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Pensions Benefit Plans and Other Postretirement Benefits - Weighted Average Assumptions (Details) | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Weighted average assumptions used to determine net periodic pension costs and net postretirement benefit cost |  |  |
Tenure used for computing historical long-term rate of return assumption | 10 years |  |
U.S. | Pension Benefit Plans |  |  |
Weighted average assumptions used to determine pension and accumulated postretirement benefit obligations |  |  |
Discount rate used to determine pension and accumulated postretirement benefit obligations (as a percent) | 4.36% | 3.69% |
Weighted average assumptions used to determine net periodic pension costs and net postretirement benefit cost |  |  |
Discount rate used to determine net periodic pension costs and net postretirement benefit cost (as a percent) | 3.69% | 4.17% | 4.43%
Expected long-term rate of return on assets (as a percent) | 7.25% | 7.50% | 7.50%
U.S. | Other Postretirement Benefits |  |  |
Weighted average assumptions used to determine pension and accumulated postretirement benefit obligations |  |  |
Discount rate used to determine pension and accumulated postretirement benefit obligations (as a percent) | 4.30% | 3.61% | 4.11%
Weighted average assumptions used to determine net periodic pension costs and net postretirement benefit cost |  |  |
Discount rate used to determine net periodic pension costs and net postretirement benefit cost (as a percent) | 3.61% | 4.11% | 4.35%
Non-U.S. | Pension Benefit Plans |  |  |
Weighted average assumptions used to determine pension and accumulated postretirement benefit obligations |  |  |
Discount rate used to determine pension and accumulated postretirement benefit obligations (as a percent) | 3.01% | 2.76% |
Rate of compensation increase (as a percent) | 2.75% | 2.78% |
Weighted average assumptions used to determine net periodic pension costs and net postretirement benefit cost |  |  |
Discount rate used to determine net periodic pension costs and net postretirement benefit cost (as a percent) | 2.76% | 2.94% | 3.68%
Rate of compensation increase (as a percent) | 2.78% | 2.90% | 2.84%
Expected long-term rate of return on assets (as a percent) | 5.52% | 6.32% | 7.15%
Non-U.S. | Other Postretirement Benefits |  |  |
Weighted average assumptions used to determine pension and accumulated postretirement benefit obligations |  |  |
Discount rate used to determine pension and accumulated postretirement benefit obligations (as a percent) | 3.60% | 3.35% | 3.55%
Weighted average assumptions used to determine net periodic pension costs and net postretirement benefit cost |  |  |
Discount rate used to determine net periodic pension costs and net postretirement benefit cost (as a percent) | 3.35% | 3.55% | 3.80%

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- Definition This element represents the tenure, in years, used for computing the long-term rate of return assumption. + References No definition available. + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit 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=82843861&loc=d3e1928-114920 + Details
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- Definition Weighted average rate increase of compensation, used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit 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)(2) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit 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=82843861&loc=d3e1928-114920 + Details
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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit 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)(3) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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