$AMG
AFFILIATED MANAGERS GROUP, INC. Stock $amg

$amg Overview Financials Valuation SEC Filings Company Website

2012 Q4 Form 10-Q Financial Statement

#000104746912010126 Filed on November 06, 2012

Income Statement

Concept	2012 Q4	2012 Q3	2011 Q3
Revenue	$491.0M	$467.3M	$413.8M
YoY Change	22.02%	12.93%	16.76%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin	$318.0M	$93.90M	$83.50M
YoY Change	20.87%	12.46%	-62.87%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$34.40M	$27.50M	$26.10M
YoY Change	-1.15%	5.36%	7.85%
% of Gross Profit
Operating Expenses	$364.1M	$327.6M	$287.8M
YoY Change	18.52%	13.83%	11.21%
Operating Profit	$126.9M	$139.7M	$126.0M
YoY Change	33.3%	10.87%
Interest Expense	$50.30M	$21.80M	$18.10M
YoY Change	264.49%	20.44%	-796.15%
% of Operating Profit	39.64%	15.6%	14.37%
Other Income/Expense, Net		-$21.60M	-$26.10M
YoY Change		-17.24%
Pretax Income	$177.1M	$137.5M	$99.90M
YoY Change	62.48%	37.64%	7.42%
Income Tax	$37.80M	$19.40M	$19.80M
% Of Pretax Income	21.34%	14.11%	19.82%
Net Earnings	$75.00M	$54.90M	$40.10M
YoY Change	86.1%	36.91%	17.94%
Net Earnings / Revenue	15.27%	11.75%	9.69%
Basic Earnings Per Share		$1.06	$0.77
Diluted Earnings Per Share	$1.40	$1.04	$0.76
COMMON SHARES
Basic Shares Outstanding	51.80M shares	51.70M shares	51.90M shares
Diluted Shares Outstanding		53.00M shares	53.00M shares

Balance Sheet

Concept	2012 Q4	2012 Q3	2011 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$559.3M	$372.6M	$323.3M
YoY Change	24.43%	15.25%	26.54%
Cash & Equivalents	$430.4M	$372.6M	$323.3M
Short-Term Investments	$128.9M
Other Short-Term Assets		$61.30M	$76.80M
YoY Change		-20.18%	30.61%
Inventory
Prepaid Expenses
Receivables	$255.5M	$243.8M	$276.8M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$912.3M	$838.1M	$676.9M
YoY Change	4.1%	23.81%	21.9%
LONG-TERM ASSETS
Property, Plant & Equipment	$81.50M	$72.40M	$64.80M
YoY Change	17.95%	11.73%	-2.99%
Goodwill	$2.355B	$2.353B
YoY Change	11.24%
Intangibles	$1.586B	$1.615B
YoY Change	20.01%
Long-Term Investments	$1.784B	$1.046B	$683.3M
YoY Change	58.77%	53.04%	-4.55%
Other Assets	$221.3M	$215.9M
YoY Change	0.96%
Total Long-Term Assets	$5.275B	$5.193B	$4.455B
YoY Change	21.47%	16.56%	1.35%
TOTAL ASSETS
Total Short-Term Assets	$912.3M	$838.1M	$676.9M
Total Long-Term Assets	$5.275B	$5.193B	$4.455B
Total Assets	$6.187B	$6.031B	$5.132B
YoY Change	18.55%	17.52%	3.65%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$59.50M	$10.70M	$12.90M
YoY Change	-33.96%	-17.05%	-87.13%
Accrued Expenses	$250.3M
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$375.8M	$372.9M	$58.90M
YoY Change	-10.01%	533.11%	-61.88%
LONG-TERM LIABILITIES
Long-Term Debt	$1.631B	$1.606B	$1.154B
YoY Change	36.09%	39.18%	-11.17%
Other Long-Term Liabilities	$164.7M	$162.4M	$223.3M
YoY Change	13.04%	-27.27%	18.21%
Total Long-Term Liabilities	$164.7M	$162.4M	$1.377B
YoY Change	13.04%	-88.21%	-7.44%
TOTAL LIABILITIES
Total Short-Term Liabilities	$375.8M	$372.9M	$58.90M
Total Long-Term Liabilities	$164.7M	$162.4M	$1.377B
Total Liabilities	$2.668B	$2.663B	$3.326B
YoY Change	17.67%	-19.94%	2.7%
SHAREHOLDERS EQUITY
Retained Earnings	$1.351B	$1.276B
YoY Change	14.79%
Common Stock	$869.0M	$855.8M
YoY Change	-6.36%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$214.6M	$266.4M
YoY Change	-25.67%
Treasury Stock Shares	1.700M shares
Shareholders Equity	$2.084B	$1.931B	$1.806B
YoY Change
Total Liabilities & Shareholders Equity	$6.187B	$6.031B	$5.132B
YoY Change	18.55%	17.52%	3.65%

