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Revenue Contract Balances (Details) - USD ($) $ in Millions | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2018 | Jan. 01, 2018 | Dec. 31, 2017
Disaggregation of Revenue [Line Items] |  |  |  |
Accounts and notes receivable - trade | [1] | $ 5,766 | $ 87 | $ 3,976
Contract assets - current | [2] | 46 | 40 | 0
Deferred revenue recognized during the period |  | 1,906 |  |
Accrued and Other Current Liabilities [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Deferred Revenue | [3] | 334 | 2 | 2,014
Other noncurrent obligations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Deferred Revenue | [4] | $ 38 | $ 0 | $ 48
[1] | Included in accounts and notes receivable - net in the Consolidated Balance Sheets.
[2] | Included in other current assets in the Consolidated Balance Sheets.
[3] | Included in accrued and other current liabilities in the Consolidated Balance Sheets.
[4] | Included in other noncurrent obligations in the Consolidated Balance Sheets.

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- Definition Accounts and notes receivable - trade (does not include Other AR), net of allowance for doubtful accounts + References No definition available. + Details
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- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130531-203044 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130533-203044 + Details
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- Definition Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References No definition available. + Details
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