$AMG
AFFILIATED MANAGERS GROUP, INC. Stock $amg

$amg Overview Financials Valuation SEC Filings Company Website

2023 Q3 Form 10-Q Financial Statement

#000100443423000025 Filed on August 07, 2023

Income Statement

Concept	2023 Q3	2023 Q2
Revenue	$525.2M	$512.5M
YoY Change	-9.23%	-15.16%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin	$91.10M	$314.1M
YoY Change	-2.25%	237.38%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$15.50M	$15.80M
YoY Change	-14.84%	-7.6%
% of Gross Profit
Operating Expenses	$357.4M	$343.7M
YoY Change	-15.98%	-14.2%
Operating Profit
YoY Change
Interest Expense	$31.10M	$51.40M
YoY Change	9.89%	88.28%
% of Operating Profit
Other Income/Expense, Net	$133.1M
YoY Change
Pretax Income	$363.7M	$220.2M
YoY Change	80.86%	3.87%
Income Tax	$77.70M	$32.80M
% Of Pretax Income	21.36%	14.9%
Net Earnings	$217.0M	$125.3M
YoY Change	92.72%	14.53%
Net Earnings / Revenue	41.32%	24.45%
Basic Earnings Per Share	$6.22	$3.49
Diluted Earnings Per Share	$5.48	$2.98
COMMON SHARES
Basic Shares Outstanding	35.05M shares	36.10M shares
Diluted Shares Outstanding	43.40M shares	42.10M shares

Balance Sheet

Concept	2023 Q3	2023 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.462B	$785.5M
YoY Change	81.19%	16.65%
Cash & Equivalents	$999.2M	$785.5M
Short-Term Investments	$462.3M	$444.2M
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables	$428.9M	$487.1M
Other Receivables	$0.00	$0.00
Total Short-Term Assets	$1.428B	$1.273B
YoY Change	42.72%	26.5%
LONG-TERM ASSETS
Property, Plant & Equipment	$63.80M	$66.30M
YoY Change	-8.99%	-7.01%
Goodwill	$2.509B	$2.660B
YoY Change	-4.52%	-0.02%
Intangibles	$1.810B	$1.863B
YoY Change	-2.93%	-2.21%
Long-Term Investments	$88.40M	$2.845B
YoY Change	-7.43%	2662.14%
Other Assets
YoY Change
Total Long-Term Assets	$7.576B	$7.694B
YoY Change	1.96%	3.09%
TOTAL ASSETS
Total Short-Term Assets	$1.428B	$1.273B
Total Long-Term Assets	$7.576B	$7.694B
Total Assets	$9.004B	$8.966B
YoY Change	6.8%	5.87%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$636.2M	$602.5M
YoY Change	11.79%	9.89%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$636.2M	$602.5M
YoY Change	11.79%	9.89%
LONG-TERM LIABILITIES
Long-Term Debt	$2.537B	$2.536B
YoY Change	0.08%	0.08%
Other Long-Term Liabilities	$482.3M	$470.3M
YoY Change	-30.36%	-32.9%
Total Long-Term Liabilities	$3.019B	$3.007B
YoY Change	-6.45%	-7.06%
TOTAL LIABILITIES
Total Short-Term Liabilities	$636.2M	$602.5M
Total Long-Term Liabilities	$3.019B	$3.007B
Total Liabilities	$4.107B	$5.568B
YoY Change	-4.22%	30.18%
SHAREHOLDERS EQUITY
Retained Earnings	$6.194B	$5.977B
YoY Change	25.36%	23.79%
Common Stock	$722.9M	$652.5M
YoY Change	1.79%	0.02%
Preferred Stock
YoY Change
Treasury Stock (at cost)		$3.071B
YoY Change		18.36%
Treasury Stock Shares
Shareholders Equity	$3.495B	$3.398B
YoY Change
Total Liabilities & Shareholders Equity	$9.004B	$8.966B
YoY Change	6.8%	5.87%