Cashflow Statement

Concept	2012 Q4	2012 Q3	2011 Q3
OPERATING ACTIVITIES
Net Income	$75.00M	$54.90M	$40.10M
YoY Change	86.1%	36.91%	17.94%
Depreciation, Depletion And Amortization	$34.40M	$27.50M	$26.10M
YoY Change	-1.15%	5.36%	7.85%
Cash From Operating Activities	$186.1M	$211.1M	$242.2M
YoY Change	17.34%	-12.84%	43.82%
INVESTING ACTIVITIES
Capital Expenditures	-$10.10M	$4.900M	$3.900M
YoY Change	29.49%	25.64%	-277.27%
Acquisitions
YoY Change
Other Investing Activities	-$44.30M	-$349.1M	-$38.80M
YoY Change	5437.5%	799.74%	63.71%
Cash From Investing Activities	-$54.40M	-$354.0M	-$42.70M
YoY Change	532.56%	729.04%	64.23%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		-$23.30M	$47.70M
YoY Change		-148.85%	1092.5%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-74.30M	202.3M	-183.4M
YoY Change	204.51%	-210.31%	65.82%
NET CHANGE
Cash From Operating Activities	186.1M	211.1M	242.2M
Cash From Investing Activities	-54.40M	-354.0M	-42.70M
Cash From Financing Activities	-74.30M	202.3M	-183.4M
Net Change In Cash	57.40M	59.40M	16.10M
YoY Change	-54.3%	268.94%	-49.37%
FREE CASH FLOW
Cash From Operating Activities	$186.1M	$211.1M	$242.2M
Capital Expenditures	-$10.10M	$4.900M	$3.900M
Free Cash Flow	$196.2M	$206.2M	$238.3M
YoY Change	17.91%	-13.47%	39.68%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	amg	Operating Loss Carryforwards State And Local Expiration Period OperatingLossCarryforwardsStateAndLocalExpirationPeriod	P15Y
	amg	Tax Credit Carryforwards Foreign Expiration Period TaxCreditCarryforwardsForeignExpirationPeriod	P10Y
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	17700000	USD
CY2011Q3	us-gaap	Asset Management Fees AssetManagementFees	413800000	USD
	us-gaap	Asset Management Fees AssetManagementFees	1302400000	USD
CY2011Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	168900000	USD
CY2011Q3	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	83500000	USD
CY2011Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	22100000	USD
CY2011Q3	amg	Depreciation And Other Amortization DepreciationAndOtherAmortization	4000000	USD
CY2011Q3	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	9300000	USD
CY2011Q3	us-gaap	Operating Expenses OperatingExpenses	287800000	USD
CY2011Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	126000000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	544900000	USD
	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	261600000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	66300000	USD
	amg	Depreciation And Other Amortization DepreciationAndOtherAmortization	11600000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	27100000	USD
	us-gaap	Operating Expenses OperatingExpenses	911500000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	390900000	USD
CY2011Q3	amg	Investment And Other Income Loss InvestmentAndOtherIncomeLoss	-9500000	USD
CY2011Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	9800000	USD
CY2011Q3	us-gaap	Interest Expense InterestExpense	18100000	USD
CY2011Q3	amg	Imputed Interest ImputedInterest	8300000	USD
	amg	Investment And Other Income Loss InvestmentAndOtherIncomeLoss	-6800000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	40100000	USD
	us-gaap	Interest Expense InterestExpense	55600000	USD
	amg	Imputed Interest ImputedInterest	24900000	USD
CY2011Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-26100000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-47200000	USD
CY2011Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	99900000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	343700000	USD
CY2011Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	19800000	USD
CY2011Q3	us-gaap	Profit Loss ProfitLoss	80100000	USD
CY2011Q3	us-gaap	Minority Interest In Net Income Loss Other Minority Interests MinorityInterestInNetIncomeLossOtherMinorityInterests	40000000	USD
CY2011Q3	us-gaap	Net Income Loss NetIncomeLoss	40100000	USD
CY2012Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	134200000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	289700000	USD
CY2011Q3	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1800000	USD
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	6200000	USD
CY2011Q3	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	14800000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	31800000	USD
CY2011Q3	us-gaap	Accretion Expense AccretionExpense	8300000	USD
CY2011Q3	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	27000000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	110500000	USD
CY2011Q3	us-gaap	Share Based Compensation ShareBasedCompensation	7300000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	19300000	USD
	us-gaap	Accretion Expense AccretionExpense	24900000	USD
CY2011Q4	us-gaap	Long Term Line Of Credit LongTermLineOfCredit	250000000	USD
CY2011Q4	amg	Senior Convertible Debt Noncurrent SeniorConvertibleDebtNoncurrent	435600000	USD
CY2011Q4	amg	Junior Convertible Trust Preferred Debt Noncurrent JuniorConvertibleTrustPreferredDebtNoncurrent	512600000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	506000000	USD
CY2011Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	145700000	USD
CY2011Q4	us-gaap	Liabilities Liabilities	2267500000	USD
CY2011Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	451800000	USD
CY2011Q4	us-gaap	Common Stock Value CommonStockValue	500000	USD
CY2011Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	927500000	USD
CY2011Q4	amg	Accumulated Other Comprehensive Income Loss Attributable To Parent Net Of Tax AccumulatedOtherComprehensiveIncomeLossAttributableToParentNetOfTax	50000000	USD
CY2011Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1176700000	USD
CY2011Q4	us-gaap	Stockholders Equity Before Treasury Stock StockholdersEquityBeforeTreasuryStock	2154700000	USD
CY2012Q3	us-gaap	Minority Interest In Net Income Loss Other Minority Interests MinorityInterestInNetIncomeLossOtherMinorityInterests	63200000	USD
CY2011Q3	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	500000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	73200000	USD
	us-gaap	Profit Loss ProfitLoss	270500000	USD
