Organization and Description of Business (Narrative) (Details) bbl in Millions	Dec. 31, 2018 Terminal bbl mi
Refined Products Segment [Member]
Organization and Description of Business [Line Items]
Number of Pipeline Terminals \| Terminal	53
Number of Independent Terminals \| Terminal	25
Refined Products Segment [Member] \| Refined Products Transportation Services [Member]
Organization and Description of Business [Line Items]
Pipeline, Length \| mi	9,700
Refined Products Segment [Member] \| Ammonia Transportation Services [Member]
Organization and Description of Business [Line Items]
Pipeline, Length \| mi	1,100
Crude Oil Pipeline and Terminals Segment [Member]
Organization and Description of Business [Line Items]
Pipeline, Length \| mi	2,200
Storage Capacity	33
Contracted Storage	21
Pipeline, Length - Wholly Owned \| mi	1,000
Storage Capacity - Wholly Owned	28
Contracted Storage - Wholly Owned	19
Marine Storage Segment [Member]
Organization and Description of Business [Line Items]
Number of Independent Terminals \| Terminal	6
Storage Capacity	27
Storage Capacity - Wholly Owned	25
Number of Independent Terminals - Wholly Owned \| Terminal	5