Cashflow Statement

Concept	2023 Q3	2023 Q2
OPERATING ACTIVITIES
Net Income	$217.0M	$125.3M
YoY Change	92.72%	14.53%
Depreciation, Depletion And Amortization	$15.50M	$15.80M
YoY Change	-14.84%	-7.6%
Cash From Operating Activities	$292.0M	$94.40M
YoY Change	0.38%	-73.89%
INVESTING ACTIVITIES
Capital Expenditures	$2.600M	$2.100M
YoY Change	-186.67%	-187.5%
Acquisitions
YoY Change
Other Investing Activities	$189.4M	$5.200M
YoY Change	-306.77%	-142.62%
Cash From Investing Activities	$186.8M	$3.100M
YoY Change	-297.46%	-121.23%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-258.8M	-148.3M
YoY Change	58.87%	-34.76%
NET CHANGE
Cash From Operating Activities	292.0M	94.40M
Cash From Investing Activities	186.8M	3.100M
Cash From Financing Activities	-258.8M	-148.3M
Net Change In Cash	220.0M	-50.80M
YoY Change	558.68%	-142.47%
FREE CASH FLOW
Cash From Operating Activities	$292.0M	$94.40M
Capital Expenditures	$2.600M	$2.100M
Free Cash Flow	$289.4M	$92.30M
YoY Change	-1.53%	-74.64%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	http://fasb.org/us-gaap/2023#AccountingStandardsUpdate202006Member
CY2022Q2	amg	Investment And Other Income Loss InvestmentAndOtherIncomeLoss	-22000000.0	usd
CY2023Q2	amg	Investment And Other Income Loss InvestmentAndOtherIncomeLoss	26500000	usd
	amg	Investment And Other Income Loss InvestmentAndOtherIncomeLoss	-8400000	usd
CY2022Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	212000000.0	usd
CY2023Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	220200000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	486400000	usd
CY2022Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	38000000.0	usd
CY2023Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	32800000	usd
CY2022Q2	us-gaap	Profit Loss ProfitLoss	174000000.0	usd
	us-gaap	Net Income Loss NetIncomeLoss	255400000	usd
CY2023Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	35900000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	39200000	shares
CY2022Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	44500000	shares
CY2023Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	42100000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	48100000	shares
CY2022Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.83
CY2023Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.49
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	6.52
CY2022Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.68
CY2023Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.25
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	6.10
CY2022Q2	us-gaap	Profit Loss ProfitLoss	174000000.0	usd
CY2023Q2	us-gaap	Profit Loss ProfitLoss	187400000	usd
	us-gaap	Profit Loss ProfitLoss	392600000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-73400000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	24500000	usd
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-85200000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-600000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	500000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-600000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-600000	usd
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-74000000.0	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	24400000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-85800000	usd
CY2022Q2	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	100000000.0	usd
CY2023Q2	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	211800000	usd
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	306800000	usd
CY2022Q2	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	43100000	usd
CY2023Q2	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	69400000	usd
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	109200000	usd
CY2022Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	56900000	usd
CY2023Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	142400000	usd
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	197600000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	429200000	usd
CY2023Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	785500000	usd
CY2022Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	316000000.0	usd
CY2023Q2	us-gaap	Accounts Receivable Net AccountsReceivableNet	487100000	usd
CY2022Q4	us-gaap	Marketable Securities MarketableSecurities	716900000	usd
CY2023Q2	us-gaap	Marketable Securities MarketableSecurities	444200000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	2648700000	usd
CY2023Q2	us-gaap	Goodwill Goodwill	2659600000	usd
CY2022Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	1876000000	usd
CY2023Q2	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	1863100000	usd
CY2022Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	2139500000	usd
CY2023Q2	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	1943800000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	68500000	usd
CY2023Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	66300000	usd
CY2022Q4	us-gaap	Other Investments OtherInvestments	421600000	usd
CY2023Q2	us-gaap	Other Investments OtherInvestments	457000000.0	usd
CY2022Q4	us-gaap	Other Assets OtherAssets	264600000	usd
CY2023Q2	us-gaap	Other Assets OtherAssets	259500000	usd
CY2022Q4	us-gaap	Assets Assets	8881000000	usd
CY2023Q2	us-gaap	Assets Assets	8966100000	usd
CY2022Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	778300000	usd
CY2023Q2	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	602500000	usd
CY2022Q4	us-gaap	Long Term Debt LongTermDebt	2535300000	usd
CY2023Q2	us-gaap	Long Term Debt LongTermDebt	2536400000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	464700000	usd
CY2023Q2	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	487600000	usd
CY2022Q4	us-gaap	Other Liabilities OtherLiabilities	461700000	usd
CY2023Q2	us-gaap	Other Liabilities OtherLiabilities	470300000	usd
CY2022Q4	us-gaap	Liabilities Liabilities	4240000000	usd
