Accounts Receivable, Net of Allowance (Tables)

9 Months Ended

Sep. 30, 2012

Receivables [Abstract]

Schedule Of Accounts Receivable

Accounts receivable, net of allowance, which is classified as current, is composed of the following as of the dates indicated (in millions):

	September 30, 2012			December 31, 2011
Contract billings	$	486.2		$	389.8
Retainage	105.5			41.7
Costs and earnings in excess of billings	289.0			228.7
Accounts receivable, gross	$	880.7		$	660.2
Less allowance for doubtful accounts	(7.6		)	(7.6		)
Accounts receivable, net	$	873.1		$	652.6