Derivatives (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
|
| Derivatives, Fair Value [Line Items] | |||||
| Collateral Amount Not Provided Due to Downgrade Threshold | $ 15 | $ 15 | |||
| Derivative Instrument Detail [Abstract] | |||||
| Net amounts reclassified into net derivatives gains (losses) on discontinued cash flow hedges | (13) | $ 2 | $ (9) | $ 14 | |
| Hedging exposure to variability in future cash flows for specific length of time | 3 years | 3 years | |||
| Accumulated Other Comprehensive Income Loss | (1,700) | $ (1,700) | $ (2,100) | ||
| Cumulative foreign currency translation gain (loss) recorded in accumulated other comprehensive income (loss) for net investment in foreign operations hedges | 1,300 | 1,300 | 1,200 | ||
| Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months | (96) | ||||
| Debt Designated as Non-derivative Hedging Instrument | $ 258 | $ 258 | $ 268 | ||