$AMT
AMERICAN TOWER CORP /MA/ Stock $amt

$amt Overview Financials Valuation SEC Filings Company Website

2011 Q4 Form 10-Q Financial Statement

#000119312511291078 Filed on November 02, 2011

Income Statement

Concept	2011 Q4	2011 Q3	2010 Q4
Revenue	$653.2M	$630.4M	$547.6M
YoY Change	19.27%	22.81%	22.24%
Cost Of Revenue	$165.6M	$8.668M	$132.9M
YoY Change	24.6%	14.31%	23.63%
Gross Profit	$487.6M	$621.7M	$414.7M
YoY Change	17.58%	22.94%	21.79%
Gross Profit Margin	74.65%	98.63%	75.72%
Selling, General & Admin	$73.90M	$76.48M	$65.40M
YoY Change	13.0%	33.48%	41.25%
% of Gross Profit	15.16%	12.3%	15.77%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$143.6M	$142.1M	$124.1M
YoY Change	15.71%	23.14%	16.31%
% of Gross Profit	29.45%	22.86%	29.93%
Operating Expenses	$239.9M	$76.48M	$211.3M
YoY Change	13.54%	33.48%	38.01%
Operating Profit	$247.7M	$228.3M	$203.4M
YoY Change	21.77%	7.0%	8.56%
Interest Expense	-$110.6M	$77.80M	-$61.30M
YoY Change	80.42%	23.67%	5.87%
% of Operating Profit	-44.64%	34.08%	-30.13%
Other Income/Expense, Net	$22.30M	-$223.4M	-$3.500M
YoY Change	-737.14%	354.62%	-1850.0%
Pretax Income	$159.5M	$4.953M	$136.8M
YoY Change	16.59%	-96.98%	27.97%
Income Tax	-$36.90M	$24.68M	$53.10M
% Of Pretax Income	-23.13%	498.3%	38.82%
Net Earnings	$205.1M	-$15.70M	$83.51M
YoY Change	145.6%	-116.8%	29.68%
Net Earnings / Revenue	31.4%	-2.49%	15.25%
Basic Earnings Per Share	$0.52	-$0.04	$0.21
Diluted Earnings Per Share	$0.52	-$0.04	$0.21
COMMON SHARES
Basic Shares Outstanding	393.0M shares	395.2M shares
Diluted Shares Outstanding		395.2M shares

Balance Sheet

Concept	2011 Q4	2011 Q3	2010 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$352.0M	$182.0M	$930.0M
YoY Change	-62.15%	-56.14%	261.87%
Cash & Equivalents	$330.2M	$177.5M	$884.0M
Short-Term Investments	$22.00M	$5.000M	$46.00M
Other Short-Term Assets	$241.0M	$228.6M	$145.6M
YoY Change	65.52%	-47.57%	-55.88%
Inventory
Prepaid Expenses	$28.03M		$72.97M
Receivables	$100.6M	$100.1M	$81.48M
Other Receivables	$81.00M	$0.00	$0.00
Total Short-Term Assets	$775.2M	$813.8M	$1.408B
YoY Change	-44.96%	-13.79%	115.0%
LONG-TERM ASSETS
Property, Plant & Equipment	$4.982B	$4.126B	$3.683B
YoY Change	35.25%	18.08%	16.2%
Goodwill	$2.676B	$2.674B	$2.512B
YoY Change	6.54%		11.61%
Intangibles	$2.495B	$2.208B	$1.886B
YoY Change	32.3%		18.26%
Long-Term Investments
YoY Change
Other Assets	$495.6M	$336.1M	$317.8M
YoY Change	55.95%	253.77%	31.33%
Total Long-Term Assets	$11.47B	$10.08B	$8.962B
YoY Change	27.96%	18.54%	13.95%
TOTAL ASSETS
Total Short-Term Assets	$775.2M	$813.8M	$1.408B
Total Long-Term Assets	$11.47B	$10.08B	$8.962B
Total Assets	$12.24B	$10.90B	$10.37B
YoY Change	18.05%	15.31%	21.71%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$215.9M	$353.0M	$67.12M
YoY Change	221.69%	43.5%	-63.72%
Accrued Expenses	$305.5M	$62.00M	$222.7M
YoY Change	37.21%	24.0%	827.85%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$101.8M	$861.0M	$74.90M
YoY Change	35.94%	381.01%	5.49%
Total Short-Term Liabilities	$781.5M	$1.371B	$539.5M
YoY Change	44.87%	122.98%	37.97%
LONG-TERM LIABILITIES
Long-Term Debt	$7.134B	$4.971B	$5.512B
YoY Change	29.42%	7.46%	33.12%
Other Long-Term Liabilities	$572.1M	$805.6M	$471.7M
YoY Change	21.27%	6.85%	-29.59%
Total Long-Term Liabilities	$7.707B	$805.6M	$5.984B
YoY Change	28.78%	-85.03%	24.39%
TOTAL LIABILITIES
Total Short-Term Liabilities	$781.5M	$1.371B	$539.5M
Total Long-Term Liabilities	$7.707B	$805.6M	$5.984B
Total Liabilities	$8.832B	$7.548B	$6.866B
YoY Change	28.65%	25.84%	31.9%
SHAREHOLDERS EQUITY
Retained Earnings	-$1.478B	-$1.545B	-$1.737B
YoY Change	-14.9%
Common Stock	$3.936M	$4.884M	$4.860M
YoY Change	-19.01%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$0.00	$3.775B	$3.382B
YoY Change	-100.0%
Treasury Stock Shares	0.000 shares	94.97M shares	87.38M shares
Shareholders Equity	$3.287B	$3.263B	$3.501B
YoY Change
Total Liabilities & Shareholders Equity	$12.24B	$10.90B	$10.37B
YoY Change	18.05%	15.31%	21.71%

