$AMG
AFFILIATED MANAGERS GROUP, INC. Stock $amg

$amg Overview Financials Valuation SEC Filings Company Website

2023 Q4 Form 10-Q Financial Statement

#000100443423000034 Filed on November 06, 2023

Income Statement

Concept	2023 Q4	2023 Q3
Revenue	$502.7M	$525.2M
YoY Change	-6.86%	-9.23%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin	$329.3M	$91.10M
YoY Change	-14.31%	-2.25%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$13.80M	$15.50M
YoY Change	-14.29%	-14.84%
% of Gross Profit
Operating Expenses	$352.7M	$357.4M
YoY Change	-16.58%	-15.98%
Operating Profit
YoY Change
Interest Expense	$124.1M	$31.10M
YoY Change	-58.65%	9.89%
% of Operating Profit
Other Income/Expense, Net	$0.00	$133.1M
YoY Change	-100.0%
Pretax Income	$274.1M	$363.7M
YoY Change	-74.11%	80.86%
Income Tax	$29.80M	$77.70M
% Of Pretax Income	10.87%	21.36%
Net Earnings	$196.2M	$217.0M
YoY Change	-74.78%	92.72%
Net Earnings / Revenue	39.03%	41.32%
Basic Earnings Per Share		$6.22
Diluted Earnings Per Share	$4.75	$5.48
COMMON SHARES
Basic Shares Outstanding	33.81M shares	35.05M shares
Diluted Shares Outstanding		43.40M shares

Balance Sheet

Concept	2023 Q4	2023 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$813.6M	$1.462B
YoY Change	-29.01%	81.19%
Cash & Equivalents	$813.6M	$999.2M
Short-Term Investments	$461.0M	$462.3M
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables	$368.4M	$428.9M
Other Receivables	$0.00	$0.00
Total Short-Term Assets	$1.182B	$1.428B
YoY Change	58.62%	42.72%
LONG-TERM ASSETS
Property, Plant & Equipment	$67.30M	$63.80M
YoY Change	-1.75%	-8.99%
Goodwill	$2.524B	$2.509B
YoY Change	-4.72%	-4.52%
Intangibles	$1.812B	$1.810B
YoY Change	-3.39%	-2.93%
Long-Term Investments	$3.230B	$88.40M
YoY Change	3575.09%	-7.43%
Other Assets
YoY Change
Total Long-Term Assets	$7.878B	$7.576B
YoY Change	-3.17%	1.96%
TOTAL ASSETS
Total Short-Term Assets	$1.182B	$1.428B
Total Long-Term Assets	$7.878B	$7.576B
Total Assets	$9.060B	$9.004B
YoY Change	2.01%	6.8%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$628.5M	$636.2M
YoY Change		11.79%
Accrued Expenses	$566.2M
YoY Change	2.22%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$628.5M	$636.2M
YoY Change	-19.25%	11.79%
LONG-TERM LIABILITIES
Long-Term Debt	$2.538B	$2.537B
YoY Change	0.09%	0.08%
Other Long-Term Liabilities	$466.3M	$482.3M
YoY Change	1.0%	-30.36%
Total Long-Term Liabilities	$3.004B	$3.019B
YoY Change	0.23%	-6.45%
TOTAL LIABILITIES
Total Short-Term Liabilities	$628.5M	$636.2M
Total Long-Term Liabilities	$3.004B	$3.019B
Total Liabilities	$5.472B	$4.107B
YoY Change	29.05%	-4.22%
SHAREHOLDERS EQUITY
Retained Earnings	$6.390B	$6.194B
YoY Change	11.74%	25.36%
Common Stock	$742.0M	$722.9M
YoY Change	6.59%	1.79%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$3.376B
YoY Change	13.27%
Treasury Stock Shares
Shareholders Equity	$3.588B	$3.495B
YoY Change
Total Liabilities & Shareholders Equity	$9.060B	$9.004B
YoY Change	2.01%	6.8%

