Restructuring and Other Initiatives - Restructuring Reserves and Charges (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Dec. 31, 2025 |
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| Restructuring Reserve [Roll Forward] | |||||
| Balance at beginning of period | $ 2,234 | $ 854 | $ 3,948 | $ 1,243 | $ 1,243 |
| Additions, interest accretion, and other | 269 | 366 | 2,493 | 868 | |
| Reductions and payments(a) | (763) | (379) | (4,702) | (1,274) | |
| Revisions to estimates and effect of foreign currency | (1) | (1) | (1) | 4 | |
| Balance at end of period | $ 1,739 | $ 841 | $ 1,739 | $ 841 | $ 3,948 |
| X | ||||||||||
- Definition Amount of any reversal and other adjustment made during the period to the amount of a previously accrued liability for a specified type of restructuring cost including foreign currency translation adjustments, excluding adjustments for costs incurred during the period and costs settled during the period. No definition available.
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| X | ||||||||||
- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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