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Lease Operations (Schedule of Investment in Assets Held for Operating Lease) (Details) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Property Subject to or Available for Operating Lease [Line Items] |  |
Total | $ 5,714 | $ 3,119
Less accumulated depreciation | 2,038 | 1,056
Property, plant and equipment, net | 3,676 | 2,063
Natural gas gathering and NGL transportation pipelines and facilities |  |
Property Subject to or Available for Operating Lease [Line Items] |  |
Total | 964 | 851
Processing, fractionation and storage facilities |  |
Property Subject to or Available for Operating Lease [Line Items] |  |
Total | 1,398 | 573
Pipelines and related assets |  |
Property Subject to or Available for Operating Lease [Line Items] |  |
Total | 266 | 253
Barges and towing vessels |  |
Property Subject to or Available for Operating Lease [Line Items] |  |
Total | 619 | 491
Terminals and related assets |  |
Property Subject to or Available for Operating Lease [Line Items] |  |
Total | 1,178 | 822
Refineries and related assets [Member] |  |
Property Subject to or Available for Operating Lease [Line Items] |  |
Total | 938 | 0
Land, building, office equipment and other |  |
Property Subject to or Available for Operating Lease [Line Items] |  |
Total | 162 | 44
Construction-in-progress |  |
Property Subject to or Available for Operating Lease [Line Items] |  |
Total | $ 189 | $ 85

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