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Commitments and Contingencies (Details) (USD $)
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12 Months Ended | ||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Accretion expense related to liabilities for contingent retirement obligations | $ 8,100,000 | $ 6,500,000 | $ 5,600,000 |
| Asset retirement obligation | 118,400,000 | 95,000,000 | |
| Asset retirement obligation future outlay | 1,200,000,000 | ||
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Sprint [Member]
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| Taxes, Other | 27,700,000 | ||
| Estimated future property tax commitment | 43,700,000 | ||
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ATT, TMO, WCP, and NextG Acquisitions [Member]
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| Increase (Decrease) in Asset Retirement Obligations | $ 16,300,000 | $ 21,100,000 | |
| X | ||||||||||
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- Definition
Estimated future property tax commitment. No definition available.
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| X | ||||||||||
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- Definition
This disclosure represents the estimated future undiscounted cash flows expected to be paid relating to asset retirement obligations No definition available.
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| X | ||||||||||
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- Definition
The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The increase (decrease) during the reporting period in the carrying amount of asset retirement obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Taxes, excluding payroll, income and excise taxes, if not included elsewhere, that could include production, real and personal property, and other selling and distribution-related taxes. No definition available.
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