SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - ASSET RETIREMENT OBLIGATIONS (Details) - USD ($) $ in Millions |
Dec. 31, 2018 |
Dec. 31, 2017 |
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| ASSET RETIREMENT OBLIGATIONS | ||
| Asset retirement obligations | $ 11 | $ 9 |
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- References No definition available.
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- Definition Noncurrent portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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