$AMG
AFFILIATED MANAGERS GROUP, INC. Stock $amg

$amg Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-K Financial Statement

#000100443422000017 Filed on February 18, 2022

Income Statement

Concept	2021 Q4	2021	2020 Q4
Revenue	$691.8M	$2.412B	$554.3M
YoY Change	24.81%	18.98%	-0.22%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin	$391.7M	$347.1M	$330.3M
YoY Change	18.59%	8.0%	0.61%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$14.50M	$52.30M	$11.50M
YoY Change	26.09%	-67.23%	-85.08%
% of Gross Profit
Operating Expenses	$439.1M	$1.631B	$360.0M
YoY Change	21.97%	8.05%	-15.53%
Operating Profit
YoY Change
Interest Expense	$115.3M	$111.4M	$39.90M
YoY Change	188.97%	20.69%	-213.68%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$368.0M	$1.141B	$234.2M
YoY Change	57.13%	124.45%	148.36%
Income Tax	$84.60M	$251.0M	$38.40M
% Of Pretax Income	22.99%	22.0%	16.4%
Net Earnings	$178.4M	$565.7M	$115.9M
YoY Change	53.93%	179.77%	415.11%
Net Earnings / Revenue	25.79%	23.45%	20.91%
Basic Earnings Per Share		$13.65
Diluted Earnings Per Share	$3.982M	$13.05	$2.564M
COMMON SHARES
Basic Shares Outstanding	40.65M shares	41.50M shares	45.36M shares
Diluted Shares Outstanding		44.80M shares

Balance Sheet

Concept	2021 Q4	2021	2020 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$987.0M	$908.5M	$1.115B
YoY Change	-11.45%	-12.62%	86.08%
Cash & Equivalents	$908.5M	$908.5M	$1.040B
Short-Term Investments	$78.50M		$74.90M
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables	$419.2M	$419.2M	$421.6M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$1.328B	$1.328B	$1.461B
YoY Change	-9.14%	-9.14%	52.74%
LONG-TERM ASSETS
Property, Plant & Equipment	$73.90M	$73.90M	$79.60M
YoY Change	-7.16%	-7.16%	-13.76%
Goodwill	$2.689B		$2.661B
YoY Change	1.04%		0.37%
Intangibles	$1.966B		$1.049B
YoY Change	87.49%		-11.27%
Long-Term Investments	$111.4M	$2.588B	$112.7M
YoY Change	-1.15%	7.53%	-68.04%
Other Assets
YoY Change
Total Long-Term Assets	$7.549B	$7.549B	$6.428B
YoY Change	17.44%	17.44%	-4.02%
TOTAL ASSETS
Total Short-Term Assets	$1.328B	$1.328B	$1.461B
Total Long-Term Assets	$7.549B	$7.549B	$6.428B
Total Assets	$8.876B	$8.876B	$7.889B
YoY Change	12.52%	12.52%	3.08%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$789.1M	$789.1M	$712.4M
YoY Change	10.77%	10.77%	12.26%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$789.1M	$789.1M	$712.4M
YoY Change	10.77%	10.77%	12.26%
LONG-TERM LIABILITIES
Long-Term Debt	$2.490B	$2.490B	$2.312B
YoY Change	7.71%	7.71%	28.89%
Other Long-Term Liabilities	$709.2M	$709.2M	$452.2M
YoY Change	56.83%	56.83%	25.93%
Total Long-Term Liabilities	$3.200B	$3.200B	$2.764B
YoY Change	15.75%	15.75%	28.4%
TOTAL LIABILITIES
Total Short-Term Liabilities	$789.1M	$789.1M	$712.4M
Total Long-Term Liabilities	$3.200B	$3.200B	$2.764B
Total Liabilities	$4.492B	$6.090B	$3.900B
YoY Change	15.17%	19.2%	20.46%
SHAREHOLDERS EQUITY
Retained Earnings	$4.570B		$4.006B
YoY Change	14.08%		4.86%
Common Stock	$652.2M		$729.5M
YoY Change	-10.6%		3.07%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$2.347B		$1.857B
YoY Change	26.41%		25.36%
Treasury Stock Shares	18.30M shares		14.50M shares
Shareholders Equity	$2.786B	$2.786B	$2.780B
YoY Change
Total Liabilities & Shareholders Equity	$8.876B	$8.876B	$7.889B
YoY Change	12.52%	12.52%	3.08%

