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Other Comprehensive Income (Loss) (Schedule Of Components Of Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Equity [Abstract] |  |  |  |  |
Foreign currency translation adjustments, Pre-Tax |  | $ 127 | $ (52) | $ 652 | $ (373)
Foreign currency translation adjustments, Tax |  | 1 | 2 | 2 | 1
Foreign currency translation adjustments, Net of Tax |  | 126 | (54) | 650 | (374)
Unrealized investment gains (losses), Pre-Tax |  | (8) | 1 | 11 | 1
Unrealized investment gains (losses), Tax |  | (3) | 0 | 5 | 0
Unrealized investment gains (losses), Net of Tax |  | (5) | 1 | 6 | 1
Pension/post-retirement plans: |  |  |  |  |
Prior services losses (gains), Pre-Tax | [1] | 0 | 1 | 0 | 2
Prior service losses (gains), Tax | [1] | 0 | 1 | 0 | 1
Prior Service losses (gains), Net of Tax | [1] | 0 | 0 | 0 | 1
Net actuarial loss, Pre-Tax | [1] | 43 | 41 | 125 | 125
Net actuarial loss, Tax | [1] | 10 | 12 | 29 | 36
Net actuarial loss, Net of Tax | [1] | 33 | 29 | 96 | 89
Subtotal, Pre-Tax |  | 43 | 42 | 125 | 127
Subtotal, Tax |  | 10 | 13 | 29 | 37
Subtotal, Net of Tax |  | 33 | 29 | 96 | 90
Effect of remeasurement, Pre-tax |  | 3 | 0 | 12 | (1)
Effect of remeasurement, Tax |  | 0 | 0 | 3 | 0
Effect of remeasurement, Net of Tax |  | 3 | 0 | 9 | (1)
Effect of curtailment, Pre-Tax |  |  |  | (1) | 3
Effect of curtailment, Tax |  |  |  | 0 | 1
Effect of curtailment, Net of Tax |  |  |  | (1) | 2
Effect of settlement, Pre-tax |  | 1 | 0 | 2 | 1
Effect of settlement, Tax |  | 0 | 0 | 0 | 0
Effect of settlement, Net of Tax |  | 1 | 0 | 2 | 1
Foreign currency translation adjustment, Pre-Tax |  | (215) | 40 | (277) | 253
Foreign currency translation adjustment, Tax |  | (38) | 4 | (49) | 41
Foreign currency translation adjustment, Net of Tax |  | (177) | 36 | (228) | 212
Other, Pre-Tax |  |  |  | (1) | 0
Other, Tax |  |  |  | 0 | 0
Other, Net of Tax |  |  |  | (1) | 0
Pension/post-retirement plans (losses) gains, Pre-Tax |  | (168) | 82 | (140) | 383
Pension/post-retirement plans (losses) gains, Tax |  | (28) | 17 | (17) | 79
Pension/post-retirement plans (losses) gains, Net of Tax |  | (140) | 65 | (123) | 304
Other comprehensive (loss) income, before tax |  | (49) | 31 | 523 | 11
Other comprehensive income (loss), Tax |  | (30) | 19 | (10) | 80
Other comprehensive (loss) income, net of tax |  | $ (19) | $ 12 | $ 533 | $ (69)
[1] | Components of net periodic pension cost are included in compensation and benefits in the Consolidated Statements of Income. Tax on prior service gains and net actuarial losses is included in income tax expense.

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- Definition Amount of tax (expense) benefit for reclassification adjustment from accumulated other comprehensive (income) loss of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e640-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=96868048&loc=SL4569616-111683 + Details
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- Definition Amount before tax and reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e637-108580 + Details
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