Basis of Presentation (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Ground Lease Agreement Initial Term	5 years
Subject to Capital Lease with Sprint, TMO, or AT&T [Member]
Tower count as a percentage of total towers	53.00%
Leased or Operated Under Sprint Agreement [Member]
Ground Lease Agreement Initial Term	32
Purchase Option Price	$ 2,300.0
Tower count as a percentage of total towers	16.00%
Leased or Operated Under T-Mobile Agreement [Member]
Ground Lease Agreement Initial Term	28
Tower count as a percentage of total towers	15.00%
T-Mobile [Member]
Purchase Option Price	2,000.0
AT&T lease or sublease in accordance with TMO Agreement [Member]
Purchase Option Price	10.0
Tower count as a percentage of total towers	1.00%
AT&T Transaction, Leased and Operated Sites [Member]
Tower count as a percentage of total towers	22.00%
AT&T [Member]
Ground Lease Agreement Initial Term	28
Purchase Option Price	4,200.0
Tower count as a percentage of total towers	24.00%
AT&T Prior to 2025 [Member]
Purchase Option Price	$ 405.0
CCUSA [Member]
Tower Count	39,600
Tower count as a percentage of total towers	96.00%
CCAL [Member]
Tower Count	1,700
Tower count as a percentage of total towers	4.00%