Revisions in Estimates (Tables)

3 Months Ended

Mar. 31, 2018

Large Project Construction [Member]

Change In Accounting Estimate [Line Items]

Schedule of Projects Summarized

The projects are summarized as follows:

		Three Months Ended March 31,
(dollars in millions)		2018			2017
Number of projects with downward estimate changes			2			5
Range of reduction in gross profit from each project, net	$	2.6 - 5.3		$	1.3 - 4.7
Decrease on project profitability	$	7.9		$	13.0