CY2023Q2	us-gaap	Liabilities Liabilities	4096800000	usd
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2023Q2	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	465400000	usd
CY2023Q2	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	500900000	usd
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2023Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2023Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	153000000.0	shares
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	153000000.0	shares
CY2023Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	58500000	shares
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	58500000	shares
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	600000	usd
CY2023Q2	us-gaap	Common Stock Value CommonStockValue	600000	usd
CY2022Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	695500000	usd
CY2023Q2	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	651900000	usd
CY2022Q4	amg	Accumulated Other Comprehensive Income Loss Attributable To Parent Net Of Tax AccumulatedOtherComprehensiveIncomeLossAttributableToParentNetOfTax	-203400000	usd
CY2023Q2	amg	Accumulated Other Comprehensive Income Loss Attributable To Parent Net Of Tax AccumulatedOtherComprehensiveIncomeLossAttributableToParentNetOfTax	-161200000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	5718200000	usd
CY2023Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	5977200000	usd
CY2022Q4	us-gaap	Stockholders Equity Before Treasury Stock StockholdersEquityBeforeTreasuryStock	6210900000	usd
CY2023Q2	us-gaap	Stockholders Equity Before Treasury Stock StockholdersEquityBeforeTreasuryStock	6468500000	usd
CY2022Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	22700000	shares
CY2023Q2	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	23100000	shares
CY2022Q4	us-gaap	Treasury Stock Value TreasuryStockValue	2980600000	usd
CY2023Q2	us-gaap	Treasury Stock Value TreasuryStockValue	3070500000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	3230300000	usd
CY2023Q2	us-gaap	Stockholders Equity StockholdersEquity	3398000000	usd
CY2022Q4	us-gaap	Other Minority Interests OtherMinorityInterests	945300000	usd
CY2023Q2	us-gaap	Other Minority Interests OtherMinorityInterests	970400000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4175600000	usd
CY2023Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4368400000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	8881000000	usd
CY2023Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	8966100000	usd
CY2022Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3593200000	usd
CY2022Q2	us-gaap	Profit Loss ProfitLoss	174000000.0	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-74000000.0	usd
CY2022Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	15100000	usd
CY2022Q2	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	1000000.0	usd
CY2022Q2	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	80000000.0	usd
CY2022Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.01
CY2022Q2	us-gaap	Dividends Dividends	300000	usd
CY2022Q2	amg	Affiliate Equity Compensation Expense Including Adjustmentsand Portion Attributableto Noncontrolling Interest AffiliateEquityCompensationExpenseIncludingAdjustmentsandPortionAttributabletoNoncontrollingInterest	14100000	usd
CY2022Q2	amg	Noncontrolling Interest Increase Decrease From Subsidiary Equity Issuance NoncontrollingInterestIncreaseDecreaseFromSubsidiaryEquityIssuance	1500000	usd
CY2022Q2	amg	Noncontrolling Interest Increase Decreasefrom Purchaseof Interests NoncontrollingInterestIncreaseDecreasefromPurchaseofInterests	0	usd
CY2022Q2	amg	Redeemable Noncontrolling Interest Equity Change In Redemption Value RedeemableNoncontrollingInterestEquityChangeInRedemptionValue	79900000	usd
CY2022Q2	amg	Noncontrolling Interest Decreasefrom Transfersto Noncontrolling Interest Holders NoncontrollingInterestDecreasefromTransferstoNoncontrollingInterestHolders	1800000	usd
CY2022Q2	amg	Noncontrolling Interest Increase Decrease From Contributions From Affiliate And Other NoncontrollingInterestIncreaseDecreaseFromContributionsFromAffiliateAndOther	10400000	usd
CY2022Q2	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	89300000	usd
CY2022Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3643800000	usd
CY2023Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4219400000	usd
CY2023Q2	us-gaap	Profit Loss ProfitLoss	187400000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	24400000	usd
CY2023Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	14700000	usd
CY2023Q2	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-100000	usd
CY2023Q2	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	44900000	usd
CY2023Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.01
CY2023Q2	us-gaap	Dividends Dividends	400000	usd
CY2023Q2	amg	Affiliate Equity Compensation Expense Including Adjustmentsand Portion Attributableto Noncontrolling Interest AffiliateEquityCompensationExpenseIncludingAdjustmentsandPortionAttributabletoNoncontrollingInterest	18200000	usd
CY2023Q2	amg	Noncontrolling Interest Increase Decrease From Subsidiary Equity Issuance NoncontrollingInterestIncreaseDecreaseFromSubsidiaryEquityIssuance	1400000	usd
CY2023Q2	amg	Noncontrolling Interest Increase Decreasefrom Purchaseof Interests NoncontrollingInterestIncreaseDecreasefromPurchaseofInterests	5000000.0	usd
CY2023Q2	amg	Redeemable Noncontrolling Interest Equity Change In Redemption Value RedeemableNoncontrollingInterestEquityChangeInRedemptionValue	4500000	usd
	amg	Purchasesof Securitiesby Affiliate Sponsored Consolidated Products PurchasesofSecuritiesbyAffiliateSponsoredConsolidatedProducts	21400000	usd
CY2023Q2	amg	Noncontrolling Interest Decreasefrom Transfersto Noncontrolling Interest Holders NoncontrollingInterestDecreasefromTransferstoNoncontrollingInterestHolders	100000	usd
