Employee Benefit Plans (Change in Benefit Obligations) (Parenthetical) (Details) - Pension Plans Defined Benefit [Member] - USD ($) $ in Millions |
Dec. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|
| U.S. [Member] | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Accumulated benefit obligation | $ 1,793 | $ 2,359 |
| Foreign Pension Plans, Defined Benefit [Member] | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Accumulated benefit obligation | $ 3,658 | $ 4,095 |