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ACCOUNTS RECEIVABLES | 12 Months Ended
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Dec. 31, 2020
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract] |
Accounts, Notes and Other Receivables |
| December 31,
2020 |  | 2019
Trade | $ | 7,029 |  |  | $ | 7,639 |
Less—Allowance for doubtful accounts | (202) |  |  | (146) |
| $ | 6,827 |  |  | $ | 7,493 |
Trade Receivables includes $1,589 million and $1,586 million of unbilled balances under long-term contracts as of December 31, 2020 and 2019. These amounts are billed in accordance with the terms of customer contracts to which they relate.

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- Definition The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2196772 + Details
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