Financial Instruments: (Notional Amounts of Outstanding Derivative Instruments) (Details) - USD ($) $ in Millions |
Dec. 31, 2023 |
Dec. 31, 2022 |
|---|---|---|
| Derivative [Line Items] | ||
| Notional amount | $ 43,265 | $ 40,401 |
| Derivative contracts designated as hedging instruments: | Foreign exchange contracts | ||
| Derivative [Line Items] | ||
| Notional amount | 21,987 | 17,627 |
| Derivative contracts designated as hedging instruments: | Interest rate contracts | ||
| Derivative [Line Items] | ||
| Notional amount | 3,600 | 1,019 |
| Derivative contracts designated as hedging instruments: | Commodity contracts | ||
| Derivative [Line Items] | ||
| Notional amount | 20 | 0 |
| Foreign exchange contracts | Foreign exchange contracts | ||
| Derivative [Line Items] | ||
| Notional amount | $ 17,658 | $ 21,755 |