Financial Instruments: (Notional Amounts of Outstanding Derivative Instruments) (Details) - USD ($) $ in Millions |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|
| Derivative [Line Items] | ||
| Notional amount | $ 44,100 | $ 43,265 |
| Derivative contracts designated as hedging instruments: | Foreign exchange contracts | ||
| Derivative [Line Items] | ||
| Notional amount | 25,149 | 21,987 |
| Derivative contracts designated as hedging instruments: | Interest rate contracts | ||
| Derivative [Line Items] | ||
| Notional amount | 3,000 | 3,600 |
| Derivative contracts designated as hedging instruments: | Commodity contracts | ||
| Derivative [Line Items] | ||
| Notional amount | 9 | 20 |
| Foreign exchange contracts | Foreign exchange contracts | ||
| Derivative [Line Items] | ||
| Notional amount | $ 15,942 | $ 17,658 |