Cashflow Statement

Concept	2023 Q4	2023 Q3
OPERATING ACTIVITIES
Net Income	$196.2M	$217.0M
YoY Change	-74.78%	92.72%
Depreciation, Depletion And Amortization	$13.80M	$15.50M
YoY Change	-14.29%	-14.84%
Cash From Operating Activities	$255.0M	$292.0M
YoY Change	-1.43%	0.38%
INVESTING ACTIVITIES
Capital Expenditures	$5.800M	$2.600M
YoY Change	152.17%	-186.67%
Acquisitions
YoY Change
Other Investing Activities	-$207.6M	$189.4M
YoY Change	-230.57%	-306.77%
Cash From Investing Activities	-$213.4M	$186.8M
YoY Change	-236.18%	-297.46%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-234.3M	-258.8M
YoY Change	-62.44%	58.87%
NET CHANGE
Cash From Operating Activities	255.0M	292.0M
Cash From Investing Activities	-213.4M	186.8M
Cash From Financing Activities	-234.3M	-258.8M
Net Change In Cash	-192.7M	220.0M
YoY Change	-7.53%	558.68%
FREE CASH FLOW
Cash From Operating Activities	$255.0M	$292.0M
Capital Expenditures	$5.800M	$2.600M
Free Cash Flow	$249.2M	$289.4M
YoY Change	-2.81%	-1.53%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Entity Central Index Key EntityCentralIndexKey	0001004434
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	amg	Amortizationand Impairmentsof Intangible Assets AmortizationandImpairmentsofIntangibleAssets	39400000	usd
CY2022Q3	us-gaap	Interest Expense InterestExpense	28300000	usd
CY2023Q3	us-gaap	Interest Expense InterestExpense	31100000	usd
	us-gaap	Interest Expense InterestExpense	84700000	usd
	us-gaap	Interest Expense InterestExpense	92400000	usd
CY2022Q3	amg	Depreciation And Other Amortization DepreciationAndOtherAmortization	3800000	usd
CY2023Q3	amg	Depreciation And Other Amortization DepreciationAndOtherAmortization	3000000.0	usd
	amg	Depreciation And Other Amortization DepreciationAndOtherAmortization	11900000	usd
CY2022Q3	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-11900000	usd
CY2022Q3	us-gaap	Operating Expenses OperatingExpenses	425400000	usd
CY2023Q3	us-gaap	Operating Expenses OperatingExpenses	357400000	usd
	us-gaap	Operating Expenses OperatingExpenses	1221000000	usd
CY2022Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	44800000	usd
CY2023Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	39800000	usd
	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	127.77
	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	0
CY2021	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	http://fasb.org/us-gaap/2023#AccountingStandardsUpdate202006Member
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
CY2023Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	33808636	shares
CY2022Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	578600000	usd
CY2023Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	525200000	usd
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1789900000	usd
CY2022Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	273800000	usd
CY2023Q3	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	91100000	usd
	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	275700000	usd
CY2022Q3	amg	Amortizationand Impairmentsof Intangible Assets AmortizationandImpairmentsofIntangibleAssets	14400000	usd
CY2023Q3	amg	Amortizationand Impairmentsof Intangible Assets AmortizationandImpairmentsofIntangibleAssets	12500000	usd
CY2023Q3	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-7900000	usd
	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-12300000	usd
CY2022Q3	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	usd
CY2023Q3	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	133100000	usd
	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	usd
CY2023Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	999200000	usd
CY2023Q3	us-gaap	Accounts Receivable Net AccountsReceivableNet	428900000	usd
CY2023Q3	us-gaap	Marketable Securities MarketableSecurities	462300000	usd
CY2023Q3	us-gaap	Goodwill Goodwill	2509000000	usd
CY2023Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	1809500000	usd
CY2023Q3	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	2034900000	usd
CY2023Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	63800000	usd
CY2023Q3	us-gaap	Other Investments OtherInvestments	457900000	usd
CY2023Q3	us-gaap	Other Assets OtherAssets	238100000	usd
CY2023Q3	us-gaap	Assets Assets	9003600000	usd
CY2023Q3	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	636200000	usd
CY2023Q3	us-gaap	Long Term Debt LongTermDebt	2536900000	usd
CY2023Q3	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	451700000	usd
CY2023Q3	us-gaap	Other Liabilities OtherLiabilities	482300000	usd
CY2023Q3	us-gaap	Liabilities Liabilities	4107100000	usd
CY2023Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2023Q3	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	432300000	usd
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2023Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	153000000.0	shares
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	58500000	shares
CY2023Q3	us-gaap	Common Stock Value CommonStockValue	600000	usd
CY2023Q3	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	722300000	usd
CY2023Q3	amg	Accumulated Other Comprehensive Income Loss Attributable To Parent Net Of Tax AccumulatedOtherComprehensiveIncomeLossAttributableToParentNetOfTax	-179900000	usd
CY2023Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	6193800000	usd
CY2023Q3	us-gaap	Stockholders Equity Before Treasury Stock StockholdersEquityBeforeTreasuryStock	6736800000	usd
CY2023Q3	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	24300000	shares
CY2023Q3	us-gaap	Treasury Stock Common Value TreasuryStockCommonValue	3241800000	usd
CY2023Q3	us-gaap	Stockholders Equity StockholdersEquity	3495000000	usd
CY2023Q3	us-gaap	Other Minority Interests OtherMinorityInterests	969200000	usd
CY2023Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4464200000	usd
CY2023Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	9003600000	usd
CY2022Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3643800000	usd
CY2022Q3	us-gaap	Profit Loss ProfitLoss	164300000	usd
CY2022Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-88400000	usd
CY2022Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	15200000	usd
CY2022Q3	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-5100000	usd
CY2022Q3	amg	Noncontrolling Interest Increase Decrease From Contributions From Affiliate And Other NoncontrollingInterestIncreaseDecreaseFromContributionsFromAffiliateAndOther	5200000	usd
CY2022Q3	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	66200000	usd
CY2022Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3655400000	usd
CY2023Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4368400000	usd
CY2023Q3	us-gaap	Profit Loss ProfitLoss	286000000.0	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-30300000	usd
CY2023Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	14500000	usd
CY2023Q3	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-6100000	usd
