Pension And Postretirement Benefits (Employee Benefit Obligation Amounts Recognized) (Details) - USD ($) $ in Millions |
Dec. 31, 2019 |
Dec. 31, 2018 |
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| Pension Benefit [Member] | ||||||
| Defined Benefit Plan Disclosure [Line Items] | ||||||
| Current portion of employee benefit obligation | [1] | $ 0 | $ 0 | |||
| Employee benefit obligation | [2] | (6,343) | (3,758) | |||
| Net amount recognized | (6,343) | (3,758) | ||||
| Postretirement Benefit [Member] | ||||||
| Defined Benefit Plan Disclosure [Line Items] | ||||||
| Current portion of employee benefit obligation | [1] | (1,365) | (1,464) | |||
| Employee benefit obligation | [2] | (10,531) | (13,637) | |||
| Net amount recognized | $ (11,896) | $ (15,101) | ||||
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as current. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as noncurrent. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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