Segments and Related Information (Schedule of Segment Reporting Information, by Segment - EBITDA) (Details) (Continuing Operations [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
EBITDA	$ 71.6	$ 73.5
Operating Segments [Member] | Communications [Member]
Segment Reporting Information [Line Items]
EBITDA	43.4	46.4
Operating Segments [Member] | Oil and Gas [Member]
Segment Reporting Information [Line Items]
EBITDA	34.9	42.4
Operating Segments [Member] | Electrical Transmission [Member]
Segment Reporting Information [Line Items]
EBITDA	3.5	3.4
Operating Segments [Member] | Power Generation and Industrial [Member]
Segment Reporting Information [Line Items]
EBITDA	0.5	(0.2)
Operating Segments [Member] | Other Segments [Member]
Segment Reporting Information [Line Items]
EBITDA	0.2	0.1
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
EBITDA	$ (10.9)	$ (18.6)