Cashflow Statement

Concept	2021 Q4	2021	2020 Q4
OPERATING ACTIVITIES
Net Income	$178.4M	$565.7M	$115.9M
YoY Change	53.93%	179.77%	415.11%
Depreciation, Depletion And Amortization	$14.50M	$52.30M	$11.50M
YoY Change	26.09%	-67.23%	-85.08%
Cash From Operating Activities	$358.2M	$1.259B	$382.5M
YoY Change	-6.35%	24.76%	23.19%
INVESTING ACTIVITIES
Capital Expenditures	-$3.500M	$8.400M	-$1.700M
YoY Change	105.88%	-1.18%	-46.87%
Acquisitions
YoY Change
Other Investing Activities	-$402.4M	-$575.3M	-$44.00M
YoY Change	814.55%	1172.79%	-137.07%
Cash From Investing Activities	-$405.9M	-$583.7M	-$45.70M
YoY Change	788.18%	986.96%	-139.57%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$595.3M
YoY Change		77.65%
Debt Paid & Issued, Net		$33.00M
YoY Change		-90.57%
Cash From Financing Activities	-172.8M	-$798.3M	-233.9M
YoY Change	-26.12%	75.3%	-22.16%
NET CHANGE
Cash From Operating Activities	358.2M	$1.259B	382.5M
Cash From Investing Activities	-405.9M	-$583.7M	-45.70M
Cash From Financing Activities	-172.8M	-$798.3M	-233.9M
Net Change In Cash	-220.5M	-$123.6M	102.9M
YoY Change	-314.29%	-124.61%	-18.01%
FREE CASH FLOW
Cash From Operating Activities	$358.2M	$1.259B	$382.5M
Capital Expenditures	-$3.500M	$8.400M	-$1.700M
Free Cash Flow	$361.7M	$1.251B	$384.2M
YoY Change	-5.86%	24.98%	22.47%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0001004434
CY2021	dei	Amendment Flag AmendmentFlag	false
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CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-12-31
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	001-13459
CY2021	dei	Entity Registrant Name EntityRegistrantName	AFFILIATED MANAGERS GROUP, INC.
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	04-3218510
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	777 South Flagler Drive
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	West Palm Beach
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	FL
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	33401
CY2021	dei	City Area Code CityAreaCode	800
CY2021	dei	Local Phone Number LocalPhoneNumber	345-1100
CY2021	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2021	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2021	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2021	dei	Entity Small Business EntitySmallBusiness	false
CY2021	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
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CY2019	us-gaap	Profit Loss ProfitLoss	305100000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	12600000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	49900000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-5400000	USD
CY2019	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	360800000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.28
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	66100000	USD
CY2019	amg	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs And Other AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCostsAndOther	100000	USD
CY2019	amg	Affiliate Equity Compensation Expense Including Adjustmentsand Portion Attributableto Noncontrolling Interest AffiliateEquityCompensationExpenseIncludingAdjustmentsandPortionAttributabletoNoncontrollingInterest	40500000	USD
CY2019	amg	Noncontrolling Interest Increase Decrease From Subsidiary Equity Issuance NoncontrollingInterestIncreaseDecreaseFromSubsidiaryEquityIssuance	11200000	USD
CY2019	amg	Noncontrolling Interest Increase Decreasefrom Purchaseof Interests NoncontrollingInterestIncreaseDecreasefromPurchaseofInterests	2900000	USD
CY2019	amg	Redeemable Noncontrolling Interest Equity Change In Redemption Value RedeemableNoncontrollingInterestEquityChangeInRedemptionValue	-166000000.0	USD
CY2019	amg	Noncontrolling Interest Decreasefrom Transfersto Noncontrolling Interest Holders NoncontrollingInterestDecreasefromTransferstoNoncontrollingInterestHolders	105000000.0	USD
CY2019	amg	Noncontrolling Interest Increase Decrease From Contributions From Affiliate And Other NoncontrollingInterestIncreaseDecreaseFromContributionsFromAffiliateAndOther	-300000	USD
CY2019	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	347900000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3499100000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	427000000.0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	13700000	USD