CY2023Q3	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	173100000	usd
CY2023Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.01
CY2023Q3	us-gaap	Dividends Dividends	400000	usd
CY2023Q3	amg	Affiliate Equity Compensation Expense Including Adjustmentsand Portion Attributableto Noncontrolling Interest AffiliateEquityCompensationExpenseIncludingAdjustmentsandPortionAttributabletoNoncontrollingInterest	12500000	usd
CY2023Q3	amg	Noncontrolling Interest Increase Decrease From Subsidiary Equity Issuance NoncontrollingInterestIncreaseDecreaseFromSubsidiaryEquityIssuance	1600000	usd
CY2023Q3	amg	Noncontrolling Interest Increase Decreasefrom Purchaseof Interests NoncontrollingInterestIncreaseDecreasefromPurchaseofInterests	-600000	usd
CY2023Q3	amg	Redeemable Noncontrolling Interest Equity Change In Redemption Value RedeemableNoncontrollingInterestEquityChangeInRedemptionValue	50300000	usd
CY2023Q3	amg	Noncontrolling Interest Increase Decrease From Contributions From Affiliate And Other NoncontrollingInterestIncreaseDecreaseFromContributionsFromAffiliateAndOther	1800000	usd
CY2023Q3	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	60000000.0	usd
CY2023Q3	us-gaap	Noncontrolling Interest Decrease From Deconsolidation NoncontrollingInterestDecreaseFromDeconsolidation	400000	usd
	us-gaap	Profit Loss ProfitLoss	557000000.0	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-174200000	usd
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	45000000.0	usd
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-17300000	usd
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	344700000	usd
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.03
	us-gaap	Dividends Dividends	1300000	usd
	amg	Affiliate Equity Compensation Expense Including Adjustmentsand Portion Attributableto Noncontrolling Interest AffiliateEquityCompensationExpenseIncludingAdjustmentsandPortionAttributabletoNoncontrollingInterest	39700000	usd
	amg	Noncontrolling Interest Increase Decrease From Subsidiary Equity Issuance NoncontrollingInterestIncreaseDecreaseFromSubsidiaryEquityIssuance	19300000	usd
	amg	Noncontrolling Interest Increase Decreasefrom Purchaseof Interests NoncontrollingInterestIncreaseDecreasefromPurchaseofInterests	-5100000	usd
	amg	Redeemable Noncontrolling Interest Equity Change In Redemption Value RedeemableNoncontrollingInterestEquityChangeInRedemptionValue	142900000	usd
	amg	Noncontrolling Interest Decreasefrom Transfersto Noncontrolling Interest Holders NoncontrollingInterestDecreasefromTransferstoNoncontrollingInterestHolders	1800000	usd
	amg	Noncontrolling Interest Increase Decrease From Contributions From Affiliate And Other NoncontrollingInterestIncreaseDecreaseFromContributionsFromAffiliateAndOther	39400000	usd
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	278000000.0	usd
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	218000000.0	usd
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.03
	us-gaap	Dividends Dividends	1200000	usd
	amg	Affiliate Equity Compensation Expense Including Adjustmentsand Portion Attributableto Noncontrolling Interest AffiliateEquityCompensationExpenseIncludingAdjustmentsandPortionAttributabletoNoncontrollingInterest	41100000	usd
	amg	Noncontrolling Interest Increase Decrease From Subsidiary Equity Issuance NoncontrollingInterestIncreaseDecreaseFromSubsidiaryEquityIssuance	16300000	usd
	amg	Noncontrolling Interest Increase Decreasefrom Purchaseof Interests NoncontrollingInterestIncreaseDecreasefromPurchaseofInterests	3800000	usd
	amg	Redeemable Noncontrolling Interest Equity Change In Redemption Value RedeemableNoncontrollingInterestEquityChangeInRedemptionValue	-46900000	usd
	amg	Noncontrolling Interest Decreasefrom Transfersto Noncontrolling Interest Holders NoncontrollingInterestDecreasefromTransferstoNoncontrollingInterestHolders	100000	usd
	amg	Noncontrolling Interest Increase Decrease From Contributions From Affiliate And Other NoncontrollingInterestIncreaseDecreaseFromContributionsFromAffiliateAndOther	14400000	usd
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	216400000	usd
	us-gaap	Noncontrolling Interest Decrease From Deconsolidation NoncontrollingInterestDecreaseFromDeconsolidation	400000	usd
CY2023Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4464200000	usd
	us-gaap	Profit Loss ProfitLoss	557000000.0	usd
	us-gaap	Profit Loss ProfitLoss	661900000	usd
	amg	Amortizationand Impairmentsof Intangible Assets AmortizationandImpairmentsofIntangibleAssets	39400000	usd
	amg	Amortizationand Impairmentsof Intangible Assets AmortizationandImpairmentsofIntangibleAssets	37500000	usd
	amg	Depreciation And Other Amortization DepreciationAndOtherAmortization	11900000	usd
	amg	Depreciation And Other Amortization DepreciationAndOtherAmortization	10000000.0	usd
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	47800000	usd
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	13000000.0	usd
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	123900000	usd
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	154300000	usd
	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	usd
	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	133100000	usd
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	339700000	usd
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	421700000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	80900000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	83400000	usd
	us-gaap	Gain Loss On Investments GainLossOnInvestments	-3000000.0	usd
	us-gaap	Gain Loss On Investments GainLossOnInvestments	68700000	usd
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	1000000.0	usd
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	3700000	usd
	amg	Purchasesof Securitiesby Affiliate Sponsored Consolidated Products PurchasesofSecuritiesbyAffiliateSponsoredConsolidatedProducts	34500000	usd
	amg	Purchasesof Securitiesby Affiliate Sponsored Consolidated Products PurchasesofSecuritiesbyAffiliateSponsoredConsolidatedProducts	32600000	usd
	amg	Saleof Securitiesby Affiliate Sponsored Consolidated Products SaleofSecuritiesbyAffiliateSponsoredConsolidatedProducts	24500000	usd
	amg	Saleof Securitiesby Affiliate Sponsored Consolidated Products SaleofSecuritiesbyAffiliateSponsoredConsolidatedProducts	38900000	usd
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-9500000	usd
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	116400000	usd
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-19300000	usd
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-23300000	usd
	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	-176200000	usd
	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	-161500000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	797400000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	619400000	usd
	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	147800000	usd
