025-01-01 → 2025-12-31 |
| Current State and Local Tax Expense (Benefit) | 73.00M | 2025-01-01 → 2025-12-31 |
| Current Foreign Tax Expense (Benefit) | 86.00M | 2025-01-01 → 2025-12-31 |
| Current Income Tax Expense (Benefit) | 633.00M | 2025-01-01 → 2025-12-31 |
| Deferred Federal Income Tax Expense (Benefit) | 349.00M | 2025-01-01 → 2025-12-31 |
| Deferred State and Local Income Tax Expense (Benefit) | 20.00M | 2025-01-01 → 2025-12-31 |
| Deferred Foreign Income Tax Expense (Benefit) | 274.00M | 2025-01-01 → 2025-12-31 |
| SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount | 251.00M | as of 2025-12-31 |
| Share-based Payment Arrangement, Expense | 789.00M | 2025-01-01 → 2025-12-31 |
| SEC Schedule, 12-09, Valuation Allowances and Reserves, Business Acquired | 6.00M | 2025-01-01 → 2025-12-31 |
| SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense | 170.00M | 2025-01-01 → 2025-12-31 |
| SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction | 0 | 2025-01-01 → 2025-12-31 |
| Income Tax Expense (Benefit), Intraperiod Tax Allocation | 2.11B | 2025-01-01 → 2025-12-31 |
| Debt Instrument, Fair Value Disclosure | 13.09B | as of 2025-12-31 |
| Undistributed Earnings (Loss) Available to Common Shareholders, Basic | 2.14B | 2025-01-01 → 2025-12-31 |
| Participating Securities, Distributed and Undistributed Earnings (Loss), Basic | 50.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount | 1.40B | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount | 78.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount | -1.27B | 2025-01-01 → 2025-12-31 |
| Assets Sold under Agreements to Repurchase, Carrying Amount | 6.04B | as of 2025-12-31 |
| EffectiveIncomeTaxRateReconciliationCrossBorderOtherAmount | -83.00M | 2025-01-01 → 2025-12-31 |
| EffectiveIncomeTaxRateReconciliationCrossBorderTaxEffectAmount | 1.06B | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount | 99.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Amount | 40.00M | 2025-01-01 → 2025-12-31 |
| Direct Premiums Earned | 1.05B | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount | 664.00M | 2025-01-01 → 2025-12-31 |
| Assets Held-in-trust | 33.20B | as of 2025-12-31 |
| Ceded Premiums Earned | 87.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Credit, Amount | 25.00M | 2025-01-01 → 2025-12-31 |
| Assumed Premiums Earned | 1.66B | 2025-01-01 → 2025-12-31 |
| Debt Securities, Trading, Unrealized Gain (Loss) | 222.00M | 2025-01-01 → 2025-12-31 |
| Secured Debt, Repurchase Agreements | 907.00M | as of 2025-12-31 |
| Contract with Customer, Liability, Revenue Recognized | 99.00M | 2025-01-01 → 2025-12-31 |
| Debt Securities, Trading, Realized Gain (Loss) | 380.00M | 2025-01-01 → 2025-12-31 |
| Derivative, Gain (Loss) on Derivative, Net | -1.57B | 2025-01-01 → 2025-12-31 |
| Equity Securities, FV-NI, Unrealized Gain (Loss) | 36.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount | -70.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount | -58.00M | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Tax Contingency, Amount | 8.00M | 2025-01-01 → 2025-12-31 |
| Dividends, Common Stock | 1.14B | 2025-01-01 → 2025-12-31 |
| Undistributed Earnings (Loss) Available to Common Shareholders, Diluted | 2.14B | 2025-01-01 → 2025-12-31 |
| Debt Securities, Available-for-sale, Realized Gain | 2.74B | 2025-01-01 → 2025-12-31 |
| Debt Securities, Available-for-sale, Realized Loss | 1.24B | 2025-01-01 → 2025-12-31 |
| Debt Securities, Available-for-sale, Realized Gain (Loss) | 1.51B | 2025-01-01 → 2025-12-31 |
| Effective Income Tax Rate Reconciliation, Other Adjustments, Amount | 5.00M | 2025-01-01 → 2025-12-31 |
| Net Income (Loss) Available to Common Stockholders, Diluted | 3.40B | 2025-01-01 → 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 665.00M | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 11.28B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | 11.94B | as of 2025-12-31 |
| Dividend, Share-based Payment Arrangement | 58.00M | 2025-01-01 → 2025-12-31 |
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 3.54B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 12.30B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 45.87B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 56.04B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Unrealized Loss Position | 101.90B | as of 2025-12-31 |
| Deferred Tax Assets, Tax Credit Carryforwards, Foreign | 1.70B | as of 2025-12-31 |
| Stock Repurchased During Period, Value | 773.00M | 2025-01-01 → 2025-12-31 |
| Fair Value, Option, Credit Risk, Gains (Losses) on Assets | -61.00M | 2025-01-01 → 2025-12-31 |
| Derivative, Collateral, Right to Reclaim Cash | 2.49B | as of 2025-12-31 |
| Derivative, Collateral, Right to Reclaim Securities | 2.60B | as of 2025-12-31 |
| Derivative, Collateral, Obligation to Return Cash | 5.91B | as of 2025-12-31 |
