Pension and Postretirement Plans (Schedule Of Fair Value Measurement Of Plan Assets Using Significant Unobservable Inputs) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of period	$ 1,718
Fair value of plan assets at end of period	1,591	$ 1,718
Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of period	42
Fair value of plan assets at end of period	45	42
United States Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of period	66	70
Foreign exchange impact	(3)	0
Fair value of plan assets at end of period	59	66
International Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of period	1,652	1,580
Foreign exchange impact	(174)	(123)
Fair value of plan assets at end of period	1,532	1,652
International Pension Benefits [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of period	42	24
Return on assets held at end of year	2	5
Return on assets sold during the year	5	0
Purchases, sales and settlements	(1)	15
Foreign exchange impact	(3)	(2)
Fair value of plan assets at end of period	45	42
Equities [Member] \| International Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of period	61
Fair value of plan assets at end of period	66	61
Equities [Member] \| International Pension Benefits [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of period	6	1
Return on assets held at end of year	1	0
Return on assets sold during the year	0	0
Purchases, sales and settlements	5	5
Foreign exchange impact	0	0
Fair value of plan assets at end of period	12	6
Fixed Income [Member] \| International Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of period	11
Fair value of plan assets at end of period	14	11
Fixed Income [Member] \| International Pension Benefits [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of period	11	6
Return on assets held at end of year	0	(1)
Return on assets sold during the year	0	0
Purchases, sales and settlements	4	7
Foreign exchange impact	(1)	(1)
Fair value of plan assets at end of period	14	11
Real Estate [Member] \| International Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of period	12
Fair value of plan assets at end of period	6	12
Real Estate [Member] \| International Pension Benefits [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of period	12	5
Return on assets held at end of year	(2)	4
Return on assets sold during the year	5	0
Purchases, sales and settlements	(8)	3
Foreign exchange impact	(1)	0
Fair value of plan assets at end of period	6	12
Cash and Cash Equivalents [Member] \| International Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of period	9
Fair value of plan assets at end of period	10	9
Cash and Cash Equivalents [Member] \| International Pension Benefits [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of period	0
Fair value of plan assets at end of period	0	0
Other [Member] \| International Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of period	13
Fair value of plan assets at end of period	13	13
Other [Member] \| International Pension Benefits [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of period	13	12
Return on assets held at end of year	3	2
Return on assets sold during the year	0	0
Purchases, sales and settlements	(2)	0
Foreign exchange impact	(1)	(1)
Fair value of plan assets at end of period	$ 13	$ 13

Actual return on plan assets, separately identifying the amount related to assets sold during the period.

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)(iv)(02)(A)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (c)(iv)(02)(A)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2446-114920

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- Definition

Actual return on plan assets, separately identifying the amount related to assets still held at the reporting date.

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- Definition

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No definition available.

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 30
-Section 35
-Paragraph 50
-URI http://asc.fasb.org/extlink&oid=49178875&loc=d3e12355-114930

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

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- Definition

Amount of gain (loss) from foreign currency exchange rate changes for benefit obligation for plans of a foreign operation whose functional currency is not the reporting currency.

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- Definition

Amount of increase (decrease) in plan assets from purchases, sales and settlement of plan obligations.

+ 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)(iv)(02)(B)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (c)(iv)(02)(B)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2446-114920

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