	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	93800000	usd
	us-gaap	Proceeds From Divestiture Of Interest In Subsidiaries And Affiliates ProceedsFromDivestitureOfInterestInSubsidiariesAndAffiliates	0	usd
	us-gaap	Proceeds From Divestiture Of Interest In Subsidiaries And Affiliates ProceedsFromDivestitureOfInterestInSubsidiariesAndAffiliates	294000000.0	usd
	amg	Proceeds From Equity Method Investment Return Of Capital ProceedsFromEquityMethodInvestmentReturnOfCapital	800000	usd
	amg	Proceeds From Equity Method Investment Return Of Capital ProceedsFromEquityMethodInvestmentReturnOfCapital	0	usd
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	9100000	usd
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	6600000	usd
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	147200000	usd
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	477600000	usd
	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	36700000	usd
	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	761900000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-266600000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	477900000	usd
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	usd
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	25000000.0	usd
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	60800000	usd
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	25000000.0	usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	353100000	usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	213600000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	1200000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	1200000	usd
	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	278000000.0	usd
	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	216400000	usd
	amg	Proceeds From Payments For Affiliate Equity Issuances And Repurchases ProceedsFromPaymentsForAffiliateEquityIssuancesAndRepurchases	-21800000	usd
	amg	Proceeds From Payments For Affiliate Equity Issuances And Repurchases ProceedsFromPaymentsForAffiliateEquityIssuancesAndRepurchases	-28300000	usd
	amg	Subscriptions To Consolidated Affiliate Sponsored Investment Products Net Of Redemptions SubscriptionsToConsolidatedAffiliateSponsoredInvestmentProductsNetOfRedemptions	6500000	usd
	amg	Subscriptions To Consolidated Affiliate Sponsored Investment Products Net Of Redemptions SubscriptionsToConsolidatedAffiliateSponsoredInvestmentProductsNetOfRedemptions	-9700000	usd
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-70700000	usd
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-54800000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-779100000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-524000000.0	usd
	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-37300000	usd
	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-200000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-285600000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	573100000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	908500000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	429200000	usd
CY2022Q3	amg	Reduction To Cash Due To Deconsolidation Affiliates And Affiliate Sponsored Investment Products ReductionToCashDueToDeconsolidationAffiliatesAndAffiliateSponsoredInvestmentProducts	0	usd
CY2023Q3	amg	Reduction To Cash Due To Deconsolidation Affiliates And Affiliate Sponsored Investment Products ReductionToCashDueToDeconsolidationAffiliatesAndAffiliateSponsoredInvestmentProducts	3100000	usd
CY2022Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	622900000	usd
CY2023Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	999200000	usd
	us-gaap	Use Of Estimates UseOfEstimates	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts and disclosures in the financial statements. Actual results could differ from those estimates.
CY2022Q4	us-gaap	Equity Securities Fv Ni Cost EquitySecuritiesFvNiCost	394400000	usd
CY2023Q3	us-gaap	Equity Securities Fv Ni Cost EquitySecuritiesFvNiCost	44200000	usd
CY2022	us-gaap	Equity Securities Fv Ni Unrealized Gain EquitySecuritiesFvNiUnrealizedGain	59900000	usd
	us-gaap	Equity Securities Fv Ni Unrealized Gain EquitySecuritiesFvNiUnrealizedGain	2600000	usd
CY2022	us-gaap	Equity Securities Fv Ni Unrealized Loss EquitySecuritiesFvNiUnrealizedLoss	6400000	usd
	us-gaap	Equity Securities Fv Ni Unrealized Loss EquitySecuritiesFvNiUnrealizedLoss	1800000	usd
CY2022Q4	us-gaap	Equity Securities Fv Ni Current And Noncurrent EquitySecuritiesFvNiCurrentAndNoncurrent	447900000	usd
CY2023Q3	us-gaap	Equity Securities Fv Ni Current And Noncurrent EquitySecuritiesFvNiCurrentAndNoncurrent	45000000.0	usd
CY2022Q3	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	3600000	usd
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-21600000	usd
CY2023Q3	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-2100000	usd
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	1300000	usd
CY2023Q3	amg	Debt Securities Available For Sale Maturity Year One DebtSecuritiesAvailableForSaleMaturityYearOne	228300000	usd
CY2023Q3	amg	Debt Securities Available For Sale Maturity Year Two DebtSecuritiesAvailableForSaleMaturityYearTwo	171900000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	252300000	usd
CY2023Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	400700000	usd
CY2022Q4	us-gaap	Trading Securities Debt Amortized Cost TradingSecuritiesDebtAmortizedCost	19700000	usd
CY2023Q3	us-gaap	Trading Securities Debt Amortized Cost TradingSecuritiesDebtAmortizedCost	18300000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	0	usd
CY2023Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	100000	usd
CY2022Q4	amg	Debt Securities Trading Accumulated Gross Unrealized Gain Before Tax DebtSecuritiesTradingAccumulatedGrossUnrealizedGainBeforeTax	0	usd
CY2023Q3	amg	Debt Securities Trading Accumulated Gross Unrealized Gain Before Tax DebtSecuritiesTradingAccumulatedGrossUnrealizedGainBeforeTax	0	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1300000	usd
CY2023Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	600000	usd
CY2022Q4	amg	Debt Securities Trading Accumulated Gross Unrealized Loss Before Tax DebtSecuritiesTradingAccumulatedGrossUnrealizedLossBeforeTax	1700000	usd
CY2023Q3	amg	Debt Securities Trading Accumulated Gross Unrealized Loss Before Tax DebtSecuritiesTradingAccumulatedGrossUnrealizedLossBeforeTax	1200000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	251000000.0	usd
CY2023Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	400200000	usd
CY2022Q4	us-gaap	Trading Securities Debt TradingSecuritiesDebt	18000000.0	usd
CY2023Q3	us-gaap	Trading Securities Debt TradingSecuritiesDebt	17100000	usd
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	0	usd
CY2022Q3	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	0	usd
CY2023Q3	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	178400000	usd
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	280100000	usd
