Pension and Other Postretirement Benefits (Plan Asset Allocations) (Details)	Dec. 31, 2017
United States [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, actual plan asset allocation	94.00%
United States [Member] \| Fixed Income Instrument [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, actual plan asset allocation	71.00%
United States [Member] \| Equity securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, actual plan asset allocation	24.00%
United States [Member] \| Minimum [Member] \| Fixed Income Instrument [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, target plan asset allocations	70.00%
United States [Member] \| Minimum [Member] \| Equity securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, target plan asset allocations	16.00%
United States [Member] \| Maximum [Member] \| Fixed Income Instrument [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, target plan asset allocations	80.00%
United States [Member] \| Maximum [Member] \| Equity securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, target plan asset allocations	28.00%
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, actual plan asset allocation	6.00%
Foreign Plan [Member] \| Fixed Income Instrument [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, actual plan asset allocation	69.00%
Foreign Plan [Member] \| Equity securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, actual plan asset allocation	17.00%

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No definition available.

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- Definition

Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ 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)(5)(i)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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- Definition

Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

+ 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)
-URI http://asc.fasb.org/extlink&oid=82843861&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)(1)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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