CY2020	amg	Redeemable Noncontrolling Interest Equity Change In Redemption Value RedeemableNoncontrollingInterestEquityChangeInRedemptionValue	-59400000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	67400000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-6500000	USD
CY2020	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	430000000.0	USD
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.35
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	16500000	USD
CY2020	amg	Affiliate Equity Compensation Expense Including Adjustmentsand Portion Attributableto Noncontrolling Interest AffiliateEquityCompensationExpenseIncludingAdjustmentsandPortionAttributabletoNoncontrollingInterest	51800000	USD
CY2020	amg	Noncontrolling Interest Increase Decrease From Subsidiary Equity Issuance NoncontrollingInterestIncreaseDecreaseFromSubsidiaryEquityIssuance	20100000	USD
CY2020	amg	Noncontrolling Interest Increase Decreasefrom Purchaseof Interests NoncontrollingInterestIncreaseDecreasefromPurchaseofInterests	44200000	USD
CY2020	amg	Noncontrolling Interest Decreasefrom Transfersto Noncontrolling Interest Holders NoncontrollingInterestDecreasefromTransferstoNoncontrollingInterestHolders	-7800000	USD
CY2020	amg	Noncontrolling Interest Increase Decrease From Contributions From Affiliate And Other NoncontrollingInterestIncreaseDecreaseFromContributionsFromAffiliateAndOther	4900000	USD
CY2020	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	306300000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3317300000	USD
CY2021	us-gaap	Profit Loss ProfitLoss	890100000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	7200000	USD
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	63400000	USD
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-16700000	USD
CY2021	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt	-7100000	USD
CY2021	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	509900000	USD
CY2021	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.04
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1700000	USD
CY2021	amg	Noncontrolling Interest Increase From Investments In Affiliates NoncontrollingInterestIncreaseFromInvestmentsInAffiliates	247000000.0	USD
CY2021	amg	Affiliate Equity Compensation Expense Including Adjustmentsand Portion Attributableto Noncontrolling Interest AffiliateEquityCompensationExpenseIncludingAdjustmentsandPortionAttributabletoNoncontrollingInterest	62900000	USD
CY2021	amg	Noncontrolling Interest Increase Decrease From Subsidiary Equity Issuance NoncontrollingInterestIncreaseDecreaseFromSubsidiaryEquityIssuance	103900000	USD
CY2021	amg	Noncontrolling Interest Increase Decreasefrom Purchaseof Interests NoncontrollingInterestIncreaseDecreasefromPurchaseofInterests	2800000	USD
CY2021	amg	Redeemable Noncontrolling Interest Equity Change In Redemption Value RedeemableNoncontrollingInterestEquityChangeInRedemptionValue	-121600000	USD
CY2021	amg	Noncontrolling Interest Decreasefrom Transfersto Noncontrolling Interest Holders NoncontrollingInterestDecreasefromTransferstoNoncontrollingInterestHolders	3900000	USD
CY2021	amg	Noncontrolling Interest Increase Decrease From Contributions From Affiliate And Other NoncontrollingInterestIncreaseDecreaseFromContributionsFromAffiliateAndOther	11200000	USD
CY2021	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	334300000	USD
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3710600000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	305100000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	427000000.0	USD
CY2021	us-gaap	Profit Loss ProfitLoss	890100000	USD
CY2019	amg	Amortizationand Impairmentsof Intangible Assets AmortizationandImpairmentsofIntangibleAssets	144500000	USD
CY2020	amg	Amortizationand Impairmentsof Intangible Assets AmortizationandImpairmentsofIntangibleAssets	140500000	USD
CY2021	amg	Amortizationand Impairmentsof Intangible Assets AmortizationandImpairmentsofIntangibleAssets	35700000	USD
CY2019	amg	Depreciation And Other Amortization DepreciationAndOtherAmortization	21300000	USD
CY2020	amg	Depreciation And Other Amortization DepreciationAndOtherAmortization	19100000	USD
