Concentrations of Risk (Tables)

9 Months Ended

Sep. 30, 2012

Risks and Uncertainties [Abstract]

Schedule Of Customer Revenues By Industry

Customer revenue by industry from continuing operations for the periods indicated is as follows (in millions):

	Three Months Ended September 30,								Nine Months Ended September 30,
	2012				2011				2012				2011
Communications	$	436.8	41	%	$	435.8	53	%	$	1,164.7	42	%	$	1,101.6	52	%
Utilities	627.3		59	%	373.4		46	%	1,617.8		58	%	981.1		47	%
Government	3.2		0	%	7.0		1	%	11.9		0	%	17.0		1	%
	$	1,067.3	100	%	$	816.2	100	%	$	2,794.4	100	%	$	2,099.7	100	%

Schedule Of Major Customers, By Revenue Concentration

Revenue concentration information, as a percent of total consolidated revenue from continuing operations, is as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
Revenue from top ten customers	67	%	73	%	66	%	73	%
Revenue from specific customers:
AT&T	17	%	23	%	17	%	25	%
DIRECTV®	16	%	22	%	17	%	19	%