CY2023Q2	amg	Noncontrolling Interest Increase Decrease From Contributions From Affiliate And Other NoncontrollingInterestIncreaseDecreaseFromContributionsFromAffiliateAndOther	15800000	usd
CY2023Q2	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	76900000	usd
CY2023Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4368400000	usd
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3710600000	usd
	us-gaap	Profit Loss ProfitLoss	392600000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-85800000	usd
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	29800000	usd
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-12300000	usd
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	44900000	usd
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.02
	us-gaap	Dividends Dividends	800000	usd
	amg	Affiliate Equity Compensation Expense Including Adjustmentsand Portion Attributableto Noncontrolling Interest AffiliateEquityCompensationExpenseIncludingAdjustmentsandPortionAttributabletoNoncontrollingInterest	28600000	usd
	amg	Noncontrolling Interest Increase Decrease From Subsidiary Equity Issuance NoncontrollingInterestIncreaseDecreaseFromSubsidiaryEquityIssuance	14700000	usd
	amg	Noncontrolling Interest Increase Decreasefrom Purchaseof Interests NoncontrollingInterestIncreaseDecreasefromPurchaseofInterests	4500000	usd
	amg	Redeemable Noncontrolling Interest Equity Change In Redemption Value RedeemableNoncontrollingInterestEquityChangeInRedemptionValue	-97200000	usd
	amg	Noncontrolling Interest Decreasefrom Transfersto Noncontrolling Interest Holders NoncontrollingInterestDecreasefromTransferstoNoncontrollingInterestHolders	100000	usd
	amg	Noncontrolling Interest Increase Decrease From Contributions From Affiliate And Other NoncontrollingInterestIncreaseDecreaseFromContributionsFromAffiliateAndOther	12500000	usd
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	156400000	usd
CY2023Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4368400000	usd
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	350900000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	57400000	usd
	us-gaap	Gain Loss On Investments GainLossOnInvestments	48200000	usd
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	100000	usd
	amg	Saleof Securitiesby Affiliate Sponsored Consolidated Products SaleofSecuritiesbyAffiliateSponsoredConsolidatedProducts	24600000	usd
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	163800000	usd
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-10000000.0	usd
	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	-201500000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	325500000	usd
	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	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	6100000	usd
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	4000000.0	usd
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	35300000	usd
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	215000000.0	usd
	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	16400000	usd
	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	510100000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-172000000.0	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	291100000	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	58000000.0	usd
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	25000000.0	usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	279900000	usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	44300000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	800000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	800000	usd
	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	211800000	usd
	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	156400000	usd
	amg	Proceeds From Payments For Affiliate Equity Issuances And Repurchases ProceedsFromPaymentsForAffiliateEquityIssuancesAndRepurchases	-19100000	usd
	amg	Proceeds From Payments For Affiliate Equity Issuances And Repurchases ProceedsFromPaymentsForAffiliateEquityIssuancesAndRepurchases	-8400000	usd
	amg	Subscriptions To Consolidated Affiliate Sponsored Investment Products Net Of Redemptions SubscriptionsToConsolidatedAffiliateSponsoredInvestmentProductsNetOfRedemptions	6900000	usd
	amg	Subscriptions To Consolidated Affiliate Sponsored Investment Products Net Of Redemptions SubscriptionsToConsolidatedAffiliateSponsoredInvestmentProductsNetOfRedemptions	-5300000	usd
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-53500000	usd
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-50000000.0	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-616200000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-265200000	usd
	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-20000000.0	usd
	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6100000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-301700000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	357500000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	908500000	usd
CY2022Q2	amg	Reduction To Cash Due To Deconsolidation Of Affiliate Sponsored Investment Products ReductionToCashDueToDeconsolidationOfAffiliateSponsoredInvestmentProducts	0	usd
CY2023Q2	amg	Reduction To Cash Due To Deconsolidation Of Affiliate Sponsored Investment Products ReductionToCashDueToDeconsolidationOfAffiliateSponsoredInvestmentProducts	1200000	usd
CY2023Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	785500000	usd
CY2023Q2	amg	Debt Securities Available For Sale Maturity Year One DebtSecuritiesAvailableForSaleMaturityYearOne	176500000	usd
CY2023Q2	amg	Debt Securities Available For Sale Maturity Year Two DebtSecuritiesAvailableForSaleMaturityYearTwo	152600000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	252300000	usd
CY2023Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	330800000	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
CY2023Q2	us-gaap	Equity Securities Fv Ni Cost EquitySecuritiesFvNiCost	80100000	usd
