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Cash And Cash Equivalents Net Change in Operating Assets and Liabilities (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019 | Dec. 31, 2018
Supplemental Cash Flow Elements [Abstract] |  |  |  |  |  |
Accounts receivable |  | $ 2,084 | $ (340) |  |  |
Accounts receivable from related companies |  | 111 | (1) |  |  |
Inventories |  | (180) | 28 |  |  |
Other current assets |  | 146 | 30 |  |  |
Other non-current assets, net |  | (226) | (44) |  |  |
Accounts payable |  | (2,108) | 199 |  |  |
Accounts payable to related companies |  | (8) | (49) |  |  |
Accrued and other current liabilities |  | (116) | (89) |  |  |
Other non-current liabilities |  | 42 | (87) |  |  |
Derivative assets and liabilities, net |  | 190 | 140 |  |  |
Net change in operating assets and liabilities, net of effects of acquisitions | $ (66) | $ 65 | $ 213 | [1] | $ 444 | $ (234)
[1] | *As adjusted. See Note 1.

X
- Definition The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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