Cashflow Statement

Concept	2011 Q4	2011 Q3	2010 Q4
OPERATING ACTIVITIES
Net Income	$205.1M	-$15.70M	$83.51M
YoY Change	145.6%	-116.8%	29.68%
Depreciation, Depletion And Amortization	$143.6M	$142.1M	$124.1M
YoY Change	15.71%	23.14%	16.31%
Cash From Operating Activities	$315.9M	$290.7M	$246.4M
YoY Change	28.21%	12.59%	27.87%
INVESTING ACTIVITIES
Capital Expenditures	-$125.9M	-$160.5M	-$118.2M
YoY Change	6.51%	67.19%	74.08%
Acquisitions
YoY Change
Other Investing Activities	-$1.105B	-$341.8M	-$323.5M
YoY Change	241.67%	-28.24%	147.32%
Cash From Investing Activities	-$1.231B	-$502.3M	-$441.7M
YoY Change	178.74%	-12.23%	122.29%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	1.082B	61.70M	710.3M
YoY Change	52.3%	-83.54%	2909.75%
NET CHANGE
Cash From Operating Activities	315.9M	290.7M	246.4M
Cash From Investing Activities	-1.231B	-502.3M	-441.7M
Cash From Financing Activities	1.082B	61.70M	710.3M
Net Change In Cash	166.5M	-149.9M	515.0M
YoY Change	-67.67%	-346.55%	2826.14%
FREE CASH FLOW
Cash From Operating Activities	$315.9M	$290.7M	$246.4M
Capital Expenditures	-$125.9M	-$160.5M	-$118.2M
Free Cash Flow	$441.8M	$451.2M	$364.6M
YoY Change	21.17%	27.39%	39.91%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Document Type DocumentType	10-Q
	dei	Amendment Flag AmendmentFlag	false
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2011
	dei	Document Period End Date DocumentPeriodEndDate	2011-09-30
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Entity Registrant Name EntityRegistrantName	AMERICAN TOWER CORP /MA/
	dei	Entity Central Index Key EntityCentralIndexKey	0001053507
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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CY2011Q3	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	50221000	USD
CY2011Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	100063000	USD
CY2011Q3	us-gaap	Other Assets Current OtherAssetsCurrent	228590000	USD
CY2011Q3	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	252699000	USD
CY2011Q3	us-gaap	Assets Current AssetsCurrent	813805000	USD
CY2011Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	4125887000	USD
CY2011Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	2208387000	USD
CY2011Q3	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	177423000	USD
CY2011Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	336082000	USD
CY2011Q3	us-gaap	Interest Payable Current InterestPayableCurrent	61536000	USD
CY2011Q3	us-gaap	Debt Current DebtCurrent	861160000	USD
CY2011Q3	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	95851000	USD
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CY2010Q4	us-gaap	Short Term Investments ShortTermInvestments	46428000	USD
CY2010Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	81479000	USD
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CY2010Q4	us-gaap	Goodwill Goodwill	2514539000	USD
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CY2010Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	5512492000	USD
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CY2011Q3	us-gaap	Minority Interest MinorityInterest	84351000	USD
CY2010Q4	us-gaap	Minority Interest MinorityInterest	3114000	USD
CY2011Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3347641000	USD
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CY2011Q3	us-gaap	Asset Retirement Obligation AssetRetirementObligation	400216000	USD
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CY2010Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	471735000	USD
CY2011Q3	us-gaap	Liabilities Liabilities	7547695000	USD
CY2010Q4	us-gaap	Liabilities Liabilities	6865526000	USD
CY2011Q3	us-gaap	Preferred Stock Value PreferredStockValue		USD
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CY2011Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-1545244000	USD
CY2011Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-87070000	USD
CY2011Q3	us-gaap	Treasury Stock Value TreasuryStockValue	3775087000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	1117939000	USD
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CY2010Q4	us-gaap	Preferred Stock Value PreferredStockValue		USD
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	us-gaap	Commitments And Contingencies2009 CommitmentsAndContingencies2009	0
CY2010	us-gaap	Commitments And Contingencies2009 CommitmentsAndContingencies2009	0
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CY2010Q4	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	470637000	USD
CY2011Q3	us-gaap	Common Stock Value CommonStockValue	4884000	USD
CY2010Q4	us-gaap	Common Stock Value CommonStockValue	4860000	USD
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CY2011Q3	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	614808000	USD
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CY2011Q3	us-gaap	Costs And Expenses CostsAndExpenses	402098000	USD
CY2011Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	228305000	USD
CY2011Q3	amt	Other Interest Income OtherInterestIncome	3498000	USD
CY2011Q3	us-gaap	Investment Income Interest InvestmentIncomeInterest	1822000	USD
CY2011Q3	us-gaap	Interest Expense InterestExpense	77796000	USD
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CY2011Q3	us-gaap	Profit Loss ProfitLoss	-19726000	USD
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	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	1745302000	USD
	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	45031000	USD
	us-gaap	Sales Revenue Net SalesRevenueNet	1790333000	USD
	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	432454000	USD
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CY2010Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	70649000	USD
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	amt	Other Interest Income OtherInterestIncome	10587000	USD
	us-gaap	Investment Income Interest InvestmentIncomeInterest	6837000	USD
	us-gaap	Interest Expense InterestExpense	226735000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-115710000	USD
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	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	161981000	USD
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	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	185406000	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
	us-gaap	Profit Loss ProfitLoss	185406000	USD
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	us-gaap	Net Income Loss NetIncomeLoss	191352000	USD
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	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	396507000	shares
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CY2010Q3	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	4299000	USD
CY2010Q3	us-gaap	Costs And Expenses CostsAndExpenses	299950000	USD
CY2010Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	213372000	USD
CY2010Q3	amt	Other Interest Income OtherInterestIncome	3585000	USD
CY2010Q3	us-gaap	Investment Income Interest InvestmentIncomeInterest	1954000	USD
CY2010Q3	us-gaap	Profit Loss ProfitLoss	93601000	USD
CY2010Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	162000	USD
CY2010Q3	us-gaap	Net Income Loss NetIncomeLoss	93439000	USD
CY2010Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.23
CY2010Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.23
CY2010Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.23
CY2010Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.23
CY2010Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	400602000	shares
CY2010Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	403455000	shares
	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	1400120000	USD
	us-gaap	Net Income Loss NetIncomeLoss	289422000	USD
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.72
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.72
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2010Q3	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	8933000	USD
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.48
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	481000	USD
	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	5531000	USD
	us-gaap	Sales Revenue Net SalesRevenueNet	1437693000	USD
	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	321587000	USD
	us-gaap	Cost Of Services CostOfServices	20054000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	336621000	USD
