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Derivative Financial Instruments - Effect of Hedge Activity on Income and Expense (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Derivative Instruments, Gain (Loss) |  |  |  |
Gains/(losses) of total hedge activity | $ 601 | $ (140) | $ 1,043 | $ (427)
Cost of services |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gains/(losses) of total hedge activity | (4) | 9 | (5) | 14
Cost of sales |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gains/(losses) of total hedge activity | (5) | 15 | 2 | 27
Cost of financing |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gains/(losses) of total hedge activity | 0 | (4) | 1 | (7)
SG&A expense |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gains/(losses) of total hedge activity | 114 | 11 | 83 | 85
Other (income) and expense |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gains/(losses) of total hedge activity | 601 | (140) | 1,043 | (427)
Interest expense |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gains/(losses) of total hedge activity | $ 3 | $ (19) | $ 5 | $ (34)

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