Accounts Receivable, Net of Allowance, and Contract Assets and Liabilities (Tables)

6 Months Ended

Jun. 30, 2018

Receivables [Abstract]

Schedule of Accounts Receivable, Net of Allowance, and Contract Assets

The following table provides details of accounts receivable, net of allowance and contract assets (together, “accounts receivable, net”) as of the dates indicated (in millions):

	June 30, 2018			December 31, 2017
Contract billings	$	561.6		$	683.9
Less allowance for doubtful accounts	(9.5		)	(8.2		)
Accounts receivable, net of allowance	$	552.1		$	675.7
Retainage	317.9			323.1
Costs and earnings in excess of billings	1,207.5			599.2
Retainage and costs and earnings in excess of billings (together, “contract assets”)	$	1,525.4		$	922.3
Accounts receivable, net	$	2,077.5		$	1,598.0