CY2022Q3	us-gaap	Debt Securities Trading Unrealized Gain Loss DebtSecuritiesTradingUnrealizedGainLoss	-800000	usd
	us-gaap	Debt Securities Trading Unrealized Gain Loss DebtSecuritiesTradingUnrealizedGainLoss	-3500000	usd
CY2023Q3	us-gaap	Debt Securities Trading Unrealized Gain Loss DebtSecuritiesTradingUnrealizedGainLoss	0	usd
	us-gaap	Debt Securities Trading Unrealized Gain Loss DebtSecuritiesTradingUnrealizedGainLoss	0	usd
CY2022Q4	us-gaap	Fair Value Investments Entities That Calculate Net Asset Value Per Share Unfunded Committments FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments	158300000	usd
CY2023Q3	us-gaap	Fair Value Investments Entities That Calculate Net Asset Value Per Share Unfunded Committments FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments	151700000	usd
	amg	Fair Value Investments Entities That Calculate Na Vs Lifeof Fund FairValueInvestmentsEntitiesThatCalculateNAVsLifeofFund	P15Y
CY2022Q4	amg	Equity Securities Without Readily Determinable Fair Value Cost EquitySecuritiesWithoutReadilyDeterminableFairValueCost	8500000	usd
CY2023Q3	amg	Equity Securities Without Readily Determinable Fair Value Cost EquitySecuritiesWithoutReadilyDeterminableFairValueCost	8500000	usd
CY2022Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Cumulative Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentCumulativeAmount	41900000	usd
CY2023Q3	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Cumulative Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentCumulativeAmount	41900000	usd
CY2022Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	50400000	usd
CY2023Q3	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	0	usd
	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	0	usd
CY2022Q2	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	50400000	usd
CY2022Q2	us-gaap	Other Investments OtherInvestments	384700000	usd
CY2023Q2	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	50400000	usd
CY2023Q2	us-gaap	Other Investments OtherInvestments	457000000.0	usd
CY2022Q3	amg	Equity Securities Without Readily Determinable Fair Value Purchases And Commitments EquitySecuritiesWithoutReadilyDeterminableFairValuePurchasesAndCommitments	0	usd
CY2022Q3	amg	Other Investments Purchases OtherInvestmentsPurchases	11200000	usd
CY2023Q3	amg	Equity Securities Without Readily Determinable Fair Value Purchases And Commitments EquitySecuritiesWithoutReadilyDeterminableFairValuePurchasesAndCommitments	0	usd
CY2023Q3	amg	Other Investments Purchases OtherInvestmentsPurchases	16000000.0	usd
CY2022Q3	amg	Equity Securities Without Readily Determinable Fair Value Sales And Distributions EquitySecuritiesWithoutReadilyDeterminableFairValueSalesAndDistributions	0	usd
CY2022Q3	amg	Other Investments Sales OtherInvestmentsSales	31800000	usd
CY2023Q3	amg	Equity Securities Without Readily Determinable Fair Value Sales And Distributions EquitySecuritiesWithoutReadilyDeterminableFairValueSalesAndDistributions	0	usd
CY2023Q3	amg	Other Investments Sales OtherInvestmentsSales	20500000	usd
CY2022Q3	amg	Equity Securities Without Readily Determinable Fair Value Net Gain Loss EquitySecuritiesWithoutReadilyDeterminableFairValueNetGainLoss	0	usd
CY2022Q3	amg	Other Investments Gain Loss Net OtherInvestmentsGainLossNet	-10400000	usd
CY2023Q3	amg	Equity Securities Without Readily Determinable Fair Value Net Gain Loss EquitySecuritiesWithoutReadilyDeterminableFairValueNetGainLoss	0	usd
CY2023Q3	amg	Other Investments Gain Loss Net OtherInvestmentsGainLossNet	5400000	usd
CY2023Q3	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	50400000	usd
CY2023Q3	us-gaap	Other Investments OtherInvestments	457900000	usd
CY2021Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	50400000	usd
CY2021Q4	us-gaap	Other Investments OtherInvestments	375200000	usd
CY2022Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	50400000	usd
CY2022Q4	us-gaap	Other Investments OtherInvestments	421600000	usd
	amg	Equity Securities Without Readily Determinable Fair Value Purchases And Commitments EquitySecuritiesWithoutReadilyDeterminableFairValuePurchasesAndCommitments	0	usd
	amg	Other Investments Purchases OtherInvestmentsPurchases	62000000.0	usd
	amg	Equity Securities Without Readily Determinable Fair Value Sales And Distributions EquitySecuritiesWithoutReadilyDeterminableFairValueSalesAndDistributions	0	usd
	amg	Other Investments Sales OtherInvestmentsSales	49400000	usd
	amg	Equity Securities Without Readily Determinable Fair Value Net Gain Loss EquitySecuritiesWithoutReadilyDeterminableFairValueNetGainLoss	0	usd
	amg	Other Investments Gain Loss Net OtherInvestmentsGainLossNet	-8800000	usd
	amg	Equity Securities Without Readily Determinable Fair Value Net Gain Loss EquitySecuritiesWithoutReadilyDeterminableFairValueNetGainLoss	0	usd
	amg	Other Investments Gain Loss Net OtherInvestmentsGainLossNet	23700000	usd
CY2022Q3	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	50400000	usd
CY2022Q3	us-gaap	Other Investments OtherInvestments	353700000	usd
CY2023Q3	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	50400000	usd
CY2023Q3	us-gaap	Other Investments OtherInvestments	457900000	usd
CY2022Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	2139500000	usd
CY2023Q3	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	2034900000	usd
CY2022Q4	us-gaap	Equity Method Investments EquityMethodInvestments	87900000	usd
CY2023Q3	us-gaap	Equity Method Investments EquityMethodInvestments	88400000	usd
CY2022Q4	us-gaap	Long Term Debt LongTermDebt	2535300000	usd
CY2023Q3	us-gaap	Long Term Debt LongTermDebt	2536900000	usd
CY2023Q3	amg	Investment Commitment Amount InvestmentCommitmentAmount	151700000	usd
CY2023Q3	amg	Deferred Payment Obligations Liability DeferredPaymentObligationsLiability	65000000.0	usd
CY2023Q3	amg	Deferred Payment Obligations Liability To Be Paid Year One DeferredPaymentObligationsLiabilityToBePaidYearOne	21700000	usd
CY2023Q3	amg	Deferred Payment Obligations Liability To Be Paid Year Two DeferredPaymentObligationsLiabilityToBePaidYearTwo	43300000	usd
CY2023Q3	amg	Deferred Payment Obligations Liability To Be Paid Year Three DeferredPaymentObligationsLiabilityToBePaidYearThree	0	usd
CY2023Q3	amg	Contingent Consideration Liability ContingentConsiderationLiability	18200000	usd
CY2023Q3	amg	Contingent Consideration Liability To Be Paid Year One ContingentConsiderationLiabilityToBePaidYearOne	0	usd
CY2023Q3	amg	Contingent Consideration Liability To Be Paid Year Two ContingentConsiderationLiabilityToBePaidYearTwo	14300000	usd
CY2023Q3	amg	Contingent Consideration Liability To Be Paid Year Three ContingentConsiderationLiabilityToBePaidYearThree	3900000	usd
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	0	shares
CY2022Q4	us-gaap	Goodwill Goodwill	2648700000	usd
	amg	Goodwill Deconsolidated GoodwillDeconsolidated	136500000	usd
	us-gaap	Goodwill Other Increase Decrease GoodwillOtherIncreaseDecrease	1900000	usd
