Employee Benefit Plans - Discount Rate (Details) - U.S. |
Mar. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Pension Plans Defined Benefit [Member] | Qualified Plan [Member] | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Discount Rate | 3.00% | 2.40% |
| Pension Plans Defined Benefit [Member] | Nonqualified Plan [Member] | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Discount Rate | 2.40% | 1.85% |
| Other Postretirement Benefit Plans, Defined Benefit [Member] | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Discount Rate | 2.80% | 2.20% |