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Accumulated Other Comprehensive Income (Loss) (Schedule Of Components Of Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Other comprehensive income (loss), before reclassification, net of tax | $ 376 | $ (180) |
Reclassification from AOCI, net of tax | 159 | 125 |
Other comprehensive income (loss), before tax | 840 | (225) | $ (554)
Other comprehensive income (loss), tax | 305 | (170) | (146)
Other comprehensive income (loss), net of tax | 535 | (55) | (408)
Foreign Currency Translation Adjustments |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Other comprehensive income (loss), before reclassification, before tax | (389) | 559 | 148
Other comprehensive income (loss), before reclassification, tax | 0 | 0 | (3)
Other comprehensive income (loss), before reclassification, net of tax | (389) | 559 | 151
Reclassification from AOCI, net of tax | 0 | 0 |
Other comprehensive income (loss), net of tax | (389) | 559 |
Pension and Post-Retirement Plans Losses |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Other comprehensive income (loss), before reclassification, net of tax | 765 | (739) |
Reclassification from AOCI, before tax | 213 | 162 | 106
Reclassification from AOCI, tax | 54 | 37 | 22
Reclassification from AOCI, net of tax | 159 | 125 | 84
Other comprehensive income (loss), before tax | 1,229 | (784) | (702)
Other comprehensive income (loss), tax | 305 | (170) | (143)
Other comprehensive income (loss), net of tax | 924 | (614) | (559)
Prior service credits |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Reclassification from AOCI, before tax | (2) | (2) | (2)
Reclassification from AOCI, tax | 0 | (1) | (1)
Reclassification from AOCI, net of tax | (2) | (1) | (1)
Net Actuarial (Loss) Gain |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Reclassification from AOCI, before tax | 208 | 161 | 102
Reclassification from AOCI, tax | 52 | 37 | 22
Reclassification from AOCI, net of tax | 156 | 124 | 80
Effect of curtailment |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Reclassification from AOCI, before tax | 2 |  |
Reclassification from AOCI, tax | 1 |  |
Reclassification from AOCI, net of tax | 1 |  |
Effect of settlement |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Reclassification from AOCI, before tax | 5 | 3 | 6
Reclassification from AOCI, tax | 1 | 1 | 1
Reclassification from AOCI, net of tax | 4 | 2 | 5
Net gains arising during period |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Other comprehensive income (loss), before reclassification, before tax | 1,003 | (772) | (758)
Other comprehensive income (loss), before reclassification, tax | 249 | (177) | (154)
Other comprehensive income (loss), before reclassification, net of tax | 754 | (595) | (604)
Foreign currency translation adjustments |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Other comprehensive income (loss), before reclassification, before tax | 19 | (163) | (50)
Other comprehensive income (loss), before reclassification, tax | 4 | (28) | (11)
Other comprehensive income (loss), before reclassification, net of tax | 15 | (135) | $ (39)
Other adjustments |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Other comprehensive income (loss), before reclassification, before tax | (6) | (11) |
Other comprehensive income (loss), before reclassification, tax | (2) | (2) |
Other comprehensive income (loss), before reclassification, net of tax | $ (4) | $ (9) |

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