	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-5100000	usd
CY2023Q3	us-gaap	Goodwill Goodwill	2509000000	usd
	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2023Q3	amg	Proceeds From Divestiture Of Interest In Subsidiaries And Affiliates Net Of Transaction Costs ProceedsFromDivestitureOfInterestInSubsidiariesAndAffiliatesNetOfTransactionCosts	287400000	usd
CY2023Q3	amg	Divestiture Of Business Transaction Costs DivestitureOfBusinessTransactionCosts	6600000	usd
CY2023Q3	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	133100000	usd
CY2023Q3	amg	Proceeds From Divestiture Of Businesses Net Cash Proceeds After Tax ProceedsFromDivestitureOfBusinessesNetCashProceedsAfterTax	225100000	usd
CY2022Q4	amg	Number Of Affiliates Equity Method Investment NumberOfAffiliatesEquityMethodInvestment	20	affiliate
CY2023Q3	amg	Number Of Affiliates Equity Method Investment NumberOfAffiliatesEquityMethodInvestment	21	affiliate
CY2023Q3	amg	Common Stock Voting Rights Percent CommonStockVotingRightsPercent	0.05
CY2022Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	15200000	usd
CY2023Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	14500000	usd
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	45000000.0	usd
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	43900000	usd
CY2022Q3	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2000000.0	usd
CY2023Q3	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1900000	usd
	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	5600000	usd
	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	5500000	usd
CY2022Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	64700000	usd
CY2023Q3	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	68300000	usd
	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P3Y
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	3200000	shares
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	76.81
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0
	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	0.0	shares
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	0	shares
	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	0
	amg	Share Based Compensation Arrangement By Sharebased Payment Award Options Period Increase Decrease Performance Condition Changes ShareBasedCompensationArrangementBySharebasedPaymentAwardOptionsPeriodIncreaseDecreasePerformanceConditionChanges	0	shares
	amg	Sharebased Compensation Arrangementsby Sharebased Payment Award Options Performance Condition Changes Weighted Average Exercise Price SharebasedCompensationArrangementsbySharebasedPaymentAwardOptionsPerformanceConditionChangesWeightedAverageExercisePrice	0
CY2023Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	3200000	shares
CY2023Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	76.74
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P3Y
CY2023Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	0.0	shares
CY2023Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	119.54
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P3Y
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	1800000	usd
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	0	usd
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	47.84
CY2022Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	465400000	usd
	amg	Noncontrolling Interest Decrease From Affiliate Transaction NoncontrollingInterestDecreaseFromAffiliateTransaction	16800000	usd
	amg	Noncontrolling Interest Increasedecrease Attributableto Consolidated Partnerships NoncontrollingInterestIncreasedecreaseAttributabletoConsolidatedPartnerships	-6200000	usd
	amg	Noncontrolling Interest Decreasefrom Transfersto Other Liabilities NoncontrollingInterestDecreasefromTransferstoOtherLiabilities	-57100000	usd
	amg	Noncontrolling Interest Increase From Transfers To Noncontrolling Interest Holders NoncontrollingInterestIncreaseFromTransfersToNoncontrollingInterestHolders	100000	usd
	amg	Redeemable Noncontrolling Interest Equity Change In Redemption Value RedeemableNoncontrollingInterestEquityChangeInRedemptionValue	-46900000	usd
CY2023Q3	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	432300000	usd
	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	278000000	usd
	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	216400000	usd
	us-gaap	Payments To Acquire Businesses And Interest In Affiliates PaymentsToAcquireBusinessesAndInterestInAffiliates	37000000	usd
	us-gaap	Payments To Acquire Businesses And Interest In Affiliates PaymentsToAcquireBusinessesAndInterestInAffiliates	41700000	usd
	us-gaap	Proceeds From Divestiture Of Businesses And Interests In Affiliates ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates	15200000	usd
	us-gaap	Proceeds From Divestiture Of Businesses And Interests In Affiliates ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates	13400000	usd
CY2022Q3	amg	Affiliate Equity Compensation Expense Including Portion Attributableto Noncontrolling Interest AffiliateEquityCompensationExpenseIncludingPortionAttributabletoNoncontrollingInterest	9000000.0	usd
CY2023Q3	amg	Affiliate Equity Compensation Expense Including Portion Attributableto Noncontrolling Interest AffiliateEquityCompensationExpenseIncludingPortionAttributabletoNoncontrollingInterest	11500000	usd
	amg	Affiliate Equity Compensation Expense Including Portion Attributableto Noncontrolling Interest AffiliateEquityCompensationExpenseIncludingPortionAttributabletoNoncontrollingInterest	35900000	usd
	amg	Affiliate Equity Compensation Expense Including Portion Attributableto Noncontrolling Interest AffiliateEquityCompensationExpenseIncludingPortionAttributabletoNoncontrollingInterest	39500000	usd
CY2022Q3	us-gaap	Net Income Loss NetIncomeLoss	112600000	usd
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	217000000.0	usd
	us-gaap	Net Income Loss NetIncomeLoss	368000000.0	usd
	us-gaap	Net Income Loss NetIncomeLoss	476800000	usd
CY2022Q3	amg	Adjustments To Additional Paid In Capital Increase Decrease In Carrying Amount Of Redeemable Noncontrolling Interests Issuances AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterestsIssuances	5100000	usd
CY2023Q3	amg	Adjustments To Additional Paid In Capital Increase Decrease In Carrying Amount Of Redeemable Noncontrolling Interests Issuances AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterestsIssuances	4500000	usd
	amg	Adjustments To Additional Paid In Capital Increase Decrease In Carrying Amount Of Redeemable Noncontrolling Interests Issuances AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterestsIssuances	200000	usd
	amg	Adjustments To Additional Paid In Capital Increase Decrease In Carrying Amount Of Redeemable Noncontrolling Interests Issuances AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterestsIssuances	13100000	usd