	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	164404000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	14090000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	856756000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	580937000	USD
	amt	Other Interest Income OtherInterestIncome	10669000	USD
	us-gaap	Investment Income Interest InvestmentIncomeInterest	3150000	USD
	us-gaap	Interest Expense InterestExpense	177395000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1913000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-161698000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	419239000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	129390000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	24000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	289873000	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	30000	USD
	us-gaap	Profit Loss ProfitLoss	289903000	USD
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.71
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.71
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	401887000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	405053000	shares
	us-gaap	Operating Income Loss OperatingIncomeLoss	672394000	USD
	amt	Other Interest Expense OtherInterestExpense	1186000	USD
	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	0	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	40146000	USD
	amt	Other Interest Expense OtherInterestExpense	1115000	USD
	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	-19000	USD
CY2010Q3	us-gaap	Share Based Compensation ShareBasedCompensation	13353000	USD
CY2010Q3	amt	Other Interest Expense OtherInterestExpense	371000	USD
CY2010Q3	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	0	USD
CY2011Q3	amt	Other Interest Expense OtherInterestExpense	458000	USD
CY2011Q3	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	0	USD
CY2011Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2010Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-35000	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2011Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2010Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2011Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2010Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	58891000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	58809000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	849998000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-706457000	USD
	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	397088000	USD
	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	9168000	USD
	us-gaap	Increase Decrease In Restricted Cash For Operating Activities IncreaseDecreaseInRestrictedCashForOperatingActivities	825000	USD
CY2011Q3	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	-145144000	USD
	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	-101505000	USD
	us-gaap	Adjustments Noncash Items To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities Other AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesOther	144674000	USD
	amt	Increase Decrease In Deferred Rent IncreaseDecreaseInDeferredRent	49404000	USD
	us-gaap	Increase Decrease In Restricted Cash For Operating Activities IncreaseDecreaseInRestrictedCashForOperatingActivities	2994000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	56555000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	72228000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	774619000	USD
	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	228480000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	584270000	USD
	amt	Proceeds From Sale Of Available For Sale Securities And Other Productive Assets ProceedsFromSaleOfAvailableForSaleSecuritiesAndOtherProductiveAssets	9340000	USD
	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	36425000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	19325000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-859160000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-6214000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	22921000	USD
	us-gaap	Interest Paid InterestPaid	144239000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	36185000	USD
	us-gaap	Adjustments Noncash Items To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities Other AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesOther	287286000	USD
	amt	Increase Decrease In Deferred Rent IncreaseDecreaseInDeferredRent	69874000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	1220572000	USD
	amt	Proceeds From Sale Of Available For Sale Securities And Other Productive Assets ProceedsFromSaleOfAvailableForSaleSecuritiesAndOtherProductiveAssets	65223000	USD
	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	20412000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-13218000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1559631000	USD
	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	101128000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	79601000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	48808000	USD
	us-gaap	Interest Paid InterestPaid	195877000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	391098000	USD
	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	60926000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	350452000	USD
	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	122342000	USD
CY2009Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	247293000	USD
CY2010Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	371878000	USD
	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-1089000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	124585000	USD
	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	207120000	USD
	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	722031000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	4265000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	199958000	USD
	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	80814000	USD
CY2010Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	2853000	shares
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	191352000	USD
	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	0	USD
	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	5060000	USD
	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	1641000	USD
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	4495000	USD
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	4003000	USD
	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	280014000	USD
	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	457153000	USD
	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	699160000	USD
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	381000	USD
	amt	Minority Interest Increase From Contributions From Noncontrolling Interest Holders MinorityInterestIncreaseFromContributionsFromNoncontrollingInterestHolders	87564000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease	-127209000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-86000	USD
	us-gaap	Other Comprehensive Income Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	-195000	USD
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	393121000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	86851000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	147009000	USD
	amt	Stock Issued During Period Value Stock Warrants Exercised StockIssuedDuringPeriodValueStockWarrantsExercised	6859000	USD
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	346153000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	6686000	USD
	us-gaap	Other Comprehensive Income Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	-89000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Period Increase Decrease OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease	30278000	USD
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	474000	USD
CY2010Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3453650000	USD
CY2009Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3318125000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	1977000	USD
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1327000	USD
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1887000	USD
	amt	Concentrations Of Credit Risk Revenues From Customers ConcentrationsOfCreditRiskRevenuesFromCustomers	0.53
