ACCOUNTS RECEIVABLE - NET (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Accounts Receivable, Net, Current [Abstract]
Trade	$ 7,499	$ 7,705
Less - Allowance for doubtful accounts	(192)	(197)
Accounts receivable, Net	7,307	7,508
Accounts Notes And Other Receivables Paragraph Details [Abstract]
Unbilled contracts receivable	$ 1,696	$ 1,543

No definition available.

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- Definition

Amounts due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer) for goods or services (including trade receivables) that have been delivered or sold in the normal course of business.

+ References

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Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

+ References

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-Topic 606
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- Definition

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

+ References

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- Definition

Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet.

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