REVENUES - Narrative (Details) - USD ($) $ in Billions	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
Revenue [abstract]
Revenue from sale of goods	$ 14.5	$ 14.7
Revenue from rendering of services	25.1	8.4
Revenue from other activities	$ 1.2	$ 1.3

The amount of revenue arising from sources that the entity does not separately disclose in the same statement or note. [Refer: Revenue]

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- References

No definition available.

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- Definition

The amount of revenue arising from the rendering of services. [Refer: Revenue]

+ References

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- Definition

The amount of revenue arising from the sale of goods. [Refer: Revenue]

+ References

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