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Acquisitions (Narrative) (Details)	9 Months Ended		3 Months Ended	9 Months Ended
	Sep. 30, 2014 USD ($)	Sep. 29, 2014 BRL	Sep. 30, 2014 Other Acquisitions [Member] item	Sep. 30, 2014 Subsequent Event [Member] USD ($) item
Business Acquisition [Line Items]
Number of towers acquired			94	52
Number of towers, acquired right to use			4
Cash paid for acquisition				$ 40,600,000
Foreign currency forward contracts		1,170,000,000
Foreign currency floor price		2.4
Foreign currency ceiling price		2.5665
Gain (loss) on derivative	$ 0

X

- Definition

The amount of foreign currency that the entity has contractually agreed, or for which it has the option, to buy or sell with respect to the contract being described.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

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- Definition

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- Definition

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+ References

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- Definition

Number of towers acquired.

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- Definition

Number Of Towers, Acquired Rights To Use

+ References

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X

- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5618551-113959



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (a),(c),(d),(e)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

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