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Impairments	6 Months Ended
Impairments	Jun. 30, 2018
Property, Plant and Equipment [Abstract]
Impairments	Impairments In the Current Quarter, we have determined that certain of our other fixed assets will either be sold or disposed before the end of their useful lives indicating the carrying value may not be recoverable. As a result, we recognized an impairment loss of $42 million in the Current Quarter for the difference between the carrying amount and fair value of the assets.