Pension And Other Postretirement Benefits Pension and Other Postretirement Benefits - Schedule of Significant Actuarial Assumptions Used for Remeasurement (Details)
|
9 Months Ended |
12 Months Ended |
Sep. 30, 2016 |
Dec. 31, 2015 |
| Pension Plan |
|
|
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
|
|
| Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate |
3.75%
|
4.05%
|
| Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets |
6.75%
|
8.20%
|
| Other Postretirement Benefits |
|
|
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
|
|
| Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate |
3.95%
|
4.28%
|
| Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets |
6.36%
|
8.06%
|
| Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year |
8.80%
|
8.38%
|
| Defined Benefit Plan, Ultimate Health Care Cost Trend Rate |
4.50%
|
4.50%
|
| Defined Benefit Plan, Year that Rate Reaches Ultimate Trend Rate |
2023
|
2022
|