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Inventories Table - Inventory Balances (Details) - USD ($) $ in Millions | Jun. 30, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Inventory, Net [Abstract] |  |  |  |
Other Inventory, Supplies, Gross | $ 452 | $ 448 |  |
Natural gas, NGLs, and refined products | 774 | 833 |  |
Energy Related Inventory, Crude Oil, Products and Merchandise | 367 | 251 |  |
Inventory, Net | $ 1,593 | $ 1,532 | [1] | $ 1,372
[1] | *As adjusted. See Note 1.

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