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Accumulated Other Comprehensive Income (Loss) (Schedule Of Components Of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Equity [Abstract] |  |  |
Foreign currency translation adjustments, Pre-Tax | $ 559 | $ 148 | $ (529)
Foreign currency translation adjustments, Tax (Credit) | 0 | (3) | 0
Foreign currency translation adjustments, Net of Tax | 559 | 151 | (529)
Pension/post-retirement plans: |  |  |
Amortization of prior service credits, Pre-Tax | (2) | (2) | (4)
Amortization of prior service credits, Tax (Credit) | (1) | (1) | (1)
Amortization of prior service credits, Net of Tax | (1) | (1) | (3)
Amortization of net actuarial losses, Pre-Tax | 161 | 102 | 145
Amortization of net actuarial losses, Tax (Credit) | 37 | 22 | 32
Amortization of net actuarial losses, Net of Tax | 124 | 80 | 113
Amortization of effect of settlement, Pre-Tax | 3 | 6 | 42
Amortization of effect of settlement, Tax (Credit) | 1 | 1 | 8
Amortization of effect of settlement, Net of Tax | 2 | 5 | 34
Subtotal, Pre-Tax | 162 | 106 | 183
Subtotal, Tax (Credit) | 37 | 22 | 39
Subtotal, Net of Tax | 125 | 84 | 144
Net (losses) gains arising during period, Pre-Tax | (772) | (758) | (374)
Net (losses) gains arising during period, Tax (Credit) | (177) | (154) | (88)
Net (losses) gains arising during period, Net of Tax | (595) | (604) | (286)
Foreign currency translation adjustments, Pre-Tax | (163) | (50) | 141
Foreign currency translation adjustments, Tax (Credit) | (28) | (11) | 25
Foreign currency translation adjustments, Net of Tax | (135) | (39) | 116
Other adjustments. Pre-Tax | (11) |  | (41)
Other adjustments, Tax (Credit) | (2) |  | (6)
Other adjustments, Net of Tax | (9) |  | (35)
Pension/post-retirement plans (losses) gains, Pre-Tax | (784) | (702) | (91)
Pension/post-retirement plans (losses) gains, Tax (Credit) | (170) | (143) | (30)
Pension/post-retirement plans (losses) gains, Net of Tax | (614) | (559) | (61)
Other comprehensive loss, before tax | (225) | (554) | (620)
Other comprehensive (loss) income, Tax (Credit) | (170) | (146) | (30)
Other comprehensive loss, net of tax | $ (55) | $ (408) | $ (590)

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