v3.20.4

Pension And Postretirement Benefits (Employee Benefit Obligation Amounts Recognized) (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |
Pension obligations and other postemployment obligations | $ 1,415 | $ 1,528
Pension Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Current portion of employee benefit obligation | 0 | 0
Employee benefit obligation | (7,552) | (6,343)
Net amount recognized | (7,552) | (6,343)
Pension Benefits | International |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension obligations and other postemployment obligations | 553 |
Postretirement Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Current portion of employee benefit obligation | (1,213) | (1,365)
Employee benefit obligation | (8,872) | (10,531)
Net amount recognized | (10,085) | $ (11,896)
Postretirement Benefits | International |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension obligations and other postemployment obligations | $ 1,299 |

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