Accounts Receivable, net (Tables)

12 Months Ended

Dec. 31, 2013

Receivables [Abstract]

Accounts Receivable, Net

Accounts receivable, net consists of the following:

	December 31, 2013			December 31, 2012
Trade receivables(1)(2)(3)	$	544.2		$	415.9
Other	6.8			9.1
Less: allowance for doubtful accounts	(0.2		)	(4.3		)
Accounts receivable, net	$	550.8		$	420.7

_______________________________________

(1) Includes unbilled receivables of $33.5 and $25.6 at December 31, 2013 and December 31, 2012, respectively.

(2) Includes $135.1 and $102.0 held in retainage at December 31, 2013 and December 31, 2012, respectively.

(3) Includes $24.6 of withheld payments by a customer pending completion of retrofit work.