CY2011Q3	amg	Affiliate Equity Expense AffiliateEquityExpense	1900000	USD
CY2012Q3	us-gaap	Operating Expenses OperatingExpenses	327600000	USD
CY2012Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	139700000	USD
CY2012Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	137500000	USD
	us-gaap	Net Cash Provided By Used In Continuing Operations NetCashProvidedByUsedInContinuingOperations	-76900000	USD
CY2011Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	219200000	USD
CY2011Q4	us-gaap	Assets Assets	5218900000	USD
CY2012Q3	us-gaap	Net Income Loss NetIncomeLoss	54900000	USD
	us-gaap	Operating Expenses OperatingExpenses	1041000000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	273500000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	318000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	98900000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	449500000	USD
	amg	Affiliate Equity Expense AffiliateEquityExpense	9100000	USD
CY2011Q3	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-9000000	USD
CY2011Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	214900000	USD
CY2011Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-41300000	USD
CY2012Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	70800000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	53100000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	114900000	USD
CY2011Q4	us-gaap	Marketable Securities Current MarketableSecuritiesCurrent	100400000	USD
CY2011Q4	amg	Unsettled Fund Share Receivables UnsettledFundShareReceivables	34500000	USD
CY2011Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	77100000	USD
CY2011Q4	us-gaap	Assets Current AssetsCurrent	876400000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	69100000	USD
CY2011Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	615800000	USD
CY2011Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	1321100000	USD
CY2011Q4	us-gaap	Goodwill Goodwill	2117300000	USD
CY2011Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	343600000	USD
CY2011Q4	amg	Unsettled Fund Share Payables UnsettledFundSharePayables	40800000	USD
CY2011Q4	us-gaap	Due To Related Parties Current DueToRelatedPartiesCurrent	33200000	USD
CY2011Q4	us-gaap	Liabilities Current LiabilitiesCurrent	417600000	USD
CY2011Q3	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	48000000	USD
	us-gaap	Minority Interest In Net Income Loss Other Minority Interests MinorityInterestInNetIncomeLossOtherMinorityInterests	145900000	USD
CY2011Q4	us-gaap	Treasury Stock Value TreasuryStockValue	288700000	USD
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	1866000000	USD
CY2011Q4	us-gaap	Other Minority Interests OtherMinorityInterests	633600000	USD
CY2011Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2499600000	USD
CY2011Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5218900000	USD
CY2012Q3	us-gaap	Assets Current AssetsCurrent	838100000	USD
CY2012Q3	us-gaap	Assets Assets	6030800000	USD
CY2012Q3	us-gaap	Liabilities Current LiabilitiesCurrent	372900000	USD
CY2012Q3	us-gaap	Liabilities Liabilities	2663000000	USD
CY2012Q3	us-gaap	Stockholders Equity Before Treasury Stock StockholdersEquityBeforeTreasuryStock	2197400000	USD
CY2012Q3	us-gaap	Stockholders Equity StockholdersEquity	1931000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	124600000	USD
CY2011Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	51900000	shares
CY2011Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	53000000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	51900000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	53200000	shares
CY2011Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.77
CY2011Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.76
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.40
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.34
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-19500000	USD
CY2011Q3	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-37100000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-18200000	USD
CY2012Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2854700000	USD
CY2012Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	243800000	USD
CY2011Q3	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-600000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	1700000	USD
CY2011Q3	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	6200000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	9200000	USD
CY2011Q3	amg	Increase Decrease In Unsettled Fund Shares Receivables IncreaseDecreaseInUnsettledFundSharesReceivables	-32000000	USD
	amg	Increase Decrease In Unsettled Fund Shares Receivables IncreaseDecreaseInUnsettledFundSharesReceivables	16700000	USD
CY2011Q3	amg	Increase Decrease In Unsettled Fund Shares Payables IncreaseDecreaseInUnsettledFundSharesPayables	-24500000	USD
	amg	Increase Decrease In Unsettled Fund Shares Payables IncreaseDecreaseInUnsettledFundSharesPayables	7000000	USD
CY2011Q3	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	36700000	USD
	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	21900000	USD
CY2011Q3	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	242200000	USD
CY2012Q3	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	211100000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	549900000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	447100000	USD
	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	13300000	USD
CY2011Q3	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3900000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	8300000	USD
CY2011Q3	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	39400000	USD
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	48400000	USD
	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	10900000	USD
CY2011Q3	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-42800000	USD
CY2012Q3	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-354000000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-59100000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-747900000	USD
