Supplemental Disclosures to the Consolidated Statements of Cash Flows (Narrative) (Details) - USD ($) $ in Millions |
1 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Oct. 31, 2023 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Loss Contingencies [Line Items] | ||||
| Income taxes paid, net of refunds | $ 1,292 | $ 1,200 | $ 1,100 | |
| Non-cash issuances of common stock | 359 | 333 | 310 | |
| Stock-based compensation expense | $ 394 | $ 368 | 363 | |
| Risk and Insurance Services | Guy Carpenter Reinsurance Group | ||||
| Loss Contingencies [Line Items] | ||||
| Gain from the settlement | $ 58 | $ 58 | ||
| Litigation settlement, expense | $ 10 | |||
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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, after refund, of cash paid to foreign, federal, state, and local jurisdictions as income tax. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition 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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The fair value of stock issued in noncash financing activities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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