| EntityCommonStockSharesOutstanding | dei |
| 2026-04-30 | shares |
908,144,404 |
| AccountsPayableAndAccruedLiabilitiesCurrent | us-gaap |
| 2026-03-31 | USD |
38,631,000,000 |
| AccountsReceivableNetCurrent | us-gaap |
| 2026-03-31 | USD |
26,587,000,000 |
| AccumulatedOtherComprehensiveIncomeLossNetOfTax | us-gaap |
| 2026-03-31 | USD |
-2,562,000,000 |
| AdditionalPaidInCapital | us-gaap |
| 2026-03-31 | USD |
556,000,000 |
| AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | us-gaap |
2026-01-01 | 2026-03-31 | shares |
18,000,000 |
| Assets | us-gaap |
| 2026-03-31 | USD |
312,644,000,000 |
| AssetsCurrent | us-gaap |
| 2026-03-31 | USD |
91,127,000,000 |
| AssetsFairValueDisclosure | us-gaap |
| 2026-03-31 | USD |
80,964,000,000 |
| AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax | us-gaap |
| 2026-03-31 | USD |
116,000,000 |
| AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax | us-gaap |
| 2026-03-31 | USD |
1,877,000,000 |
| AvailableForSaleDebtSecuritiesAmortizedCostBasis | us-gaap |
| 2026-03-31 | USD |
51,867,000,000 |
| AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost | us-gaap |
| 2026-03-31 | USD |
12,664,000,000 |
| AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue | us-gaap |
| 2026-03-31 | USD |
12,254,000,000 |
| AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost | us-gaap |
| 2026-03-31 | USD |
14,106,000,000 |
| AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue | us-gaap |
| 2026-03-31 | USD |
13,770,000,000 |
| AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost | us-gaap |
| 2026-03-31 | USD |
7,685,000,000 |
| AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue | us-gaap |
| 2026-03-31 | USD |
7,414,000,000 |
| AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost | us-gaap |
| 2026-03-31 | USD |
3,334,000,000 |
| AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue | us-gaap |
| 2026-03-31 | USD |
3,316,000,000 |
| AvailableForSaleSecuritiesDebtSecurities | us-gaap |
| 2026-03-31 | USD |
50,106,000,000 |
| CashAndCashEquivalentsAtCarryingValue | us-gaap |
| 2026-03-31 | USD |
28,001,000,000 |
| CashAndCashEquivalentsFairValueDisclosure | us-gaap |
| 2026-03-31 | USD |
28,001,000,000 |
| CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents | us-gaap |
| 2026-03-31 | USD |
28,001,000,000 |
| CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect | us-gaap |
2026-01-01 | 2026-03-31 | USD |
3,636,000,000 |
| CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffectDisposalGroupIncludingDiscontinuedOperations | us-gaap |
2026-01-01 | 2026-03-31 | USD |
3,466,000,000 |
| CommonStockDividendsPerShareCashPaid | us-gaap |
2026-01-01 | 2026-03-31 | USD/shares |
2 |
| CommonStockParOrStatedValuePerShare | us-gaap |
| 2026-03-31 | USD/shares |
0 |
| CommonStockSharesAuthorized | us-gaap |
| 2026-03-31 | shares |
3,000,000,000 |
| CommonStockSharesIssued | us-gaap |
| 2026-03-31 | shares |
908,000,000 |
| CommonStockSharesOutstanding | us-gaap |
| 2026-03-31 | shares |
908,000,000 |
| CommonStockValue | us-gaap |
| 2026-03-31 | USD |
9,000,000 |
| ComprehensiveIncomeNetOfTax | us-gaap |
2026-01-01 | 2026-03-31 | USD |
5,779,000,000 |
| ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest | us-gaap |
