Commitments And Contingencies (Narrative) (Details)	0 Months Ended		12 Months Ended							1 Months Ended	12 Months Ended
	Jan. 24, 2014 USD ($)	Jan. 24, 2014 INR	Dec. 31, 2013 USD ($) sites	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2013 Television And Radio Broadcast [Member]	Dec. 31, 2013 Wireless Communications [Member]	Dec. 31, 2013 International [Member]	Dec. 31, 2013 At T Transaction [Member] USD ($) term sites	Dec. 31, 2000 ALLTEL Transaction [Member]	Dec. 31, 2013 ALLTEL Transaction [Member] USD ($) sites
Loss Contingencies [Line Items]
Aggregate rent expense			$ 495,200,000	$ 419,000,000	$ 366,100,000
Tenant lease, initial term maximum, years						20 years	10 years
Tenant lease, initial term minimum, years						10 years	5 years
Tenant leases, initial term of contract								10 years
Leased assets, number of units									2,450		1,800
Average lease term (in years)									27	15
Aggregate purchase option price for towers									597,900,000		71,200,000
Purchase price accretion rate (per year)									10.00%		3.00%
Successive terms to renew lease									4
Renewal term									5 years
Purchase price of tower in shares of common stock											769
Value of potential shares payable											109,000,000
Cash purchase price per tower											27,500
India tax assessment	$ 369,000,000	22,600,000,000
Purchased subleased towers, number of units			4