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Revenues and Accounts Receivable - Narrative (Details) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2020 | Dec. 31, 2019
Minimum Volume Commitments [Line Items] |  |
Counterparty deficiencies billed | $ 302 | $ 354
General payment terms | 30 days |
Substantially all trade accounts receivable, net, maximum age of balances past their scheduled invoice date | 30 days | 30 days
Minimum Volume Commitments |  |
Minimum Volume Commitments [Line Items] |  |
Counterparty deficiencies | $ 50 | $ 42
Counterparty deficiencies billed | 19 | 22
Counterparty deficiencies unbilled and uncollected | $ 31 | $ 20

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- Definition Description of payment terms in contract with customer. Includes, but is not limited to, timing of payment, existence of financing component, variability of consideration and constraint on variable consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045 + Details
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