2026-01-01 | 2026-03-31 | USD |
201,000,000 |
| ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | us-gaap |
2026-01-01 | 2026-03-31 | USD |
5,980,000,000 |
| CostOfGoodsAndServicesSold | us-gaap |
2026-01-01 | 2026-03-31 | USD |
12,823,000,000 |
| CostsAndExpenses | us-gaap |
2026-01-01 | 2026-03-31 | USD |
102,731,000,000 |
| DebtCurrent | us-gaap |
| 2026-03-31 | USD |
6,477,000,000 |
| DebtSecuritiesAvailableForSaleAndHeldToMaturityAmortizedCostBeforeAllowanceForCreditLoss | us-gaap |
| 2026-03-31 | USD |
52,341,000,000 |
| DebtSecuritiesAvailableForSaleAndHeldToMaturityCumulativeUnrecognizedGain | us-gaap |
| 2026-03-31 | USD |
117,000,000 |
| DebtSecuritiesAvailableForSaleAndHeldToMaturityCumulativeUnrecognizedLoss | us-gaap |
| 2026-03-31 | USD |
1,881,000,000 |
| DebtSecuritiesAvailableForSaleAndHeldToMaturityFairValue | us-gaap |
| 2026-03-31 | USD |
50,577,000,000 |
| DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions | us-gaap |
| 2026-03-31 | pure |
31,000 |
| DeferredIncomeTaxExpenseBenefit | us-gaap |
2026-01-01 | 2026-03-31 | USD |
540,000,000 |
| DeferredIncomeTaxLiabilitiesNet | us-gaap |
| 2026-03-31 | USD |
2,864,000,000 |
| DeferredRevenueCurrent | us-gaap |
| 2026-03-31 | USD |
3,419,000,000 |
| DepreciationAndAmortization | us-gaap |
2026-01-01 | 2026-03-31 | USD |
1,029,000,000 |
| DividendsCash | us-gaap |
2026-01-01 | 2026-03-31 | USD |
2,005,000,000 |
| EarningsPerShareBasic | us-gaap |
2026-01-01 | 2026-03-31 | USD/shares |
7 |
| EarningsPerShareDiluted | us-gaap |
2026-01-01 | 2026-03-31 | USD/shares |
7 |
| EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents | us-gaap |
2026-01-01 | 2026-03-31 | USD |
-7,000,000 |
| EquityMethodInvestments | us-gaap |
| 2026-03-31 | USD |
3,900,000,000 |
| EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValue | us-gaap |
| 2026-03-31 | USD |
5,500,000,000 |
| EquitySecuritiesFvNiCurrentAndNoncurrent | us-gaap |
| 2026-03-31 | USD |
1,977,000,000 |
| EquitySecuritiesWithoutReadilyDeterminableFairValueAmount | us-gaap |
| 2026-03-31 | USD |
3,500,000,000 |
| EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentCumulativeAmount | us-gaap |
| 2026-03-31 | USD |
933,000,000 |
| FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3 | us-gaap |
2026-01-01 | 2026-03-31 | USD |
0 |
| FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3 | us-gaap |
2026-01-01 | 2026-03-31 | USD |
0 |
| Goodwill | us-gaap |
| 2026-03-31 | USD |
110,512,000,000 |
| HeldToMaturitySecurities | us-gaap |
| 2026-03-31 | USD |
474,000,000 |
| HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain | us-gaap |
| 2026-03-31 | USD |
1,000,000 |
| HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss | us-gaap |
| 2026-03-31 | USD |
4,000,000 |
| HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue | us-gaap |
| 2026-03-31 | USD |
4,000,000 |
| HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount | us-gaap |
| 2026-03-31 | USD |
4,000,000 |
| HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue | us-gaap |
| 2026-03-31 | USD |
185,000,000 |
| HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount | us-gaap |
| 2026-03-31 | USD |
186,000,000 |
| HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue | us-gaap |