	amt	Description Of Business Basis Of Presentation And Accounting Policies DescriptionOfBusinessBasisOfPresentationAndAccountingPolicies	<p style='margin-top:9pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;font-weight:bold;margin-left:-0.0500000000000007px;">1</font><font style="font-family:Times New Roman;font-size:10pt;font-weight:bold;">.       Description of Business, Basis of Presentation and Accounting Policies </font></p><p style='margin-top:4.5pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:24.5px;">American Tower Corporation is, </font><font style="font-family:Times New Roman;font-size:10pt;">through </font><font style="font-family:Times New Roman;font-size:10pt;">its</font><font style="font-family:Times New Roman;font-size:10pt;"> various</font><font style="font-family:Times New Roman;font-size:10pt;"> </font><font style="font-family:Times New Roman;font-size:10pt;">subsidiaries (collectively, </font><font style="font-family:Times New Roman;font-size:10pt;">“</font><font style="font-family:Times New Roman;font-size:10pt;">ATC</font><font style="font-family:Times New Roman;font-size:10pt;">”</font><font style="font-family:Times New Roman;font-size:10pt;"> or the </font><font style="font-family:Times New Roman;font-size:10pt;">“</font><font style="font-family:Times New Roman;font-size:10pt;">Company</font><font style="font-family:Times New Roman;font-size:10pt;">”)</font><font style="font-family:Times New Roman;font-size:10pt;">,</font><font style="font-family:Times New Roman;font-size:10pt;"> </font><font style="font-family:Times New Roman;font-size:10pt;">an independent owner, </font><font style="font-family:Times New Roman;font-size:10pt;">operator</font><font style="font-family:Times New Roman;font-size:10pt;"> and developer</font><font style="font-family:Times New Roman;font-size:10pt;"> of wireless and broadcast communications sites in the United States, </font><font style="font-family:Times New Roman;font-size:10pt;">Brazil, Chile, Colombia, </font><font style="font-family:Times New Roman;font-size:10pt;">Ghana</font><font style="font-family:Times New Roman;font-size:10pt;">, India, </font><font style="font-family:Times New Roman;font-size:10pt;">Mexico, Peru and South Africa</font><font style="font-family:Times New Roman;font-size:10pt;">. The Company's primary business is the leasing of antenna space on multi-tenant communications sites to wireless service providers and radio and television broadcast companies. The Company also manages rooftop and tower sites for property owners, operates in-building</font><font style="font-family:Times New Roman;font-size:10pt;"> and outdoor</font><font style="font-family:Times New Roman;font-size:10pt;"> distributed antenna system (</font><font style="font-family:Times New Roman;font-size:10pt;">“</font><font style="font-family:Times New Roman;font-size:10pt;">DAS</font><font style="font-family:Times New Roman;font-size:10pt;">”</font><font style="font-family:Times New Roman;font-size:10pt;">) networks</font><font style="font-family:Times New Roman;font-size:10pt;"> and provides network development services that </font><font style="font-family:Times New Roman;font-size:10pt;">primarily </font><font style="font-family:Times New Roman;font-size:10pt;">support its rental and management operations and the addition of new tenants and equipment on its sites. </font></p><p style='margin-top:9pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:24.5px;">ATC is a holding company that conducts its operations through its directly and indirectly owned subsidiaries</font><font style="font-family:Times New Roman;font-size:10pt;"> and its joint venture</font><font style="font-family:Times New Roman;font-size:10pt;">s</font><font style="font-family:Times New Roman;font-size:10pt;">. ATC's principal </font><font style="font-family:Times New Roman;font-size:10pt;">domestic</font><font style="font-family:Times New Roman;font-size:10pt;"> operating subsi</font><font style="font-family:Times New Roman;font-size:10pt;">diaries are American Towers </font><font style="font-family:Times New Roman;font-size:10pt;">LLC</font><font style="font-family:Times New Roman;font-size:10pt;"> (“ATI”)</font><font style="font-family:Times New Roman;font-size:10pt;"> and SpectraSite Communications, LLC (</font><font style="font-family:Times New Roman;font-size:10pt;">“</font><font style="font-family:Times New Roman;font-size:10pt;">SpectraSite</font><font style="font-family:Times New Roman;font-size:10pt;">”</font><font style="font-family:Times New Roman;font-size:10pt;">). ATC conducts its international operations through its subsidiary, American Tower International, Inc., which in turn conducts operations through its various international operating subsidiaries</font><font style="font-family:Times New Roman;font-size:10pt;">.</font><font style="font-family:Times New Roman;font-size:10pt;"> </font></p><p style='margin-top:9pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:24.5px;">The accompanying condensed consolidated financial statements have been prepared by the Company pursuant to the rules and regulations of the Securities and Exchange Commission (</font><font style="font-family:Times New Roman;font-size:10pt;">“</font><font style="font-family:Times New Roman;font-size:10pt;">SEC</font><font style="font-family:Times New Roman;font-size:10pt;">”</font><font style="font-family:Times New Roman;font-size:10pt;">). The financial information included herein is unaudited; however, the Company believes that all adjustments (consisting only of normal recurring adjustments) considered necessary for a fair presentation of the Company's financial position and results of operations for such periods have been included. Results of interim periods may not be indicative of results for the full year. Subsequent events have been evaluated up to the date of issuance of these financial statements. These condensed consolidated financial statements and related notes should be read in conjunction with the Company's Annual Report on Form 10-K for the year ended December 31, 2010. </font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:24.5px;">Principles of Consolidation and Basis of Presentation</font><font style="font-family:Times New Roman;font-size:10pt;">—</font><font style="font-family:Times New Roman;font-size:10pt;">The accompanying condensed consolidated financial statements include the accounts of the Company and those subsidiaries and joint ventures in which it has a controlling interest. Investments in entities that the Company does not control are accounted for using the equity or cost method, depending upon the Company's ability to exercise significant influence over operating and financial policies.</font></p><p style='margin-top:9pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:24.5px;">Significant Accounting Policies and Use of Estimates</font><font style="font-family:Times New Roman;font-size:10pt;">—The preparation of financial statements in conformity with accounting principles generally accepted in the United States (</font><font style="font-family:Times New Roman;font-size:10pt;">“</font><font style="font-family:Times New Roman;font-size:10pt;">GAAP</font><font style="font-family:Times New Roman;font-size:10pt;">”</font><font style="font-family:Times New Roman;font-size:10pt;">) requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Actual results may differ from those estimates, and such differences could be material to the accompanying condensed consolidated financial statements. </font><font style="font-family:Times New Roman;font-size:10pt;">The Company considers events or transactions that occur after the balance sheet date but before the financial statements are issued as additional evidence for certain estimates or to identify matters that require additional disclosure.</font><font style="font-family:Times New Roman;font-size:10pt;"> </font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:22.3px;">Changes in Presentation</font><font style="font-family:Times New Roman;font-size:10pt;">—Changes have been made to the presentation of gross purchases and sales of short-term investments within the </font><font style="font-family:Times New Roman;font-size:10pt;">condensed </font><font style="font-family:Times New Roman;font-size:10pt;">consolidated statement</font><font style="font-family:Times New Roman;font-size:10pt;">s of cash flows for the</font><font style="font-family:Times New Roman;font-size:10pt;"> </font><font style="font-family:Times New Roman;font-size:10pt;">nine months ended</font><font style="font-family:Times New Roman;font-size:10pt;"> September 30,</font><font style="font-family:Times New Roman;font-size:10pt;"> </font><font style="font-family:Times New Roman;font-size:10pt;">2010.