CY2022	us-gaap	Equity Securities Fv Ni Unrealized Gain EquitySecuritiesFvNiUnrealizedGain	59900000	usd
	us-gaap	Equity Securities Fv Ni Unrealized Gain EquitySecuritiesFvNiUnrealizedGain	17000000.0	usd
CY2022	us-gaap	Equity Securities Fv Ni Unrealized Loss EquitySecuritiesFvNiUnrealizedLoss	6400000	usd
	us-gaap	Equity Securities Fv Ni Unrealized Loss EquitySecuritiesFvNiUnrealizedLoss	1300000	usd
CY2022Q4	us-gaap	Equity Securities Fv Ni Current And Noncurrent EquitySecuritiesFvNiCurrentAndNoncurrent	447900000	usd
CY2023Q2	us-gaap	Equity Securities Fv Ni Current And Noncurrent EquitySecuritiesFvNiCurrentAndNoncurrent	95800000	usd
CY2022Q4	us-gaap	Trading Securities Debt Amortized Cost TradingSecuritiesDebtAmortizedCost	19700000	usd
CY2023Q2	us-gaap	Trading Securities Debt Amortized Cost TradingSecuritiesDebtAmortizedCost	20300000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1300000	usd
CY2023Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1700000	usd
CY2022Q4	amg	Debt Securities Trading Accumulated Gross Unrealized Loss Before Tax DebtSecuritiesTradingAccumulatedGrossUnrealizedLossBeforeTax	1700000	usd
CY2023Q2	amg	Debt Securities Trading Accumulated Gross Unrealized Loss Before Tax DebtSecuritiesTradingAccumulatedGrossUnrealizedLossBeforeTax	1000000.0	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	251000000.0	usd
CY2023Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	329100000	usd
CY2022Q4	us-gaap	Trading Securities Debt TradingSecuritiesDebt	18000000.0	usd
CY2023Q2	us-gaap	Trading Securities Debt TradingSecuritiesDebt	19300000	usd
CY2022Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	50400000	usd
CY2022Q1	us-gaap	Other Investments OtherInvestments	394100000	usd
CY2023Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	50400000	usd
CY2023Q1	us-gaap	Other Investments OtherInvestments	426000000.0	usd
CY2022Q2	amg	Equity Securities Without Readily Determinable Fair Value Purchases And Commitments EquitySecuritiesWithoutReadilyDeterminableFairValuePurchasesAndCommitments	0	usd
CY2022Q2	amg	Other Investments Purchases OtherInvestmentsPurchases	12100000	usd
CY2023Q2	amg	Equity Securities Without Readily Determinable Fair Value Purchases And Commitments EquitySecuritiesWithoutReadilyDeterminableFairValuePurchasesAndCommitments	0	usd
CY2023Q2	amg	Other Investments Purchases OtherInvestmentsPurchases	36200000	usd
CY2022Q2	amg	Equity Securities Without Readily Determinable Fair Value Sales And Distributions EquitySecuritiesWithoutReadilyDeterminableFairValueSalesAndDistributions	0	usd
CY2022Q2	amg	Other Investments Sales OtherInvestmentsSales	7800000	usd
CY2023Q2	amg	Equity Securities Without Readily Determinable Fair Value Sales And Distributions EquitySecuritiesWithoutReadilyDeterminableFairValueSalesAndDistributions	0	usd
CY2023Q2	amg	Other Investments Sales OtherInvestmentsSales	17400000	usd
CY2022Q2	amg	Equity Securities Without Readily Determinable Fair Value Net Gain Loss EquitySecuritiesWithoutReadilyDeterminableFairValueNetGainLoss	0	usd
CY2022Q2	amg	Other Investments Gain Loss Net OtherInvestmentsGainLossNet	-13700000	usd
CY2023Q2	amg	Equity Securities Without Readily Determinable Fair Value Net Gain Loss EquitySecuritiesWithoutReadilyDeterminableFairValueNetGainLoss	0	usd
CY2023Q2	amg	Other Investments Gain Loss Net OtherInvestmentsGainLossNet	12200000	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
CY2021Q4	us-gaap	Other Investments OtherInvestments	375200000	usd
	amg	Equity Securities Without Readily Determinable Fair Value Purchases And Commitments EquitySecuritiesWithoutReadilyDeterminableFairValuePurchasesAndCommitments	0	usd
	amg	Other Investments Purchases OtherInvestmentsPurchases	27100000	usd
	amg	Equity Securities Without Readily Determinable Fair Value Purchases And Commitments EquitySecuritiesWithoutReadilyDeterminableFairValuePurchasesAndCommitments	0	usd
	amg	Other Investments Purchases OtherInvestmentsPurchases	46000000.0	usd
	amg	Equity Securities Without Readily Determinable Fair Value Sales And Distributions EquitySecuritiesWithoutReadilyDeterminableFairValueSalesAndDistributions	0	usd
	amg	Other Investments Sales OtherInvestmentsSales	19300000	usd
	amg	Equity Securities Without Readily Determinable Fair Value Sales And Distributions EquitySecuritiesWithoutReadilyDeterminableFairValueSalesAndDistributions	0	usd
	amg	Other Investments Sales OtherInvestmentsSales	28900000	usd
	amg	Equity Securities Without Readily Determinable Fair Value Net Gain Loss EquitySecuritiesWithoutReadilyDeterminableFairValueNetGainLoss	0	usd
	amg	Other Investments Gain Loss Net OtherInvestmentsGainLossNet	1700000	usd
	amg	Equity Securities Without Readily Determinable Fair Value Net Gain Loss EquitySecuritiesWithoutReadilyDeterminableFairValueNetGainLoss	0	usd
	amg	Other Investments Gain Loss Net OtherInvestmentsGainLossNet	18300000	usd
CY2022Q2	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	50400000	usd
CY2022Q2	us-gaap	Other Investments OtherInvestments	384700000	usd
CY2022Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	2139500000	usd
CY2023Q2	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	1943800000	usd
CY2022Q4	us-gaap	Equity Method Investments EquityMethodInvestments	87900000	usd
CY2023Q2	us-gaap	Equity Method Investments EquityMethodInvestments	97000000	usd
CY2022Q4	us-gaap	Long Term Debt LongTermDebt	2535300000	usd
CY2023Q2	us-gaap	Long Term Debt LongTermDebt	2536400000	usd
CY2023Q2	amg	Investment Commitment Amount InvestmentCommitmentAmount	154300000	usd
CY2023Q2	amg	Deferred Payment Obligations Liability DeferredPaymentObligationsLiability	65000000.0	usd
CY2023Q2	amg	Deferred Payment Obligations Liability To Be Paid Year One DeferredPaymentObligationsLiabilityToBePaidYearOne	21700000	usd
CY2023Q2	amg	Deferred Payment Obligations Liability To Be Paid Year Two DeferredPaymentObligationsLiabilityToBePaidYearTwo	43300000	usd
