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Accumulated Other Comprehensive (Loss) Income (Schedule Of Components Of Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Other comprehensive income (loss), before reclassification, net of tax | $ 5 | $ (849) |
Other comprehensive income (loss), before tax | (114) | (557) | $ 840
Other comprehensive income (loss), tax | (133) | 182 | 305
Other comprehensive income (loss), net of tax | 19 | (739) | 535
Foreign currency translation adjustments |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Other comprehensive income (loss), before reclassification, before tax | 389 | (1,198) | (389)
Other comprehensive income (loss), before reclassification, tax | (10) | 22 | 0
Other comprehensive income (loss), before reclassification, net of tax | 399 | (1,220) | (389)
Other comprehensive income (loss), net of tax | 399 | (1,220) |
Pension/Post-Retirement Plans Gains (Losses) |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Other comprehensive income (loss), before reclassification, net of tax | (394) | 371 |
Recognized as component of net benefit cost (credit) | 20 | 150 | 213
Reclassification from AOCI, tax | 6 | 38 | 54
Reclassification from AOCI, net of tax | 14 | 112 | 159
Other comprehensive income (loss), before tax | (503) | 641 | 1,229
Other comprehensive income (loss), tax | (123) | 160 | 305
Other comprehensive income (loss), net of tax | (380) | 481 | 924
Prior service credits |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Recognized as component of net benefit cost (credit) | (2) | (2) | (2)
Reclassification from AOCI, tax | 0 | 0 | 0
Reclassification from AOCI, net of tax | (2) | (2) | (2)
Net actuarial losses |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Recognized as component of net benefit cost (credit) | 20 | 150 | 208
Reclassification from AOCI, tax | 5 | 38 | 52
Reclassification from AOCI, net of tax | 15 | 112 | 156
Effect of curtailment |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Recognized as component of net benefit cost (credit) |  |  | 2
Reclassification from AOCI, tax |  |  | 1
Reclassification from AOCI, net of tax |  |  | 1
Effect of settlement |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Recognized as component of net benefit cost (credit) | 2 | 2 | 5
Reclassification from AOCI, tax | 1 | 0 | 1
Reclassification from AOCI, net of tax | 1 | 2 | 4
Net gains arising during period |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Other comprehensive income (loss), before reclassification, before tax | (349) | 203 | 1,003
Other comprehensive income (loss), before reclassification, tax | (85) | 51 | 249
Other comprehensive income (loss), before reclassification, net of tax | (264) | 152 | 754
Foreign currency translation adjustments |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Other comprehensive income (loss), before reclassification, before tax | (167) | 285 | 19
Other comprehensive income (loss), before reclassification, tax | (42) | 71 | 4
Other comprehensive income (loss), before reclassification, net of tax | (125) | 214 | 15
Other adjustments |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Other comprehensive income (loss), before reclassification, before tax | (7) | 3 | (6)
Other comprehensive income (loss), before reclassification, tax | (2) | 0 | (2)
Other comprehensive income (loss), before reclassification, net of tax | $ (5) | $ 3 | $ (4)

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