CY2012Q3	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents Continuing Operations EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations	2300000	USD
	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	110000000	USD
CY2011Q3	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	85000000	USD
	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	360000000	USD
CY2011Q3	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	300000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	21200000	USD
CY2012Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	372600000	USD
	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	8500000	USD
	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	4900000	USD
	us-gaap	Payments For Proceeds From Hedge Financing Activities PaymentsForProceedsFromHedgeFinancingActivities	-4000000	USD
CY2011Q3	us-gaap	Proceeds From Repayments Of Other Long Term Debt ProceedsFromRepaymentsOfOtherLongTermDebt	-8400000	USD
	us-gaap	Proceeds From Repayments Of Other Long Term Debt ProceedsFromRepaymentsOfOtherLongTermDebt	-80700000	USD
CY2011Q3	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	34600000	USD
	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	115600000	USD
CY2011Q3	amg	Proceeds From Payments For Affiliate Equity Issuances And Repurchases ProceedsFromPaymentsForAffiliateEquityIssuancesAndRepurchases	-6800000	USD
	amg	Proceeds From Payments For Affiliate Equity Issuances And Repurchases ProceedsFromPaymentsForAffiliateEquityIssuancesAndRepurchases	-6700000	USD
CY2011Q3	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-183300000	USD
CY2012Q3	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	202200000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	48000000	USD
CY2011Q3	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	800000	USD
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CY2011Q3	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	5000000	USD
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CY2012Q3	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	7900000	USD
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CY2012Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	5000000	USD
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CY2012Q3	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	100000	USD
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CY2011Q3	us-gaap	Trading Securities Realized Gain TradingSecuritiesRealizedGain	100000	USD
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	dei	Entity Registrant Name EntityRegistrantName	AFFILIATED MANAGERS GROUP INC
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CY2011Q3	amg	Compensation Expenses Related To Affiliate Equity CompensationExpensesRelatedToAffiliateEquity	6400000	USD
CY2011Q3	amg	Compensation Expenses Related To Affiliate Equity Attributable To Controlling Interest CompensationExpensesRelatedToAffiliateEquityAttributableToControllingInterest	1900000	USD
	amg	Compensation Expenses Related To Affiliate Equity CompensationExpensesRelatedToAffiliateEquity	17600000	USD
CY2012Q3	amg	Compensation Expenses Related To Affiliate Equity CompensationExpensesRelatedToAffiliateEquity	6500000	USD
	amg	Compensation Expenses Related To Affiliate Equity CompensationExpensesRelatedToAffiliateEquity	21600000	USD
	amg	Compensation Expenses Related To Affiliate Equity Attributable To Controlling Interest CompensationExpensesRelatedToAffiliateEquityAttributableToControllingInterest	9300000	USD
	amg	Compensation Expenses Related To Affiliate Equity Attributable To Controlling Interest CompensationExpensesRelatedToAffiliateEquityAttributableToControllingInterest	9100000	USD
CY2012Q3	amg	Compensation Expenses Related To Affiliate Equity Attributable To Controlling Interest CompensationExpensesRelatedToAffiliateEquityAttributableToControllingInterest	2300000	USD
	amg	Proceeds From Noncontrolling Interest ProceedsFromNoncontrollingInterest	9300000	USD
	us-gaap	Payments For Repurchase Of Redeemable Noncontrolling Interest PaymentsForRepurchaseOfRedeemableNoncontrollingInterest	-15800000	USD
	amg	Redeemable Noncontrolling Interest Change In Redemption Value RedeemableNoncontrollingInterestChangeInRedemptionValue	67800000	USD
CY2011Q3	amg	Adjustments To Additional Paid In Capital Increase Decrease In Carrying Amount Of Redeemable Noncontrolling Interests AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterests	-4900000	USD
CY2012Q3	amg	Adjustments To Additional Paid In Capital Increase Decrease In Carrying Amount Of Redeemable Noncontrolling Interests AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterests	1100000	USD
	amg	Adjustments To Additional Paid In Capital Increase Decrease In Carrying Amount Of Redeemable Noncontrolling Interests AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterests	-4500000	USD
	amg	Adjustments To Additional Paid In Capital Increase Decrease In Carrying Amount Of Redeemable Noncontrolling Interests AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterests	-7500000	USD
CY2011Q3	amg	Increase Decrease In Equity Due To Profit Loss And Net Transfers With Noncontrolling Interests IncreaseDecreaseInEquityDueToProfitLossAndNetTransfersWithNoncontrollingInterests	35200000	USD
CY2012Q3	amg	Increase Decrease In Equity Due To Profit Loss And Net Transfers With Noncontrolling Interests IncreaseDecreaseInEquityDueToProfitLossAndNetTransfersWithNoncontrollingInterests	56000000	USD
	amg	Increase Decrease In Equity Due To Profit Loss And Net Transfers With Noncontrolling Interests IncreaseDecreaseInEquityDueToProfitLossAndNetTransfersWithNoncontrollingInterests	120100000	USD
	amg	Increase Decrease In Equity Due To Profit Loss And Net Transfers With Noncontrolling Interests IncreaseDecreaseInEquityDueToProfitLossAndNetTransfersWithNoncontrollingInterests	91400000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	200000	USD
	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	1378300000	USD
	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	134800000	USD
	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	2.60
	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	1390000000	USD