CY2023Q2	amg	Deferred Payment Obligations Liability To Be Paid Year Three DeferredPaymentObligationsLiabilityToBePaidYearThree	0	usd
CY2023Q2	amg	Contingent Consideration Liability ContingentConsiderationLiability	23400000	usd
CY2023Q2	amg	Contingent Consideration Liability To Be Paid Year One ContingentConsiderationLiabilityToBePaidYearOne	0	usd
CY2023Q2	amg	Contingent Consideration Liability To Be Paid Year Two ContingentConsiderationLiabilityToBePaidYearTwo	21800000	usd
CY2023Q2	amg	Contingent Consideration Liability To Be Paid Year Three ContingentConsiderationLiabilityToBePaidYearThree	1600000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	2648700000	usd
	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	16000000.0	usd
	us-gaap	Goodwill Other Increase Decrease GoodwillOtherIncreaseDecrease	-5100000	usd
CY2023Q2	us-gaap	Goodwill Goodwill	2659600000	usd
CY2022Q4	amg	Number Of Affiliates Equity Method Investment NumberOfAffiliatesEquityMethodInvestment	20	affiliate
CY2023Q2	amg	Number Of Affiliates Equity Method Investment NumberOfAffiliatesEquityMethodInvestment	20	affiliate
CY2023Q2	amg	Common Stock Voting Rights Percent CommonStockVotingRightsPercent	0.05
CY2022Q2	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	15100000	usd
CY2023Q2	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	14700000	usd
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	29800000	usd
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	29400000	usd
CY2022Q2	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1900000	usd
CY2023Q2	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	3700000	usd
	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	3700000	usd
CY2022Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	64700000	usd
CY2023Q2	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	82700000	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 Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	127.77
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	0	shares
	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	0
	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
CY2023Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	3200000	shares
CY2023Q2	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	P3Y2M12D
CY2023Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	0.0	shares
CY2023Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	121.51
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P3Y2M12D
	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 Increasedecrease Attributableto Consolidated Partnerships NoncontrollingInterestIncreasedecreaseAttributabletoConsolidatedPartnerships	-4100000	usd
	amg	Noncontrolling Interest Decreasefrom Transfersto Other Liabilities NoncontrollingInterestDecreasefromTransferstoOtherLiabilities	-57700000	usd
	amg	Noncontrolling Interest Increase From Transfers To Noncontrolling Interest Holders NoncontrollingInterestIncreaseFromTransfersToNoncontrollingInterestHolders	100000	usd
	amg	Redeemable Noncontrolling Interest Equity Change In Redemption Value RedeemableNoncontrollingInterestEquityChangeInRedemptionValue	-97200000	usd
CY2023Q2	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	500900000	usd
	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	211800000	usd
	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	156400000	usd
	us-gaap	Payments To Acquire Businesses And Interest In Affiliates PaymentsToAcquireBusinessesAndInterestInAffiliates	32200000	usd
	us-gaap	Payments To Acquire Businesses And Interest In Affiliates PaymentsToAcquireBusinessesAndInterestInAffiliates	21800000	usd
	us-gaap	Proceeds From Divestiture Of Businesses And Interests In Affiliates ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates	13100000	usd
	us-gaap	Proceeds From Divestiture Of Businesses And Interests In Affiliates ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates	13400000	usd
CY2022Q2	amg	Affiliate Equity Compensation Expense Including Portion Attributableto Noncontrolling Interest AffiliateEquityCompensationExpenseIncludingPortionAttributabletoNoncontrollingInterest	10700000	usd
CY2023Q2	amg	Affiliate Equity Compensation Expense Including Portion Attributableto Noncontrolling Interest AffiliateEquityCompensationExpenseIncludingPortionAttributabletoNoncontrollingInterest	17400000	usd
	amg	Affiliate Equity Compensation Expense Including Portion Attributableto Noncontrolling Interest AffiliateEquityCompensationExpenseIncludingPortionAttributabletoNoncontrollingInterest	26900000	usd
	amg	Affiliate Equity Compensation Expense Including Portion Attributableto Noncontrolling Interest AffiliateEquityCompensationExpenseIncludingPortionAttributabletoNoncontrollingInterest	28000000.0	usd
CY2022Q2	us-gaap	Net Income Loss NetIncomeLoss	109400000	usd
CY2023Q2	us-gaap	Net Income Loss NetIncomeLoss	125300000	usd
	us-gaap	Net Income Loss NetIncomeLoss	255400000	usd
	us-gaap	Net Income Loss NetIncomeLoss	259800000	usd
CY2022Q2	amg	Adjustments To Additional Paid In Capital Increase Decrease In Carrying Amount Of Redeemable Noncontrolling Interests AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterests	-1500000	usd
CY2023Q2	amg	Adjustments To Additional Paid In Capital Increase Decrease In Carrying Amount Of Redeemable Noncontrolling Interests AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterests	5000000.0	usd
	amg	Adjustments To Additional Paid In Capital Increase Decrease In Carrying Amount Of Redeemable Noncontrolling Interests AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterests	-4900000	usd
	amg	Adjustments To Additional Paid In Capital Increase Decrease In Carrying Amount Of Redeemable Noncontrolling Interests AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterests	8600000	usd
CY2022Q2	amg	Adjustmentsto Additional Paidin Capital Decreasein Carrying Amountof Redeemable Noncontrolling Interests AdjustmentstoAdditionalPaidinCapitalDecreaseinCarryingAmountofRedeemableNoncontrollingInterests	4000000.0	usd
