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Postretirement Benefit Plans - Weighted Average Assumptions Used (Details) | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015
U.S. defined benefit plan |  |
Weighted average assumptions used to determine benefit obligations: |  |
Discount rate (in percent) | 4.29% | 4.62%
Long-term pay progression (in percent) | 3.30% | 3.30%
Weighted average assumptions used to determine net periodic benefit cost: |  |
Discount rate (in percent) | 4.40% | 4.33%
Long term rate of return on plan assets (in percent) | 4.60% | 5.10%
Long-term pay progression (in percent) | 3.30% | 3.30%
U.S. retiree health care plan |  |
Weighted average assumptions used to determine benefit obligations: |  |
Discount rate (in percent) | 4.08% | 4.40%
Weighted average assumptions used to determine net periodic benefit cost: |  |
Discount rate (in percent) | 4.40% | 4.15%
Long term rate of return on plan assets (in percent) | 4.40% | 4.70%
Non-U.S. defined benefit plan |  |
Weighted average assumptions used to determine benefit obligations: |  |
Discount rate (in percent) | 1.76% | 2.41%
Long-term pay progression (in percent) | 3.11% | 3.21%
Weighted average assumptions used to determine net periodic benefit cost: |  |
Discount rate (in percent) | 2.41% | 2.34%
Long term rate of return on plan assets (in percent) | 3.18% | 3.55%
Long-term pay progression (in percent) | 3.21% | 3.27%

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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 + Details
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- Definition The interest rate used to adjust for the time value of money. + 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 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 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -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 + Details
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