</font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:22.3px;">Concentrations of Credit Risk</font><font style="font-family:Times New Roman;font-size:10pt;">—The Company is subject to concentrations of credit risk related to its cash and cash equivalents, note</font><font style="font-family:Times New Roman;font-size:10pt;">s receivable, trade receivables and</font><font style="font-family:Times New Roman;font-size:10pt;"> deferred rent</font><font style="font-family:Times New Roman;font-size:10pt;"> asset</font><font style="font-family:Times New Roman;font-size:10pt;">. The Company mitigates its risk with respect to cash and cash equivalents by maintaining its deposits and contracts at high quality financial institutions and monitoring the credit ratings of those institutions.</font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:22.3px;">The Company derives the largest portion of its revenues, corresponding trade receivables and the related deferred rent asset from a small number of customers in the te</font><font style="font-family:Times New Roman;font-size:10pt;">lecommunications industry. A</font><font style="font-family:Times New Roman;font-size:10pt;">pproximately </font><font style="font-family:Times New Roman;font-size:10pt;">53</font><font style="font-family:Times New Roman;font-size:10pt;">% of its revenues are derived fro</font><font style="font-family:Times New Roman;font-size:10pt;">m </font><font style="font-family:Times New Roman;font-size:10pt;">four</font><font style="font-family:Times New Roman;font-size:10pt;"> customers</font><font style="font-family:Times New Roman;font-size:10pt;">. In addition, the Company has concentrations of credit risk in certain geographic areas. </font><font style="font-family:Times New Roman;font-size:10pt;"> </font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:22.3px;">The Company mitigates its concentrations of credit risk with respect to notes and trade receivables and </font><font style="font-family:Times New Roman;font-size:10pt;">the related deferred rent asset</font><font style="font-family:Times New Roman;font-size:10pt;"> by actively monitoring the credit worthiness of its borrowers and customers. In recognizing customer revenue, the Company must assess the collectability of both the amounts billed and</font><font style="font-family:Times New Roman;font-size:10pt;"> the</font><font style="font-family:Times New Roman;font-size:10pt;"> </font><font style="font-family:Times New Roman;font-size:10pt;">amounts</font><font style="font-family:Times New Roman;font-size:10pt;"> recognized on a straight-line basis. This assessment takes customer credit risk and business and industry conditions into consideration to ultimately determine the collectability of the amounts billed. To the extent the amounts, based on management's estimates, may not be </font><font style="font-family:Times New Roman;font-size:10pt;">collectable</font><font style="font-family:Times New Roman;font-size:10pt;"> when billed</font><font style="font-family:Times New Roman;font-size:10pt;">, recognition is deferred until such point as the uncertainty is resolved. Any amounts which were previously recognized as revenue and subsequently determined to be uncollectible are charged to bad debt expense. </font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:22.3px;">The Company's largest international customer is Iusacell, which is the brand name under which a group of companies controlled by Grupo Iusacell, S.A. de C.V. (“Grupo Iusacell”) operates. Iusa</font><font style="font-family:Times New Roman;font-size:10pt;">cell represented approximately </font><font style="font-family:Times New Roman;font-size:10pt;">4</font><font style="font-family:Times New Roman;font-size:10pt;">% of the Com</font><font style="font-family:Times New Roman;font-size:10pt;">pany's total revenue for nine months ended</font><font style="font-family:Times New Roman;font-size:10pt;"> September 30, 2011.  Grupo Iusacell has been engaged in a refinancing of a majority of its U.S. Dollar denominated debt, and in connection with this, two of the legal entities of the group, including Grupo Iusacell, voluntarily filed for</font><font style="font-family:Times New Roman;font-size:10pt;"> a pre-packaged</font><font style="font-family:Times New Roman;font-size:10pt;"> Concurso Mercantil (a process substantially equivalent to Chapter 11 of U.S. Bankruptcy Law) with the backing of a majority of their financial creditors in December 2010</font><font style="font-family:Times New Roman;font-size:10pt;"> and subsequently </font><font style="font-family:Times New Roman;font-size:10pt;">concluded</font><font style="font-family:Times New Roman;font-size:10pt;"> the process in April 2011 after a Mexican court </font><font style="font-family:Times New Roman;font-size:10pt;">ruled in favor of</font><font style="font-family:Times New Roman;font-size:10pt;"> the refinancing plan presented by the two legal entities</font><font style="font-family:Times New Roman;font-size:10pt;">. As of September 30, 2011, Iusacell notes receivable, net, and related assets (which include financing lease commitments and a deferred rent asset that are primarily long-term in nature) were $</font><font style="font-family:Times New Roman;font-size:10pt;">1</font><font style="font-family:Times New Roman;font-size:10pt;">7.4</font><font style="font-family:Times New Roman;font-size:10pt;"> </font><font style="font-family:Times New Roman;font-size:10pt;">million </font><font style="font-family:Times New Roman;font-size:10pt;">and $</font><font style="font-family:Times New Roman;font-size:10pt;">5</font><font style="font-family:Times New Roman;font-size:10pt;">6.3</font><font style="font-family:Times New Roman;font-size:10pt;"> million</font><font style="font-family:Times New Roman;font-size:10pt;">, respectively.</font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:22.5px;"> </font><font style="font-family:Times New Roman;font-size:10pt;font-style:italic;">Recently Adopted Accounting Standards</font><font style="font-family:Times New Roman;font-size:10pt;">—</font><font style="font-family:Times New Roman;font-size:10pt;"> In October 2009, the</font><font style="font-family:Times New Roman;font-size:10pt;"> Financial Accounting Standards Board (“</font><font style="font-family:Times New Roman;font-size:10pt;">FASB</font><font style="font-family:Times New Roman;font-size:10pt;">”)</font><font style="font-family:Times New Roman;font-size:10pt;"> issued new guidance which establishes accounting and reporting guidance for arrangements including multiple revenue-generating activities. This guidance requires companies to allocate the overall consideration to each deliverable under the arrangement using the estimated selling prices in the absence of vendor specific objective evidence or third-party evidence of selling price for deliverables. This guidance was effective for any contracts entered into, or materially modified by the Company </font><font style="font-family:Times New Roman;font-size:10pt;">on or after</font><font style="font-family:Times New Roman;font-size:10pt;"> January 1, 2011 and </font><font style="font-family:Times New Roman;font-size:10pt;">did not have a material impact</font><font style="font-family:Times New Roman;font-size:10pt;"> on the Company's condensed consolidated results of operations or financial position.