Retirement Benefits - Weighted Average Assumptions Used in the Measurement Of Benefit Obligation (Details)	Dec. 31, 2016	Dec. 31, 2015
U.S. Plans
Schedule of Benefit Obligations Weighted Average Assumptions [Line Items]
Discount rate	3.91%	4.12%
Rate of compensation increase	4.00%	4.00%
Non-U.S. Plans
Schedule of Benefit Obligations Weighted Average Assumptions [Line Items]
Discount rate	1.76%	2.99%
Rate of compensation increase	2.29%	2.98%

Schedule of Benefit Obligations Weighted Average Assumptions [Line Items]

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- Definition

The interest rate used to adjust for the time value of money for the 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 (k)(1)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

+ Details

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- Definition

Expected rate of compensation increases (for pay-related plans).

+ 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 (k)(2)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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