CY2022Q3	amg	Adjustments To Additional Paid In Capital Increase Decrease In Carrying Amount Of Redeemable Noncontrolling Interests Purchases AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterestsPurchases	2300000	usd
CY2023Q3	amg	Adjustments To Additional Paid In Capital Increase Decrease In Carrying Amount Of Redeemable Noncontrolling Interests Purchases AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterestsPurchases	-1900000	usd
	amg	Adjustments To Additional Paid In Capital Increase Decrease In Carrying Amount Of Redeemable Noncontrolling Interests Purchases AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterestsPurchases	32200000	usd
	amg	Adjustments To Additional Paid In Capital Increase Decrease In Carrying Amount Of Redeemable Noncontrolling Interests Purchases AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterestsPurchases	36100000	usd
CY2022Q3	amg	Increase Decrease In Equity Due To Profit Loss And Net Transfers With Noncontrolling Interests IncreaseDecreaseInEquityDueToProfitLossAndNetTransfersWithNoncontrollingInterests	105200000	usd
CY2023Q3	amg	Increase Decrease In Equity Due To Profit Loss And Net Transfers With Noncontrolling Interests IncreaseDecreaseInEquityDueToProfitLossAndNetTransfersWithNoncontrollingInterests	214400000	usd
	amg	Increase Decrease In Equity Due To Profit Loss And Net Transfers With Noncontrolling Interests IncreaseDecreaseInEquityDueToProfitLossAndNetTransfersWithNoncontrollingInterests	335600000	usd
	amg	Increase Decrease In Equity Due To Profit Loss And Net Transfers With Noncontrolling Interests IncreaseDecreaseInEquityDueToProfitLossAndNetTransfersWithNoncontrollingInterests	427600000	usd
CY2022Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	36800000	usd
CY2023Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	77700000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	130500000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	155400000	usd
CY2022Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	112600000	usd
CY2023Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	217000000.0	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	368000000.0	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	476800000	usd
CY2022Q3	amg	Net Income Loss Other Noncontrolling Interests Redeemable NetIncomeLossOtherNoncontrollingInterestsRedeemable	5800000	usd
CY2023Q3	amg	Net Income Loss Other Noncontrolling Interests Redeemable NetIncomeLossOtherNoncontrollingInterestsRedeemable	17100000	usd
	amg	Net Income Loss Other Noncontrolling Interests Redeemable NetIncomeLossOtherNoncontrollingInterestsRedeemable	43400000	usd
	amg	Net Income Loss Other Noncontrolling Interests Redeemable NetIncomeLossOtherNoncontrollingInterestsRedeemable	39400000	usd
CY2022Q3	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	3400000	usd
CY2023Q3	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	3400000	usd
	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	10600000	usd
	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	10100000	usd
CY2022Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	121800000	usd
CY2023Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	237500000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	422000000.0	usd
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	526300000	usd
CY2022Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	38200000	shares
CY2023Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	34900000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	38800000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	35600000	shares
CY2022Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1300000	shares
CY2023Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1700000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1400000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1700000	shares
CY2022Q3	amg	Settlement Of Redeemable Non Controlling Interests Shares Issued SettlementOfRedeemableNonControllingInterestsSharesIssued	2300000	shares
CY2023Q3	amg	Settlement Of Redeemable Non Controlling Interests Shares Issued SettlementOfRedeemableNonControllingInterestsSharesIssued	5100000	shares
	amg	Settlement Of Redeemable Non Controlling Interests Shares Issued SettlementOfRedeemableNonControllingInterestsSharesIssued	5700000	shares
	amg	Settlement Of Redeemable Non Controlling Interests Shares Issued SettlementOfRedeemableNonControllingInterestsSharesIssued	3900000	shares
CY2022Q3	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	1700000	shares
CY2023Q3	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	1700000	shares
	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	1900000	shares
	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	1700000	shares
CY2022Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	43500000	shares
CY2023Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	43400000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	47800000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	42900000	shares
CY2023Q3	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	1200000	shares
	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	2000000	shares
CY2023Q3	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	137.34
	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	132.90
CY2022Q4	amg	Accelerated Share Repurchase Upfront Payment AcceleratedShareRepurchaseUpfrontPayment	225000000	usd
CY2022Q4	amg	Accelerated Share Repurchase Stock Repurchased During Period Shares AcceleratedShareRepurchaseStockRepurchasedDuringPeriodShares	1100000	shares
CY2022Q4	amg	Accelerated Share Repurchase Percentage Of Shares Received AcceleratedShareRepurchasePercentageOfSharesReceived	0.80
CY2023Q2	amg	Accelerated Share Repurchase Stock Repurchased During Period Shares AcceleratedShareRepurchaseStockRepurchasedDuringPeriodShares	400000	shares
CY2023Q2	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	1500000	shares
CY2023Q2	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	147.29
CY2022Q3	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-93300000	usd
CY2022Q3	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-4900000	usd
CY2022Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-88400000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-27300000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	3000000.0	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-30300000	usd
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-177000000.0	usd
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-2800000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-174200000	usd
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	28300000	usd
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	6800000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	21500000	usd
	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	21600000	usd
	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	100000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	21500000	usd

