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Goodwill and Intangible Assets Gross carrying value, accumulated amortization and net carrying value of intangible assets (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Intangible Assets [Line Items] |  |
Intangible Assets, Gross (Excluding Goodwill) | $ 31,618 | $ 22,473
Intangible Assets, Accumulated Amortization | (8,350) | (7,279)
Intangible Assets, Net (Excluding Goodwill) | 23,268 | 15,194
Customer-Related Intangible Assets [Member] |  |
Intangible Assets [Line Items] |  |
Intangible Assets, Gross (Excluding Goodwill) | 17,190 | 16,636
Intangible Assets, Accumulated Amortization | (6,675) | (5,909)
Intangible Assets, Net (Excluding Goodwill) | 10,515 | 10,727
Trademarks and Technology [Member] |  |
Intangible Assets [Line Items] |  |
Intangible Assets, Gross (Excluding Goodwill) | 2,917 | 2,508
Intangible Assets, Accumulated Amortization | (1,284) | (958)
Intangible Assets, Net (Excluding Goodwill) | 1,633 | 1,550
Operating licenses and certificates, trademarks, and other indefinite-lived [Member] |  |
Intangible Assets [Line Items] |  |
Intangible Assets, Gross (Excluding Goodwill) | 10,454 | 2,116
Intangible Assets, Accumulated Amortization | 0 | 0
Intangible Assets, Net (Excluding Goodwill) | 10,454 | 2,116
Other Intangible Assets [Member] |  |
Intangible Assets [Line Items] |  |
Intangible Assets, Gross (Excluding Goodwill) | 1,057 | 1,213
Intangible Assets, Accumulated Amortization | (391) | (412)
Intangible Assets, Net (Excluding Goodwill) | $ 666 | $ 801

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