Property, Plants, and Equipment, Net

6 Months Ended

Jun. 30, 2018

Property, Plant and Equipment [Abstract]



	June 30, 2018		December 31, 2017
Land and land rights	$	139	$	140
Structures	2,376		2,395
Machinery and equipment	9,148		8,830
	11,663		11,365
Less: accumulated depreciation and amortization	6,674		6,392
	4,989		4,973
Construction work-in-progress	593		621
	$	5,582	$	5,594

During the second quarter of 2018, the Company updated its three-year strategic plan and determined that there was a decline in the forecasted financial performance for the disks operations, an asset group within the Arconic Engines business unit. As such, the Company evaluated the recoverability of the long-lived assets by comparing their carrying value of approximately $515 to the estimated undiscounted net cash flows of the disk operations, resulting in an estimated fair value in excess of their carrying value of approximately 13%; thus, there was no impairment. If the disks operations do not achieve the revised forecasted financial performance or if there are changes in any significant assumptions, a material non-cash impairment of long-lived assets may occur in future periods. These significant assumptions include sales growth, cost of raw materials, ramp up of additional production capacity, and working capital. A 1% decrease in the forecasted net cash flows would reduce the undiscounted cash flows by approximately $6. The Company also performed an interim impairment evaluation of goodwill for the Arconic Engines reporting unit as a result of the decline in the forecasted performance of the disks operations during the second quarter of 2018. The estimated fair value of the reporting unit was substantially in excess of the carrying value; thus, there was no impairment of goodwill.