CY2023Q2	amg	Adjustmentsto Additional Paidin Capital Decreasein Carrying Amountof Redeemable Noncontrolling Interests AdjustmentstoAdditionalPaidinCapitalDecreaseinCarryingAmountofRedeemableNoncontrollingInterests	10500000	usd
	amg	Adjustmentsto Additional Paidin Capital Decreasein Carrying Amountof Redeemable Noncontrolling Interests AdjustmentstoAdditionalPaidinCapitalDecreaseinCarryingAmountofRedeemableNoncontrollingInterests	29900000	usd
	amg	Adjustmentsto Additional Paidin Capital Decreasein Carrying Amountof Redeemable Noncontrolling Interests AdjustmentstoAdditionalPaidinCapitalDecreaseinCarryingAmountofRedeemableNoncontrollingInterests	38000000.0	usd
CY2022Q2	amg	Increase Decrease In Equity Due To Profit Loss And Net Transfers With Noncontrolling Interests IncreaseDecreaseInEquityDueToProfitLossAndNetTransfersWithNoncontrollingInterests	106900000	usd
CY2023Q2	amg	Increase Decrease In Equity Due To Profit Loss And Net Transfers With Noncontrolling Interests IncreaseDecreaseInEquityDueToProfitLossAndNetTransfersWithNoncontrollingInterests	109800000	usd
	amg	Increase Decrease In Equity Due To Profit Loss And Net Transfers With Noncontrolling Interests IncreaseDecreaseInEquityDueToProfitLossAndNetTransfersWithNoncontrollingInterests	230400000	usd
	amg	Increase Decrease In Equity Due To Profit Loss And Net Transfers With Noncontrolling Interests IncreaseDecreaseInEquityDueToProfitLossAndNetTransfersWithNoncontrollingInterests	213200000	usd
CY2022Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	38000000.0	usd
CY2023Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	32800000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	93800000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	77700000	usd
CY2022Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	109400000	usd
CY2023Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	125300000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	255400000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	259800000	usd
CY2022Q2	amg	Net Income Loss Other Noncontrolling Interests Redeemable NetIncomeLossOtherNoncontrollingInterestsRedeemable	6600000	usd
CY2023Q2	amg	Net Income Loss Other Noncontrolling Interests Redeemable NetIncomeLossOtherNoncontrollingInterestsRedeemable	8200000	usd
	amg	Net Income Loss Other Noncontrolling Interests Redeemable NetIncomeLossOtherNoncontrollingInterestsRedeemable	30800000	usd
	amg	Net Income Loss Other Noncontrolling Interests Redeemable NetIncomeLossOtherNoncontrollingInterestsRedeemable	4500000	usd
CY2022Q2	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	3500000	usd
CY2023Q2	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	3400000	usd
	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	7300000	usd
	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	6700000	usd
CY2022Q2	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	119500000	usd
CY2023Q2	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	136900000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	293500000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	271000000.0	usd
CY2022Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	38700000	shares
CY2023Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	35900000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	39200000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	35900000	shares
CY2022Q2	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1200000	shares
CY2023Q2	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	1300000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1800000	shares
CY2022Q2	amg	Settlement Of Redeemable Non Controlling Interests Shares Issued SettlementOfRedeemableNonControllingInterestsSharesIssued	2800000	shares
CY2023Q2	amg	Settlement Of Redeemable Non Controlling Interests Shares Issued SettlementOfRedeemableNonControllingInterestsSharesIssued	2800000	shares
	amg	Settlement Of Redeemable Non Controlling Interests Shares Issued SettlementOfRedeemableNonControllingInterestsSharesIssued	5700000	shares
	amg	Settlement Of Redeemable Non Controlling Interests Shares Issued SettlementOfRedeemableNonControllingInterestsSharesIssued	800000	shares
CY2022Q2	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	1800000	shares
CY2023Q2	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
CY2022Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	44500000	shares
CY2023Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	42100000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	48100000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	40200000	shares
	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	700000	shares
CY2023Q2	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	700000	shares
CY2023Q2	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	125.13
	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	125.13
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
CY2022Q2	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-72400000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	1600000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-74000000.0	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	25400000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	1000000.0	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	24400000	usd
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-83700000	usd
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	2100000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-85800000	usd
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	55600000	usd
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	3800000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	51800000	usd
	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	51900000	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	51800000	usd