</font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:0px;"> </font><font style="font-family:Times New Roman;font-size:10pt;font-style:italic;">Accounting Standards Updates</font><font style="font-family:Times New Roman;font-size:10pt;">—</font><font style="font-family:Times New Roman;font-size:10pt;">In May 2011, the </font><font style="font-family:Times New Roman;font-size:10pt;">FASB </font><font style="font-family:Times New Roman;font-size:10pt;">amended its</font><font style="font-family:Times New Roman;font-size:10pt;"> </font><font style="font-family:Times New Roman;font-size:10pt;">guidance related to fair value </font><font style="font-family:Times New Roman;font-size:10pt;">measurement and disclosure. This </font><font style="font-family:Times New Roman;font-size:10pt;">guidance</font><font style="font-family:Times New Roman;font-size:10pt;"> </font><font style="font-family:Times New Roman;font-size:10pt;">clarifies existing measurement and disclosure requirements and results</font><font style="font-family:Times New Roman;font-size:10pt;"> </font><font style="font-family:Times New Roman;font-size:10pt;">in greater consistency between GAAP and International Financial Reporting Standards. This guidance will be effective prospectively for interim and annual periods beginning </font><font style="font-family:Times New Roman;font-size:10pt;">on or </font><font style="font-family:Times New Roman;font-size:10pt;">after December 15, 2011. </font><font style="font-family:Times New Roman;font-size:10pt;">The implementation of this guidance is not expected to have a material impact on the Company's condensed consolidated results of operations or financial position. </font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:22.5px;">In June 2011, the FASB issued amendments to disclosure requirements for presentation of comprehensive income. This guidance, effective retrospectively for the interim and annual periods beginning on or after December 15, 2011 (early adoption is permitted), requires presentation of total comprehensive income, the components of net income and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive stateme</font><font style="font-family:Times New Roman;font-size:10pt;">nts. The implementation of this</font><font style="font-family:Times New Roman;font-size:10pt;"> guidance is not expected to have a material impact on the Company's condensed consolidated results of operations or financial position</font><font style="font-family:Times New Roman;font-size:10pt;">. </font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:22.5px;">In September 2011, the FASB issued guidance on testing goodwill for impairment that will become effective for the interim and annual periods beginning on or after December 15, 2011 (early adoption is permitted). Under the new guidance, an entity has the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not</font><font style="font-family:Times New Roman;font-size:10pt;"> that</font><font style="font-family:Times New Roman;font-size:10pt;"> the fair value of a reporting unit is less than its carrying </font><font style="font-family:Times New Roman;font-size:10pt;">value</font><font style="font-family:Times New Roman;font-size:10pt;">. If the entity determines that </font><font style="font-family:Times New Roman;font-size:10pt;">it is more likely than not that the </font><font style="font-family:Times New Roman;font-size:10pt;">carrying</font><font style="font-family:Times New Roman;font-size:10pt;"> value of a reporting unit is less than its </font><font style="font-family:Times New Roman;font-size:10pt;">fair</font><font style="font-family:Times New Roman;font-size:10pt;"> value</font><font style="font-family:Times New Roman;font-size:10pt;">, then performing the two-step impairment test is unnecessary. </font><font style="font-family:Times New Roman;font-size:10pt;">The implementation of this guidance will have no impact on the Company's condensed consolidated results of operations or financial position</font><font style="font-family:Times New Roman;font-size:10pt;">.</font></p>
CY2011Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1490719000	USD
CY2011Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	2165108000	USD
CY2011Q3	us-gaap	Deferred Finance Costs Noncurrent Net DeferredFinanceCostsNoncurrentNet	43279000	USD
CY2010Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	3207611000	USD
CY2010Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1374059000	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	289392000	USD
CY2011Q3	amt	Number Of Customers In Concentration NumberOfCustomersInConcentration	4	integer
	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	204895000	USD
	us-gaap	Goodwill Translation And Purchase Accounting Adjustments GoodwillTranslationAndPurchaseAccountingAdjustments	-45803000	USD
CY2011Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	3655827000	USD
CY2010Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	1833552000	USD
CY2010Q4	us-gaap	Deferred Finance Costs Noncurrent Net DeferredFinanceCostsNoncurrentNet	46914000	USD
CY2011Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense FiniteLivedIntangibleAssetsAmortizationExpense	43300000	USD
	us-gaap	Finite Lived Intangible Assets Amortization Expense FiniteLivedIntangibleAssetsAmortizationExpense	131200000	USD
	amt	Weighted Average Remaining Amortization Period WeightedAverageRemainingAmortizationPeriod	12	years
CY2010Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense FiniteLivedIntangibleAssetsAmortizationExpense	39100000	USD
	us-gaap	Finite Lived Intangible Assets Amortization Expense FiniteLivedIntangibleAssetsAmortizationExpense	114600000	USD
CY2011Q3	amt	Scheduleof Expected Amortization Expensetabletextblock ScheduleofExpectedAmortizationExpensetabletextblock	<div><table style="border-collapse:collapse;margin-top:20px;"><tr style="height: 7px"><td style="width: 33px; text-align:left;border-color:#000000;min-width:33px;"> </td><td style="width: 600px; text-align:left;border-color:#000000;min-width:600px;"> </td><td style="width: 4px; text-align:left;border-color:#000000;min-width:4px;"> </td><td style="width: 12px; text-align:left;border-color:#000000;min-width:12px;"> </td><td style="width: 53px; text-align:left;border-color:#000000;min-width:53px;"> </td></tr><tr style="height: 16px"><td style="width: 33px; text-align:left;border-color:#000000;min-width:33px;"> </td><td style="width: 600px; text-align:left;border-color:#000000;min-width:600px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">Fiscal Year</font></td><td style="width: 4px; text-align:left;border-color:#000000;min-width:4px;"> </td><td style="width: 12px; text-align:left;border-color:#000000;min-width:12px;"> </td><td style="width: 53px; text-align:left;border-color:#000000;min-width:53px;"> </td></tr><tr style="height: 8px"><td style="width: 33px; text-align:left;border-color:#000000;min-width:33px;"> </td><td style="width: 600px; text-align:left;border-color:#000000;min-width:600px;"> </td><td style="width: 4px; text-align:left;border-color:#000000;min-width:4px;"> </td><td style="width: 12px; text-align:left;border-color:#000000;min-width:12px;"> </td><td style="width: 53px; text-align:left;border-color:#000000;min-width:53px;"> </td></tr><tr style="height: 16px"><td style="width: 33px; text-align:left;border-color:#000000;min-width:33px;"> </td><td style="width: 600px; text-align:left;border-color:#000000;min-width:600px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">2011 (remaining year)</font></td><td style="width: 4px; text-align:left;border-color:#000000;min-width:4px;"> </td><td style="width: 12px; text-align:left;border-color:#000000;min-width:12px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">$</font></td><td style="width: 53px; text-align:right;border-color:#000000;min-width:53px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;"> 45,473</font></td></tr><tr style="height: 16px"><td style="width: 33px; text-align:left;border-color:#000000;min-width:33px;"> </td><td style="width: 600px; text-align:left;border-color:#000000;min-width:600px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">2012</font></td><td style="width: 4px; text-align:left;border-color:#000000;min-width:4px;"> </td><td style="width: 12px; text-align:left;border-color:#000000;min-width:12px;"> </td><td style="width: 53px; text-align:right;border-color:#000000;min-width:53px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;"> 180,524</font></td></tr><tr style="height: 16px"><td style="width: 33px; text-align:left;border-color:#000000;min-width:33px;"> </td><td style="width: 600px; text-align:left;border-color:#000000;min-width:600px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">2013</font></td><td style="width: 4px; text-align:left;border-color:#000000;min-width:4px;"> </td><td style="width: 12px; text-align:left;border-color:#000000;min-width:12px;"> </td><td style="width: 