Pension and Postretirement Plans (Schedule Of Target Plan Allocation) (Details)	12 Months Ended
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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- Definition

Target allocation of investments of this type to total plan assets presented on a weighted average basis.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (c)(i)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2446-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

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Target allocation maximum percentage of investments of this type to total plan assets presented on a weighted average basis.

+ References

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Target allocation minimum percentage of investments of this type to total plan assets presented on a weighted average basis.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (c)(i)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2446-114920

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