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Other Comprehensive Income (Loss) (Schedule Of Components Of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Equity [Abstract] |  |  |
Foreign currency translation adjustments, Pre-Tax | $ (529) | $ 717 | $ (742)
Foreign currency translation adjustments, Tax (Credit) | 0 | 2 | 36
Foreign currency translation adjustments, Net of Tax | (529) | 715 | (778)
Unrealized investment gains (losses), Pre-Tax | 0 | (7) | 21
Unrealized investment gains (losses), Tax (Credit) |  | (2) | 8
Unrealized investment gains (losses), Net of Tax |  | (5) | 13
Pension/post-retirement plans: |  |  |
Amortization of prior service credits, Pre-Tax | (4) | (1) | 3
Amortization of prior service credits, Tax (Credit) | (1) | 0 | 1
Amortization of prior service credits, Net of Tax | (3) | (1) | 2
Net actuarial losses, Pre-Tax | 145 | 167 | 166
Net actuarial losses, Tax (Credit) | 32 | 30 | 46
Net actuarial losses, Net of Tax | 113 | 137 | 120
Losses included in periodic pension cost, Pre-Tax | 183 | 219 | 169
Losses including in periodic pension cost, Tax (Credit) | 39 | 39 | 47
Losses including in periodic pension cost, Net of Tax | 144 | 180 | 122
Curtailment gain, Pre-Tax |  | (1) | 102
Curtailment gain, Tax (Credit) |  | 0 | 38
Curtailment gain, Net of Tax |  | (1) | 64
Effect of Settlement, Pre-Tax | 42 | 54 |
Effect of Settlement, Tax (Credit) | 8 | 9 |
Effect of Settlement, Net of Tax | 34 | 45 |
Net gain (loss) arising during period, Pre-Tax | (374) | 374 | (855)
Net gain (loss) arising during period, Tax (Credit) | (88) | 62 | (175)
Net gain (loss) arising during period, Net of Tax | (286) | 312 | (680)
Foreign currency translation adjustments, Pre-Tax | 141 | (201) | 416
Foreign currency translation adjustments, Tax (Credit) | 25 | (36) | 70
Foreign currency translation adjustments, Net of Tax | 116 | (165) | 346
Other adjustments. Pre-Tax | (41) | 16 | 49
Other adjustments, Tax (Credit) | (6) | 3 | 9
Other adjustments, Net of Tax | (35) | 13 | 40
Pension/post-retirement plans gains (losses), Pre-Tax | (91) | 408 | (119)
Pension/post-retirement plans gains (losses), Tax (Credit) | (30) | 68 | (11)
Pension/post-retirement plans gains (losses), Net of Tax | (61) | 340 | (108)
Other comprehensive (loss) income, before tax | (620) | 1,118 | (840)
Other comprehensive income (loss), Tax (Credit) | (30) | 68 | 33
Other comprehensive (loss) income, net of tax | $ (590) | $ 1,050 | $ (873)

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