	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	111000000	USD
	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	2.15
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	57700000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	-2200000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-5500000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-500000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	1200000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	50000000	USD
CY2012Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	67700000	USD
CY2012Q3	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	77400000	USD
CY2012Q3	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	-3100000	USD
CY2012Q3	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-6600000	USD
CY2012Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	53000000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	52900000	shares
CY2011Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	40000000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	145900000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-18200000	USD
	us-gaap	Tax Benefit From Stock Options Exercised1 TaxBenefitFromStockOptionsExercised1	800000	USD
CY2012Q3	us-gaap	Fair Value Assets Level1 To Level2 Transfers Amount FairValueAssetsLevel1ToLevel2TransfersAmount	2000000	USD
	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P3Y
CY2012Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	63400000	USD
CY2012Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear	37800000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	24300000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-700000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	700000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	28100000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-64800000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-74300000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	1900000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-1800000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	16600000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	16500000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-109600000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-104000000	USD
CY2012Q3	amg	Junior Convertible Trust Preferred Debt Noncurrent JuniorConvertibleTrustPreferredDebtNoncurrent	514800000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	500000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	4400000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	-10200000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	-11500000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	-500000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	-1400000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-34600000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-18200000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	15200000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	19700000	USD
	us-gaap	Indefinite Lived Intangible Assets Translation Adjustments IndefiniteLivedIntangibleAssetsTranslationAdjustments	9400000	USD
CY2012Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	196800000	USD
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
	amg	Number Of Principal Distribution Channels NumberOfPrincipalDistributionChannels	3	channel
CY2012Q3	amg	Accumulated Other Comprehensive Income Loss Attributable To Parent Net Of Tax AccumulatedOtherComprehensiveIncomeLossAttributableToParentNetOfTax	66000000	USD
CY2012Q3	us-gaap	Senior Long Term Notes SeniorLongTermNotes	200000000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	44500000	USD
CY2012Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-2200000	USD
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.92
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.87
CY2012Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.06
CY2012Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.04
	us-gaap	Business Combination Pro Forma Information Revenue Of Acquiree Since Acquisition Date Actual BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual	43200000	USD
	us-gaap	Business Combination Pro Forma Information Earnings Or Loss Of Acquiree Since Acquisition Date Actual BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual	7000000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	565900000	USD
CY2012Q3	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	93900000	USD
	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	267700000	USD
CY2012Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	24000000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	169100000	USD
CY2012Q3	amg	Depreciation And Other Amortization DepreciationAndOtherAmortization	3500000	USD
	amg	Depreciation And Other Amortization DepreciationAndOtherAmortization	10600000	USD
CY2012Q3	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	9400000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	27700000	USD
CY2012Q3	amg	Investment And Other Income Loss InvestmentAndOtherIncomeLoss	6900000	USD
	amg	Investment And Other Income Loss InvestmentAndOtherIncomeLoss	20300000	USD
CY2012Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	19400000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	47300000	USD
CY2012Q3	us-gaap	Interest Expense InterestExpense	21800000	USD
	us-gaap	Interest Expense InterestExpense	58800000	USD
CY2012Q3	amg	Imputed Interest ImputedInterest	6700000	USD
	amg	Imputed Interest ImputedInterest	-35700000	USD
CY2012Q3	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	309700000	USD
CY2012Q3	amg	Unsettled Fund Share Payables UnsettledFundSharePayables	52500000	USD
CY2012Q3	us-gaap	Long Term Line Of Credit LongTermLineOfCredit	445000000	USD
CY2012Q3	amg	Senior Convertible Debt Noncurrent SeniorConvertibleDebtNoncurrent	446500000	USD
CY2012Q3	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	521400000	USD
CY2012Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	162400000	USD
CY2012Q3	us-gaap	Common Stock Value CommonStockValue	500000	USD
