Revenue Recognition - Impact of Adoption (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from contract with customer	$ 117	$ 86
Lease revenue – related parties	14	14
Cost of product sold – third parties	1	0
Cost of product sold – related parties	8	7
Operations and maintenance – third parties	13	43
Operations and maintenance – related parties	14	13
Net income	137	65
Deferred revenue – related party	1		$ 3
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	137	65
Third Parties | Transportation, Terminaling and Storage Services
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from contract with customer	42	35
Third Parties | Product Revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from contract with customer	1	0
Related Parties | Transportation, Terminaling and Storage Services
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from contract with customer	64	43
Related Parties | Product Revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from contract with customer	$ 10	$ 8