Employee Benefit Plans (Summary of Weighted-Average Assumptions) (Details)	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015
U.S.
Assumptions Used to Determine Benefit Obligations
Discount rate	3.95%	4.35%
Rate of compensation increase	4.00%	4.00%
Assumptions Used to Determine Net Periodic Benefit Cost
Discount rate	4.35%	3.90%
Expected return on plan assets	6.75%	7.00%
Rate of compensation increase	4.00%	4.00%
Int’l.
Assumptions Used to Determine Benefit Obligations
Discount rate	2.42%	3.35%
Rate of compensation increase	3.78%	3.65%
Assumptions Used to Determine Net Periodic Benefit Cost
Discount rate	3.35%	3.10%
Expected return on plan assets	5.31%	5.15%
Rate of compensation increase	3.65%	3.20%
Other Benefits
Assumptions Used to Determine Benefit Obligations
Discount rate	3.65%	4.00%
Rate of compensation increase	0.00%	0.00%
Assumptions Used to Determine Net Periodic Benefit Cost
Discount rate	4.00%	3.70%
Expected return on plan assets	0.00%	0.00%
Rate of compensation increase	0.00%	0.00%

The interest rate used to adjust for the time value of money for the plan.

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

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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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The interest rate used to adjust for the time value of money.

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- Definition

An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Expected Long-Term Rate of Return on Plan Assets
-URI http://asc.fasb.org/extlink&oid=6512046

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
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-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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- Definition

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

+ References

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-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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