| 2026-03-31 | USD |
14,000,000 |
| HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount | us-gaap |
| 2026-03-31 | USD |
17,000,000 |
| HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue | us-gaap |
| 2026-03-31 | USD |
268,000,000 |
| HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount | us-gaap |
| 2026-03-31 | USD |
267,000,000 |
| HeldToMaturitySecuritiesFairValue | us-gaap |
| 2026-03-31 | USD |
471,000,000 |
| IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | us-gaap |
2026-01-01 | 2026-03-31 | USD |
7,963,000,000 |
| IncomeTaxExpenseBenefit | us-gaap |
2026-01-01 | 2026-03-31 | USD |
1,482,000,000 |
| IncreaseDecreaseInAccountsPayableAndAccruedLiabilities | us-gaap |
2026-01-01 | 2026-03-31 | USD |
1,055,000,000 |
| IncreaseDecreaseInAccountsReceivable | us-gaap |
2026-01-01 | 2026-03-31 | USD |
3,544,000,000 |
| IncreaseDecreaseInDeferredRevenue | us-gaap |
2026-01-01 | 2026-03-31 | USD |
20,000,000 |
| IncreaseDecreaseInDeposits | us-gaap |
2026-01-01 | 2026-03-31 | USD |
600,000,000 |
| IncreaseDecreaseInHealthCareInsuranceLiabilities | us-gaap |
2026-01-01 | 2026-03-31 | USD |
296,000,000 |
| IncreaseDecreaseInOtherOperatingAssets | us-gaap |
2026-01-01 | 2026-03-31 | USD |
-2,919,000,000 |
| IntangibleAssetsNetExcludingGoodwill | us-gaap |
| 2026-03-31 | USD |
20,093,000,000 |
| InterestExpense | us-gaap |
2026-01-01 | 2026-03-31 | USD |
955,000,000 |
| InvestmentIncomeInterestAndDividend | us-gaap |
2026-01-01 | 2026-03-31 | USD |
1,131,000,000 |
| InvestmentOwnedBalanceContracts | us-gaap |
| 2026-03-31 | pure |
42,000 |
| Liabilities | us-gaap |
| 2026-03-31 | USD |
207,325,000,000 |
| LiabilitiesAndStockholdersEquity | us-gaap |
| 2026-03-31 | USD |
312,644,000,000 |
| LiabilitiesCurrent | us-gaap |
| 2026-03-31 | USD |
114,124,000,000 |
| LiabilityForClaimsAndClaimsAdjustmentExpense | us-gaap |
| 2026-03-31 | USD |
39,659,000,000 |
| LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1 | us-gaap |
2026-01-01 | 2026-03-31 | USD |
44,021,000,000 |
| LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1 | us-gaap |
2026-01-01 | 2026-03-31 | USD |
29,205,000,000 |
| LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredButNotReportedIBNRClaimsAmount | us-gaap |
| 2026-03-31 | USD |
27,600,000,000 |
| LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1 | us-gaap |
2026-01-01 | 2026-03-31 | USD |
73,489,000,000 |
| LoansReceivableFairValueDisclosure | us-gaap |
| 2026-03-31 | USD |
880,000,000 |
| LongTermDebtNoncurrent | us-gaap |
| 2026-03-31 | USD |
71,440,000,000 |
| LongTermInvestments | us-gaap |
| 2026-03-31 | USD |
56,788,000,000 |
| MinorityInterest | us-gaap |
| 2026-03-31 | USD |
6,014,000,000 |
| MinorityInterestChangeInRedemptionValue | us-gaap |
2026-01-01 | 2026-03-31 | USD |
51,000,000 |
| MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders | us-gaap |
2026-01-01 | 2026-03-31 | USD |
164,000,000 |
| MinorityInterestPeriodIncreaseDecrease | us-gaap |
2026-01-01 | 2026-03-31 | USD |
31,000,000 |
| NetCashProvidedByUsedInFinancingActivities | us-gaap |
2026-01-01 | 2026-03-31 | USD |
-2,992,000,000 |
| NetCashProvidedByUsedInInvestingActivities | us-gaap |
2026-01-01 | 2026-03-31 | USD |
-2,447,000,000 |