Revisions in Estimates (Tables)

6 Months Ended

Jun. 30, 2014

Construction [Member]

Change in Accounting Estimate [Line Items]

Schedule of Change in Accounting Estimate

The projects are summarized as follows:

Increases

	Three Months Ended June 30,						Six Months Ended June 30,
(dollars in millions)			2014		2013		2014		2013
Number of projects with upward estimate changes			—		1		—		2
Range of increase in gross profit from each project, net		$	—	$	1.6	$	—	$	1.4 - 1.7
Increase on project profitability		$	—	$	1.6	$	—	$	3.1

Decreases

	Three Months Ended June 30,						Six Months Ended June 30,
(dollars in millions)			2014		2013		2014		2013
Number of projects with downward estimate changes			1		1		5		2
Reduction in gross profit from each project, net		$	1.4	$	2.1	$	1.1 - 2.2	$	1.0 - 2.4
Decrease on project profitability		$	1.4	$	2.1	$	8.3	$	3.4

Large Project Construction [Member]

Change in Accounting Estimate [Line Items]

Schedule of Change in Accounting Estimate

revisions in estimates, both increases and decreases, that individually had an impact of $1.0 million or more on gross profit were net increases of $25.7 million and $34.5 million for the three and six months ended June 30, 2014, respectively. The net changes for the three and six months ended June 30, 2013 were net increases of $8.7 million and $17.9 million, respectively. Amounts attributable to non-controlling interests were $8.2 million and $7.5 million of the net increases for the three and six months ended June 30, 2014, respectively, and were $0.4 million and $1.4 million for the three and six months ended June 30, 2013, respectively. The projects are summarized as follows:

Increases

	Three Months Ended June 30,						Six Months Ended June 30,
(dollars in millions)			2014		2013		2014		2013
Number of projects with upward estimate changes			6		5		9		5
Range of increase in gross profit from each project, net		$	1.1 - 19.7	$	1.3 - 8.3	$	1.1 - 16.3	$	1.5 - 16.1
Increase on project profitability		$	28.0	$	15.8	$	41.3	$	31.9

Decreases

	Three Months Ended June 30,						Six Months Ended June 30,
(dollars in millions)			2014		2013		2014		2013
Number of projects with downward estimate changes			1		2		1		2
Range of reduction in gross profit from each project, net		$	2.3	$	2.8 - 4.3	$	6.8	$	5.2 - 8.8
Decrease on project profitability		$	2.3	$	7.1	$	6.8	$	14.0