Employee Benefit Plans - Schedule of Weighted-Average Assumptions Used (Details) |
3 Months Ended | 12 Months Ended | ||
---|---|---|---|---|
Dec. 31, 2018 |
Sep. 30, 2018 |
Dec. 31, 2019 |
Dec. 31, 2018 |
|
Pension Benefits | ||||
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | ||||
Benefit Cost for Current Plan Year | 6.75% | 6.75% | ||
Benefit Cost for Subsequent Plan Year | 6.75% | 6.75% | 6.75% | |
Discount Rates: | ||||
Service Cost for Plan Year | 4.40% | 3.74% | ||
Interest Cost for Plan Year | 3.87% | 3.15% | ||
Benefit Obligation at End of Plan Year | 4.24% | 3.13% | 4.24% | |
Salary Scale Inflation | 4.60% | 4.60% | ||
Post-retirement Benefits | ||||
Discount Rates: | ||||
Service Cost for Plan Year | 4.14% | 3.68% | 4.14% | 4.14% |
Interest Cost for Plan Year | 3.45% | 2.79% | 3.51% | 3.45% |
Benefit Obligation at End of Plan Year | 3.98% | 2.87% | 3.98% |