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Pension and Postretirement Plans (Schedule Of Target Plan Allocation) (Details) | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015
International Pension Benefits [Member] | 2015 [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target plan asset allocations | 100.00% |
International Pension Benefits [Member] | Equities [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Equity securities, minimum |  | 0.00%
Equity securities, maximum |  | 51.00%
International Pension Benefits [Member] | Equities [Member] | 2015 [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target plan asset allocations | 20.00% |
Equity securities, minimum | 0.00% |
Equity securities, maximum | 60.00% |
International Pension Benefits [Member] | Fixed Income [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Equity securities, minimum |  | 0.00%
Equity securities, maximum |  | 100.00%
International Pension Benefits [Member] | Fixed Income [Member] | 2015 [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target plan asset allocations | 37.00% |
Equity securities, minimum | 0.00% |
Equity securities, maximum | 100.00% |
International Pension Benefits [Member] | Hedge Funds [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Equity securities, minimum |  | 0.00%
Equity securities, maximum |  | 20.00%
International Pension Benefits [Member] | Hedge Funds [Member] | 2015 [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target plan asset allocations | 22.00% |
Equity securities, minimum | 0.00% |
Equity securities, maximum | 35.00% |
International Pension Benefits [Member] | Real Estate [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Equity securities, minimum |  | 0.00%
Equity securities, maximum |  | 10.00%
International Pension Benefits [Member] | Real Estate [Member] | 2015 [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target plan asset allocations | 5.00% |
Equity securities, minimum | 0.00% |
Equity securities, maximum | 10.00% |
International Pension Benefits [Member] | Cash and Cash Equivalents [Member] | 2015 [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target plan asset allocations | 0.00% |
International Pension Benefits [Member] | Other [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Equity securities, minimum |  | 0.00%
Equity securities, maximum |  | 35.00%
International Pension Benefits [Member] | Other [Member] | 2015 [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target plan asset allocations | 16.00% |
Equity securities, minimum | 0.00% |
Equity securities, maximum | 20.00% |
United States Pension Benefits [Member] | 2015 [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target plan asset allocations | 100.00% |
United States Pension Benefits [Member] | Equities [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Equity securities, minimum |  | 47.00%
Equity securities, maximum |  | 47.00%
United States Pension Benefits [Member] | Equities [Member] | 2015 [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target plan asset allocations | 49.00% |
Equity securities, minimum | 49.00% |
Equity securities, maximum | 49.00% |
United States Pension Benefits [Member] | Fixed Income [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Equity securities, minimum |  | 31.00%
Equity securities, maximum |  | 31.00%
United States Pension Benefits [Member] | Fixed Income [Member] | 2015 [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target plan asset allocations | 32.00% |
Equity securities, minimum | 32.00% |
Equity securities, maximum | 32.00% |
United States Pension Benefits [Member] | Hedge Funds [Member] | 2015 [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target plan asset allocations | 0.00% |
United States Pension Benefits [Member] | Real Estate [Member] | 2015 [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target plan asset allocations | 0.00% |
United States Pension Benefits [Member] | Cash and Cash Equivalents [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Equity securities, minimum |  | 22.00%
Equity securities, maximum |  | 22.00%
United States Pension Benefits [Member] | Cash and Cash Equivalents [Member] | 2015 [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target plan asset allocations | 19.00% |
Equity securities, minimum | 19.00% |
Equity securities, maximum | 19.00% |
United States Pension Benefits [Member] | Other [Member] | 2015 [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target plan asset allocations | 0.00% |

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