53px; text-align:right;border-color:#000000;min-width:53px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;"> 172,219</font></td></tr><tr style="height: 16px"><td style="width: 33px; text-align:left;border-color:#000000;min-width:33px;"> </td><td style="width: 600px; text-align:left;border-color:#000000;min-width:600px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">2014</font></td><td style="width: 4px; text-align:left;border-color:#000000;min-width:4px;"> </td><td style="width: 12px; text-align:left;border-color:#000000;min-width:12px;"> </td><td style="width: 53px; text-align:right;border-color:#000000;min-width:53px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;"> 163,924</font></td></tr><tr style="height: 16px"><td style="width: 33px; text-align:left;border-color:#000000;min-width:33px;"> </td><td style="width: 600px; text-align:left;border-color:#000000;min-width:600px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">2015</font></td><td style="width: 4px; text-align:left;border-color:#000000;min-width:4px;"> </td><td style="width: 12px; text-align:left;border-color:#000000;min-width:12px;"> </td><td style="width: 53px; text-align:right;border-color:#000000;min-width:53px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;"> 150,347</font></td></tr><tr style="height: 16px"><td style="width: 33px; text-align:left;border-color:#000000;min-width:33px;"> </td><td style="width: 600px; text-align:left;border-color:#000000;min-width:600px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;">2016</font></td><td style="width: 4px; text-align:left;border-color:#000000;min-width:4px;"> </td><td style="width: 12px; text-align:left;border-color:#000000;min-width:12px;"> </td><td style="width: 53px; text-align:right;border-color:#000000;min-width:53px;"><font style="FONT-FAMILY: Times New Roman;FONT-SIZE: 9pt;COLOR: #000000;"> 142,590</font></td></tr><tr style="height: 8px"><td style="width: 33px; text-align:left;border-color:#000000;min-width:33px;"> </td><td style="width: 600px; text-align:left;border-color:#000000;min-width:600px;"> </td><td style="width: 4px; text-align:left;border-color:#000000;min-width:4px;"> </td><td style="width: 12px; text-align:left;border-color:#000000;min-width:12px;"> </td><td style="width: 53px; text-align:left;border-color:#000000;min-width:53px;"> </td></tr></table></div>
	us-gaap	Future Amortization Expense Year One FutureAmortizationExpenseYearOne	180524000	USD
	us-gaap	Future Amortization Expense Year Two FutureAmortizationExpenseYearTwo	172219000	USD
	us-gaap	Future Amortization Expense Year Three FutureAmortizationExpenseYearThree	163924000	USD
	us-gaap	Future Amortization Expense Year Four FutureAmortizationExpenseYearFour	150347000	USD
	us-gaap	Future Amortization Expense Year Five FutureAmortizationExpenseYearFive	142590000	USD
	amt	Future Amortization Expense Remaining Fiscal Year FutureAmortizationExpenseRemainingFiscalYear	45473000	USD
	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	7600000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	3960000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	3166000	shares
	us-gaap	Segment Reporting General Information SegmentReportingGeneralInformation	three
CY2010Q3	amt	Segment Reporting Segment Gross Profit SegmentReportingSegmentGrossProfit	393934000	USD
CY2010Q3	amt	Segment Operating Expenses SegmentOperatingExpenses	122973000	USD
CY2010Q3	amt	Segment Selling General Administration And Development Expenses SegmentSellingGeneralAdministrationAndDevelopmentExpenses	28742000	USD
CY2010Q3	us-gaap	Segment Reporting Information Profit Loss SegmentReportingInformationProfitLoss	365192000	USD
CY2010Q3	amt	Other Selling General Administration And Development Expenses OtherSellingGeneralAdministrationAndDevelopmentExpenses	15200000	USD
CY2010Q3	us-gaap	Segment Reporting Information Interest Expense SegmentReportingInformationInterestExpense	57013000	USD
CY2011Q3	amt	Segment Operating Expenses SegmentOperatingExpenses	167170000	USD
CY2011Q3	amt	Segment Reporting Segment Gross Profit SegmentReportingSegmentGrossProfit	466731000	USD
CY2011Q3	us-gaap	Segment Reporting Information Profit Loss SegmentReportingInformationProfitLoss	422656000	USD
CY2011Q3	amt	Other Selling General Administration And Development Expenses OtherSellingGeneralAdministrationAndDevelopmentExpenses	22024000	USD
CY2010Q4	us-gaap	Fair Value Liabilities Measured On Recurring Basis Derivative Financial Instruments Liabilities FairValueLiabilitiesMeasuredOnRecurringBasisDerivativeFinancialInstrumentsLiabilities	3311000	USD
CY2011Q3	us-gaap	Fair Value Liabilities Measured On Recurring Basis Derivative Financial Instruments Liabilities FairValueLiabilitiesMeasuredOnRecurringBasisDerivativeFinancialInstrumentsLiabilities	0	USD
CY2011Q3	us-gaap	Business Acquisition Contingent Consideration At Fair Value BusinessAcquisitionContingentConsiderationAtFairValue	8182000	USD
CY2011Q3	amt	Fairvaluemeasurementwithunobservableinputsreconciliationrecurringbasisliabilitypurchases Fairvaluemeasurementwithunobservableinputsreconciliationrecurringbasisliabilitypurchases	2100000	USD
	amt	Fairvaluemeasurementwithunobservableinputsreconciliationrecurringbasisliabilitypurchases Fairvaluemeasurementwithunobservableinputsreconciliationrecurringbasisliabilitypurchases	2200000	USD
CY2011Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	1300000	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	1800000	USD
CY2011Q3	amt	Fairvaluemeasurementwithunobservableinputsreconciliationrecurringbasisliabilitypaydowns Fairvaluemeasurementwithunobservableinputsreconciliationrecurringbasisliabilitypaydowns	900000	USD
	amt	Fairvaluemeasurementwithunobservableinputsreconciliationrecurringbasisliabilitypaydowns Fairvaluemeasurementwithunobservableinputsreconciliationrecurringbasisliabilitypaydowns	1600000	USD
	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	400000	USD
	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	3500000	USD
CY2011Q3	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	1200000	USD
CY2011Q3	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	26400000	USD
CY2010Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	18000000	USD
CY2010Q3	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	800000	USD
	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	2200000	USD
CY2011Q3	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	45900000	USD
CY2010Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	33000000	USD
	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	2400000	USD
CY2011Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-15701000	USD
CY2011Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2010Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	93438000	USD
CY2011Q3	us-gaap	Segment Reporting Information Interest Expense SegmentReportingInformationInterestExpense	241426000	USD
CY2011Q3	amt	Segment Selling General Administration And Development Expenses SegmentSellingGeneralAdministrationAndDevelopmentExpenses	44075000	USD
CY2011Q3	us-gaap	Share Based Compensation ShareBasedCompensation	12140000	USD
	amt	Segment Operating Expenses SegmentOperatingExpenses	453575000	USD
	amt	Segment Reporting Segment Gross Profit SegmentReportingSegmentGrossProfit	1347345000	USD
	amt	Segment Selling General Administration And Development Expenses SegmentSellingGeneralAdministrationAndDevelopmentExpenses	122277000	USD
	us-gaap	Segment Reporting Information Profit Loss SegmentReportingInformationProfitLoss	1225068000	USD
	amt	Other Selling General Administration And Development Expenses OtherSellingGeneralAdministrationAndDevelopmentExpenses	58230000	USD
	us-gaap	Segment Reporting Information Interest Expense SegmentReportingInformationInterestExpense	371378000	USD
	amt	Segment Operating Expenses SegmentOperatingExpenses	341641000	USD
	amt	Segment Selling General Administration And Development Expenses SegmentSellingGeneralAdministrationAndDevelopmentExpenses	78368000	USD
	us-gaap	Segment Reporting Information Profit Loss SegmentReportingInformationProfitLoss	1028353000	USD
	amt	Segment Reporting Segment Gross Profit SegmentReportingSegmentGrossProfit	1106721000	USD
	amt	Other Selling General Administration And Development Expenses OtherSellingGeneralAdministrationAndDevelopmentExpenses	45890000	USD
	us-gaap	Segment Reporting Information Interest Expense SegmentReportingInformationInterestExpense	186457000	USD