| Derivative, Collateral, Obligation to Return Securities | 2.60B | as of 2025-12-31 |
| Deferred Tax Assets, Valuation Allowance | 251.00M | as of 2025-12-31 |
| Assets, Fair Value Disclosure | 386.60B | as of 2025-12-31 |
| Present Value of Future Insurance Profits, Expected Amortization, Year One | 264.00M | as of 2025-12-31 |
| Present Value of Future Insurance Profits, Expected Amortization, Year Two | 228.00M | as of 2025-12-31 |
| Present Value of Future Insurance Profits, Expected Amortization, Year Three | 193.00M | as of 2025-12-31 |
| Present Value of Future Insurance Profits, Expected Amortization, Year Four | 163.00M | as of 2025-12-31 |
| Present Value of Future Insurance Profits, Expected Amortization, Year Five | 139.00M | as of 2025-12-31 |
| Financial and Nonfinancial Liabilities, Fair Value Disclosure | 28.14B | as of 2025-12-31 |
| Present Value of Future Insurance Profits, Addition from Acquisition | 0 | 2025-01-01 → 2025-12-31 |
| Debt Securities, Available-for-sale, Allowance for Credit Loss | 758.00M | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded | 55.00M | 2025-01-01 → 2025-12-31 |
| Debt Securities, Available-for-sale, Allowance for Credit Loss, Securities Sold | 71.00M | 2025-01-01 → 2025-12-31 |
| Debt Securities, Available-for-sale, Allowance for Credit Loss, Not to Sell before Recovery, Credit Loss, Previously Recorded, Expense (Reversal) | 65.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits | 8.00M | as of 2025-12-31 |
| Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions | 5.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities | 7.00M | 2025-01-01 → 2025-12-31 |
| Unrecognized Tax Benefits, Interest on Income Taxes Accrued | 2.00M | as of 2025-12-31 |
| Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 10.00M | as of 2025-12-31 |
| Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount | 151.10B | as of 2025-12-31 |
| Variable Interest Entity, Nonconsolidated, Comparison of Carrying Amount of Assets and Liabilities to Maximum Loss Exposure | 134.99B | as of 2025-12-31 |
| Liability for Future Policy Benefit, before Reinsurance | 50.26B | as of 2025-12-31 |
| Liability for Future Policy Benefit, Interest Expense | 1.80B | 2025-01-01 → 2025-12-31 |
| LiabilityForFuturePolicyBenefitRemeasurementGainLossLimitedPaymentContract | 35.00M | 2025-01-01 → 2025-12-31 |
| LiabilityForFuturePolicyBenefitRemeasurementGainLoss | 24.00M | 2025-01-01 → 2025-12-31 |
| Income (Loss) from Continuing Operations before Income Taxes, Foreign | 7.66B | 2025-01-01 → 2025-12-31 |
| PolicyholderAccountBalanceBenefitPayment | 10.32B | 2025-01-01 → 2025-12-31 |
| PolicyholderAccountBalanceIssuance | 81.97B | 2025-01-01 → 2025-12-31 |
| PolicyholderAccountBalancePolicyCharge | 797.00M | 2025-01-01 → 2025-12-31 |
| PolicyholderAccountBalanceSurrenderAndWithdrawal | 21.30B | 2025-01-01 → 2025-12-31 |
| PolicyholderAccountBalanceIncreaseDecreaseFromOtherChange | 114.00M | 2025-01-01 → 2025-12-31 |
| MarketRiskBenefitBeforeReinsuranceAndCumulativeIncreaseDecreaseFromInstrumentSpecificCreditRiskChange | 4.46B | as of 2025-12-31 |
| Market Risk Benefit, Interest Expense | 191.00M | 2025-01-01 → 2025-12-31 |
| MarketRiskBenefitAttributedFeeCollected | 396.00M | 2025-01-01 → 2025-12-31 |
| MarketRiskBenefitBenefitPayment | 70.00M | 2025-01-01 → 2025-12-31 |
| MarketRiskBenefitIssuance | 429.00M | 2025-01-01 → 2025-12-31 |
| MarketRiskBenefitIncreaseDecreaseFromActualPolicyholderBehaviorDifferentFromExpected | -43.00M | 2025-01-01 → 2025-12-31 |
| Market Risk Benefit, Increase (Decrease) from Equity Market Change | -112.00M | 2025-01-01 → 2025-12-31 |
| MarketRiskBenefitIncreaseDecreaseFromFutureExpectedPolicyholderBehaviorAssumption | 112.00M | 2025-01-01 → 2025-12-31 |
| MarketRiskBenefitIncreaseDecreaseFromInterestRateChange | 7.00M | 2025-01-01 → 2025-12-31 |
| MarketRiskBenefitIncreaseDecreaseFromOtherAssumption | -12.00M | 2025-01-01 → 2025-12-31 |
| MarketRiskBenefitPeriodIncreaseDecrease | 1.00B | 2025-01-01 → 2025-12-31 |
| AociMarketRiskBenefitInstrumentSpecificCreditRiskBeforeTax | -260.00M | as of 2025-12-31 |
| MarketRiskBenefitReinsuranceRecoverableAfterAllowance | 73.00M | as of 2025-12-31 |
| MarketRiskBenefitAfterReinsuranceAndCumulativeIncreaseDecreaseFromInstrumentSpecificCreditRiskChange | 4.64B | as of 2025-12-31 |
| MarketRiskBenefitAssetAmount | 214.00M | as of 2025-12-31 |
| MarketRiskBenefitLiabilityAmount | 4.93B | as of 2025-12-31 |
| Debt Securities, Available-for-sale, Amortized Cost | 228.17B | as of 2025-12-31 |
| Derivative Liability, Fair Value, Gross Liability | 5.74B | as of 2025-12-31 |
| Derivative Asset, Fair Value, Gross Asset | 9.19B | as of 2025-12-31 |
| APIC, Share-based Payment Arrangement, Increase for Cost Recognition | 710.00M | 2025-01-01 → 2025-12-31 |