CY2012Q3	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	855300000	USD
CY2012Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1275600000	USD
CY2012Q3	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2000000	USD
CY2012Q3	us-gaap	Treasury Stock Value TreasuryStockValue	266400000	USD
CY2012Q3	us-gaap	Other Minority Interests OtherMinorityInterests	923700000	USD
CY2012Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6030800000	USD
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	5700000	USD
CY2012Q3	us-gaap	Accretion Expense AccretionExpense	6700000	USD
	us-gaap	Accretion Expense AccretionExpense	-35700000	USD
CY2012Q3	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	20800000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	79400000	USD
CY2012Q3	us-gaap	Tax Benefit From Stock Options Exercised1 TaxBenefitFromStockOptionsExercised1	700000	USD
	us-gaap	Tax Benefit From Stock Options Exercised1 TaxBenefitFromStockOptionsExercised1	1400000	USD
CY2012Q3	us-gaap	Share Based Compensation ShareBasedCompensation	8000000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	24100000	USD
CY2012Q3	amg	Affiliate Equity Expense AffiliateEquityExpense	2300000	USD
	amg	Affiliate Equity Expense AffiliateEquityExpense	9400000	USD
CY2012Q3	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1900000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1300000	USD
CY2012Q3	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-2400000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	21300000	USD
CY2012Q3	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	3800000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	12900000	USD
CY2012Q3	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	1600000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	2500000	USD
CY2012Q3	amg	Increase Decrease In Unsettled Fund Shares Receivables IncreaseDecreaseInUnsettledFundSharesReceivables	5600000	USD
	amg	Increase Decrease In Unsettled Fund Shares Receivables IncreaseDecreaseInUnsettledFundSharesReceivables	15300000	USD
CY2012Q3	amg	Increase Decrease In Unsettled Fund Shares Payables IncreaseDecreaseInUnsettledFundSharesPayables	4400000	USD
	amg	Increase Decrease In Unsettled Fund Shares Payables IncreaseDecreaseInUnsettledFundSharesPayables	10700000	USD
CY2012Q3	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	38900000	USD
	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	-7400000	USD
CY2012Q3	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	350000000	USD
	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	755300000	USD
CY2012Q3	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	4900000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	9900000	USD
CY2012Q3	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	2700000	USD
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	13800000	USD
CY2012Q3	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	3600000	USD
	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	31100000	USD
CY2012Q3	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	360000000	USD
	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	555000000	USD
	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	360000000	USD
CY2012Q3	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	23300000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	45700000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	60900000	USD
CY2012Q3	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	6000000	USD
	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	6000000	USD
CY2012Q3	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	6900000	USD
	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	11600000	USD
CY2012Q3	us-gaap	Proceeds From Repayments Of Other Long Term Debt ProceedsFromRepaymentsOfOtherLongTermDebt	-1800000	USD
	us-gaap	Proceeds From Repayments Of Other Long Term Debt ProceedsFromRepaymentsOfOtherLongTermDebt	-2100000	USD
CY2012Q3	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	18000000	USD
	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	137700000	USD
CY2012Q3	amg	Proceeds From Payments For Affiliate Equity Issuances And Repurchases ProceedsFromPaymentsForAffiliateEquityIssuancesAndRepurchases	-2200000	USD
	amg	Proceeds From Payments For Affiliate Equity Issuances And Repurchases ProceedsFromPaymentsForAffiliateEquityIssuancesAndRepurchases	-25100000	USD
	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents Continuing Operations EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations	3400000	USD
CY2012Q3	amg	Deferred Foreign Income Tax Expense Benefit Adjustment For United Kingdom Tax Rate Change DeferredForeignIncomeTaxExpenseBenefitAdjustmentForUnitedKingdomTaxRateChange	7200000	USD
CY2012Q3	amg	Notes Payable Fair Value Senior Notes NotesPayableFairValueSeniorNotes	206400000	USD
CY2011Q3	amg	Payables Recorded Under Contingent Payment Arrangements PayablesRecordedUnderContingentPaymentArrangements	1400000	USD
CY2012Q3	amg	Proceeds From Issuance Of Senior Convertible Debt ProceedsFromIssuanceOfSeniorConvertibleDebt	200000000	USD
	amg	Proceeds From Issuance Of Senior Convertible Debt ProceedsFromIssuanceOfSeniorConvertibleDebt	200000000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	15200000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-300000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1200000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	16100000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	19700000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-900000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-1100000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	174800000	USD
	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	-8300000	USD
	amg	Deferred Foreign Income Tax Expense Benefit Adjustment For United Kingdom Tax Rate Change DeferredForeignIncomeTaxExpenseBenefitAdjustmentForUnitedKingdomTaxRateChange	7200000	USD
CY2012Q4	amg	Business Combination Contingent Consideration Arrangements Expected Payments BusinessCombinationContingentConsiderationArrangementsExpectedPayments	85400000	USD

