Revenue from Contract with Customers (Narrative) (Details) $ in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2019
USD ($)
| |
| Disaggregation of Revenue [Line Items] | |
| Deferred Revenue, Revenue Recognized | $ 91.4 |
| Average Delivery Point of Barrels in Pipeline System | 50.00% |
| Refined Products Segment [Member] | |
| Disaggregation of Revenue [Line Items] | |
| Revenue, Shipments Regulated By FERC, Percentage | 40.00% |
| Revenue, Markets Regulated By State Or FERC, Percentage | 60.00% |