Employee Benefit Plans (Assumptions) (Details) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
|
| Pension Plans | ||
| Weighted Average Assumptions Used to Determine Benefit Obligation | ||
| Discount rate | 4.01% | 3.46% |
| Rate of future compensation increase | 3.34% | 3.38% |
| Other Postretirement Plan | ||
| Weighted Average Assumptions Used to Determine Benefit Obligation | ||
| Discount rate | 4.07% | 3.44% |
| Other Postretirement Plan | U.S. | ||
| Assumed Health Care Cost Trend Rates | ||
| Rate to which the cost trend rate is assumed to decline (ultimate trend rate) | 4.50% | 4.50% |
| Year that the rate reaches the ultimate trend rate | 2038 | 2038 |
| Other Postretirement Plan | U.S. | Medical | ||
| Assumed Health Care Cost Trend Rates | ||
| Health care cost trend rate assumed for next year | 5.66% | 5.81% |
| Other Postretirement Plan | U.S. | Prescription | ||
| Assumed Health Care Cost Trend Rates | ||
| Health care cost trend rate assumed for next year | 7.66% | 8.49% |