Operating Information by Segment and Geographic Area (Tables)

3 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Schedule of operating information and assets by reportable segment

Segment profit is calculated as revenue less cost of revenue and earnings attributable to noncontrolling interests excluding: corporate general and administrative expense; interest expense; interest income; domestic and foreign income taxes; and other non-operating income and expense items.

	Three Months Ended March 31,
Segment Profit (Loss) (in millions)	2019		2018
Energy & Chemicals	$	19.4	$	105.7
Mining, Industrial, Infrastructure & Power	0.4		(120.4		)
Government	16.6		48.2
Diversified Services	10.2		18.8
Total segment profit	$	46.6	$	52.3

Operating information by reportable segment is as follows:

	Three Months Ended March 31,
External Revenue (in millions)	2019		2018
Energy & Chemicals	$	1,476.6	$	1,943.0
Mining, Industrial, Infrastructure & Power	1,381.2		907.0
Government	784.7		1,330.5
Diversified Services	550.2		643.3
Total external revenue	$	4,192.7	$	4,823.8

Total assets by segment are as follows:

Total Assets by Segment (in millions)	March 31, 2019		December 31, 2018
Energy & Chemicals	$	1,497.1	$	1,525.1
Mining, Industrial, Infrastructure & Power	1,229.6		1,193.2
Government	882.6		948.2
Diversified Services	1,865.8		1,841.0

Schedule of Reconciliation of Total Segment Profit to Earnings (Loss) Before Taxes

A reconciliation of total segment profit to earnings before taxes is as follows:

Reconciliation of Total Segment Profit to Earnings (Loss) Before Taxes	Three Months Ended March 31,
(in millions)	2019			2018
Total segment profit	$	46.6		$	52.3
Corporate general and administrative expense	(61.0		)	(57.3		)
Restructuring and other exit costs	(27.4		)	—
Interest income (expense), net	(5.7		)	(9.6		)
Earnings attributable to noncontrolling interests	15.1			5.5
Earnings (loss) before taxes	$	(32.4	)	$	(9.1	)

Schedule of Revenues from External Customers and Assets by Geographical Areas Table [Text Block]

The following table presents revenue disaggregated by the geographic area where the work was performed for the three months ended March 31, 2019 and 2018:

	Three Months Ended March 31,
External Revenue (in millions)	2019		2018
United States	$	1,670.5	$	2,319.0
Canada	195.5		75.7
Asia Pacific (includes Australia)	430.2		231.7
Europe	928.3		1,185.8
Central and South America	543.1		541.0
Middle East and Africa	425.1		470.6
Total external revenue	$	4,192.7	$	4,823.8