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Divestitures and Acquisition Acquisition of BP Products North America Inc. (BP) Terminal Assets (Details) $ in Millions |  | 12 Months Ended
--- | --- | ---
Feb. 01, 2016 USD ($) Terminals | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) Terminals
Business Acquisition [Line Items] |  |  |  |
Proceeds from noncontrolling interests |  | $ 19 | $ 12 | $ 117
BP Terminal Assets [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Number of terminals wholly owned | Terminals | 1 |  |  |
Number of terminals | Terminals | 15 |  |  |
Payments to acquire businesses, gross | $ 349 |  |  |
Property, plant and equipment acquired | 396 |  |  |
Current assets acquired | 2 |  |  |
Liabilities assumed | $ 49 |  |  |
New Joint Venture with BP [Member] | BP Terminal Assets [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Jointly Owned Utility Plant, Proportionate Ownership Share | 75.00% |  |  |
Number of terminals contributed to equity investment | Terminals | 14 |  |  |
BP [Member] | New Joint Venture with BP [Member] | BP Terminal Assets [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Jointly Owned Utility Plant, Proportionate Ownership Share | 25.00% |  |  |
Proceeds from noncontrolling interests |  |  |  | $ 84
Terminals |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Number of terminals | Terminals |  |  |  | 20

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