Files In Submission

Name	View Source	Status
0001004434-23-000025-index-headers.html	Edgar Link	pending
0001004434-23-000025-index.html	Edgar Link	pending
0001004434-23-000025.txt	Edgar Link	pending
0001004434-23-000025-xbrl.zip	Edgar Link	pending
amg-20230630.htm	Edgar Link	pending
amg-20230630.xsd	Edgar Link	pending
amg-20230630_g1.jpg	Edgar Link	pending
amg-20230630_g2.jpg	Edgar Link	pending
amg_06302023xexhibit311.htm	Edgar Link	pending
amg_06302023xexhibit312.htm	Edgar Link	pending
amg_06302023xexhibit321.htm	Edgar Link	pending
amg_06302023xexhibit322.htm	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
amg-20230630_cal.xml	Edgar Link	unprocessable
amg-20230630_def.xml	Edgar Link	unprocessable
amg-20230630_lab.xml	Edgar Link	unprocessable
FilingSummary.xml	Edgar Link	unprocessable
amg-20230630_pre.xml	Edgar Link	unprocessable
amg-20230630_htm.xml	Edgar Link	completed
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$AMG
AFFILIATED MANAGERS GROUP, INC. Stock $amg

2023 Q3 Form 10-Q Financial Statement

#000100443423000025 Filed on August 07, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMG AFFILIATED MANAGERS GROUP, INC. Stock $amg

2023 Q3 Form 10-Q Financial Statement

#000100443423000025 Filed on August 07, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMG
AFFILIATED MANAGERS GROUP, INC. Stock $amg