Fair Value of Financial Instruments and Risk Management - Foreign Exchange Hedge (Narrative) (Details) - Foreign net investments - USD ($) $ in Billions |
Dec. 31, 2023 |
Dec. 31, 2022 |
|---|---|---|
| Derivative Instruments and Hedging Activities Disclosures [Line Items] | ||
| Unhedged foreign net investments | $ 11.5 | $ 10.6 |
| Designated as hedginginstrument | ||
| Derivative Instruments and Hedging Activities Disclosures [Line Items] | ||
| Long-term debt designated as an effective hedge | $ 2.6 | $ 2.9 |