Files In Submission

Name	View Source	Status
0001004434-23-000034-index-headers.html	Edgar Link	pending
0001004434-23-000034-index.html	Edgar Link	pending
0001004434-23-000034.txt	Edgar Link	pending
0001004434-23-000034-xbrl.zip	Edgar Link	pending
amg-20230930.htm	Edgar Link	pending
amg-20230930.xsd	Edgar Link	pending
amg-20230930_g1.gif	Edgar Link	pending
amg-20230930_g2.jpg	Edgar Link	pending
amg_09302023xexhibit311.htm	Edgar Link	pending
amg_09302023xexhibit312.htm	Edgar Link	pending
amg_09302023xexhibit321.htm	Edgar Link	pending
amg_09302023xexhibit322.htm	Edgar Link	pending
amg-20230930_lab.xml	Edgar Link	unprocessable
amg-20230930_cal.xml	Edgar Link	unprocessable
amg-20230930_def.xml	Edgar Link	unprocessable
amg-20230930_pre.xml	Edgar Link	unprocessable
FilingSummary.xml	Edgar Link	unprocessable
amg-20230930_htm.xml	Edgar Link	completed
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R66.htm	Edgar Link	pending
R67.htm	Edgar Link	pending
R68.htm	Edgar Link	pending
R69.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R70.htm	Edgar Link	pending
R71.htm	Edgar Link	pending
R72.htm	Edgar Link	pending
R73.htm	Edgar Link	pending
R74.htm	Edgar Link	pending
R75.htm	Edgar Link	pending
R76.htm	Edgar Link	pending
R77.htm	Edgar Link	pending
R78.htm	Edgar Link	pending
R79.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R80.htm	Edgar Link	pending
R81.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
R9999.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$AMG
AFFILIATED MANAGERS GROUP, INC. Stock $amg

2023 Q4 Form 10-Q Financial Statement

#000100443423000034 Filed on November 06, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMG AFFILIATED MANAGERS GROUP, INC. Stock $amg

2023 Q4 Form 10-Q Financial Statement

#000100443423000034 Filed on November 06, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMG
AFFILIATED MANAGERS GROUP, INC. Stock $amg