Fair Value Measurements - Fair Value, Assets Measured on Nonrecurring Basis Using Unobservable Inputs (Details) - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Total Losses | $ (18) | $ (30) |
| Fair Value, Nonrecurring | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Fair Value | 22 | 5 |
| Total Losses | (18) | (30) |
| Investments | Fair Value, Nonrecurring | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Fair Value | ||
| Total Losses | (17) | (28) |
| Other assets | Fair Value, Nonrecurring | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Fair Value | 5 | |
| Total Losses | (2) | |
| Operating lease equipment | Fair Value, Nonrecurring | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Fair Value | 22 | |
| Total Losses | $ (1) | |