Segments and Related Information (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 segment	Jun. 30, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]
Number of reportable segments			5
Revenue	$ 1,104,556,000	$ 977,624,000	$ 2,068,585,000	$ 1,896,272,000
Property and equipment, net	618,672,000		618,672,000		488,132,000
Intangible assets and goodwill, net	1,213,700,000		1,213,700,000		1,067,700,000
Reportable Geographical Components [Member] | United States [Member]
Segment Reporting Information [Line Items]
Revenue	990,000,000	936,200,000	1,800,000,000	1,800,000,000
Property and equipment, net	495,000,000		495,000,000		436,900,000
Intangible assets and goodwill, net	1,000,000,000		1,000,000,000		1,000,000,000
Reportable Geographical Components [Member] | Foreign Operations [Member]
Segment Reporting Information [Line Items]
Revenue	114,600,000	41,400,000	240,600,000	81,200,000
Property and equipment, net	123,700,000		123,700,000		51,200,000
Intangible assets and goodwill, net	204,500,000		204,500,000		92,900,000
Communications [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Revenue	$ 528,100,000	$ 496,600,000	$ 975,200,000	$ 921,600,000
Communications [Member] | Utilities [Member] | Customer Concentration Risk [Member] | Revenue [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Utilities customers, percentage of consolidated communications revenue	6.30%	6.50%	6.60%	7.30%