<SEC-DOCUMENT>0001053507-19-000101-index.html : 20190731
<SEC-HEADER>0001053507-19-000101.hdr.sgml : 20190731
<ACCEPTANCE-DATETIME>20190731070450
ACCESSION NUMBER:		0001053507-19-000101
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		16
CONFORMED PERIOD OF REPORT:	20190731
ITEM INFORMATION:		Results of Operations and Financial Condition
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20190731
DATE AS OF CHANGE:		20190731

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AMERICAN TOWER CORP /MA/
		CENTRAL INDEX KEY:			0001053507
		STANDARD INDUSTRIAL CLASSIFICATION:	REAL ESTATE INVESTMENT TRUSTS [6798]
		IRS NUMBER:				650723837
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14195
		FILM NUMBER:		19987324

	BUSINESS ADDRESS:	
		STREET 1:		116 HUNTINGTON AVE
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116
		BUSINESS PHONE:		6173757500

	MAIL ADDRESS:	
		STREET 1:		116 HUNTINGTON AVE
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	AMERICAN TOWER SYSTEMS CORP
		DATE OF NAME CHANGE:	19980128
</SEC-HEADER>
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<TYPE>8-K
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<FILENAME>a8-kq22019earningsxbrl.htm
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Document 1 - file: a8-kq22019earningsxbrl.htm

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<DOCUMENT>
<TYPE>EX-99.1
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<FILENAME>pressreleaseq22019.htm
<DESCRIPTION>EXHIBIT 99.1
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Document 2 - file: pressreleaseq22019.htm

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<DOCUMENT>
<TYPE>EX-101.SCH
<SEQUENCE>3
<FILENAME>amt-20190731.xsd
<DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
<TEXT>
Document 3 - file: amt-20190731.xsd

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<TYPE>EX-101.CAL
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<FILENAME>amt-20190731_cal.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT
<TEXT>
Document 4 - file: amt-20190731_cal.xml

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Document 5 - file: amt-20190731_def.xml

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<TYPE>EX-101.LAB
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<FILENAME>amt-20190731_lab.xml
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<TEXT>
Document 6 - file: amt-20190731_lab.xml

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Document 10 - file: R1.htm

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<DOCUMENT>
<TYPE>EXCEL
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<FILENAME>Financial_Report.xlsx
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<TEXT>
Document 11 - file: Financial_Report.xlsx

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Document 12 - file: Show.js

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<TYPE>XML
<SEQUENCE>13
<FILENAME>report.css
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<TEXT>
Document 13 - file: report.css

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<DOCUMENT>
<TYPE>XML
<SEQUENCE>14
<FILENAME>FilingSummary.xml
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<TEXT>
Document 14 - file: FilingSummary.html

Document 14 - RAW XML: FilingSummary.xml

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<DOCUMENT>
<TYPE>JSON
<SEQUENCE>17
<FILENAME>MetaLinks.json
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 17 - file: MetaLinks.json

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<DOCUMENT>
<TYPE>ZIP
<SEQUENCE>18
<FILENAME>0001053507-19-000101-xbrl.zip
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