Files In Submission

Name	View Source	Status
0001047469-12-010126-index-headers.html	Edgar Link	pending
0001047469-12-010126-index.html	Edgar Link	pending
0001047469-12-010126.txt	Edgar Link	pending
0001047469-12-010126-xbrl.zip	Edgar Link	pending
a2211604z10-q.htm	Edgar Link	pending
a2211604zex-31_1.htm	Edgar Link	pending
a2211604zex-31_2.htm	Edgar Link	pending
a2211604zex-32_1.htm	Edgar Link	pending
a2211604zex-32_2.htm	Edgar Link	pending
amg-20120930.xml	Edgar Link	completed
amg-20120930.xsd	Edgar Link	pending
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amg-20120930_def.xml	Edgar Link	unprocessable
amg-20120930_lab.xml	Edgar Link	unprocessable
amg-20120930_pre.xml	Edgar Link	unprocessable
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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AFFILIATED MANAGERS GROUP, INC. Stock $amg

2012 Q4 Form 10-Q Financial Statement

#000104746912010126 Filed on November 06, 2012

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMG AFFILIATED MANAGERS GROUP, INC. Stock $amg

2012 Q4 Form 10-Q Financial Statement

#000104746912010126 Filed on November 06, 2012

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMG
AFFILIATED MANAGERS GROUP, INC. Stock $amg