Files In Submission

Name	View Source	Status
0001193125-11-291078-index-headers.html	Edgar Link	pending
0001193125-11-291078-index.html	Edgar Link	pending
0001193125-11-291078.txt	Edgar Link	pending
0001193125-11-291078-xbrl.zip	Edgar Link	pending
amt-20110930.xml	Edgar Link	completed
amt-20110930.xsd	Edgar Link	pending
amt-20110930_cal.xml	Edgar Link	unprocessable
amt-20110930_def.xml	Edgar Link	unprocessable
amt-20110930_lab.xml	Edgar Link	unprocessable
amt-20110930_pre.xml	Edgar Link	unprocessable
d234886d10q.htm	Edgar Link	pending
d234886dex121.htm	Edgar Link	pending
d234886dex311.htm	Edgar Link	pending
d234886dex312.htm	Edgar Link	pending
d234886dex32.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
R1.htm	Edgar Link	pending
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R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$AMT
AMERICAN TOWER CORP /MA/ Stock $amt

2011 Q4 Form 10-Q Financial Statement

#000119312511291078 Filed on November 02, 2011

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMT AMERICAN TOWER CORP /MA/ Stock $amt

2011 Q4 Form 10-Q Financial Statement

#000119312511291078 Filed on November 02, 2011

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMT
AMERICAN TOWER CORP /MA/ Stock $amt