CY2021	amg	Depreciation And Other Amortization DepreciationAndOtherAmortization	16600000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-55800000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	26800000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	91200000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-338000000.0	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-43400000	USD
CY2021	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	242500000	USD
CY2019	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	252400000	USD
CY2020	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	236800000	USD
CY2021	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	337500000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	90400000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	119200000	USD
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	126700000	USD
CY2019	amg	Realized And Unrealized Investment Gains Losses RealizedAndUnrealizedInvestmentGainsLosses	21400000	USD
CY2020	amg	Realized And Unrealized Investment Gains Losses RealizedAndUnrealizedInvestmentGainsLosses	19500000	USD
CY2021	amg	Realized And Unrealized Investment Gains Losses RealizedAndUnrealizedInvestmentGainsLosses	108700000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-3700000	USD
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-16500000	USD
CY2021	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-44200000	USD
CY2019	amg	Purchasesof Securitiesby Affiliate Sponsored Consolidated Products PurchasesofSecuritiesbyAffiliateSponsoredConsolidatedProducts	42300000	USD
CY2020	amg	Purchasesof Securitiesby Affiliate Sponsored Consolidated Products PurchasesofSecuritiesbyAffiliateSponsoredConsolidatedProducts	110100000	USD
CY2021	amg	Purchasesof Securitiesby Affiliate Sponsored Consolidated Products PurchasesofSecuritiesbyAffiliateSponsoredConsolidatedProducts	109600000	USD
CY2019	amg	Saleof Securitiesby Affiliate Sponsored Consolidated Products SaleofSecuritiesbyAffiliateSponsoredConsolidatedProducts	16500000	USD
CY2020	amg	Saleof Securitiesby Affiliate Sponsored Consolidated Products SaleofSecuritiesbyAffiliateSponsoredConsolidatedProducts	99600000	USD
CY2021	amg	Saleof Securitiesby Affiliate Sponsored Consolidated Products SaleofSecuritiesbyAffiliateSponsoredConsolidatedProducts	58000000.0	USD
CY2019	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	15800000	USD
CY2020	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-1100000	USD
CY2021	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-31700000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	51400000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-73100000	USD
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-23800000	USD
CY2019	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	-56100000	USD
CY2020	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	-64200000	USD
CY2021	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	64500000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	929100000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1009300000	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1259200000	USD
CY2019	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	162300000	USD
CY2020	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	44500000	USD
CY2021	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	562600000	USD
CY2019	amg	Proceeds From Divestiture Of Interest In Subsidiaries And Affiliates And Proceeds From Equity Method Investment Return Of Capital ProceedsFromDivestitureOfInterestInSubsidiariesAndAffiliatesAndProceedsFromEquityMethodInvestmentReturnOfCapital	117700000	USD
CY2020	amg	Proceeds From Divestiture Of Interest In Subsidiaries And Affiliates And Proceeds From Equity Method Investment Return Of Capital ProceedsFromDivestitureOfInterestInSubsidiariesAndAffiliatesAndProceedsFromEquityMethodInvestmentReturnOfCapital	0	USD
CY2021	amg	Proceeds From Divestiture Of Interest In Subsidiaries And Affiliates And Proceeds From Equity Method Investment Return Of Capital ProceedsFromDivestitureOfInterestInSubsidiariesAndAffiliatesAndProceedsFromEquityMethodInvestmentReturnOfCapital	4400000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	9600000	USD
CY2020	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	47700000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	8500000	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	8400000	USD
CY2019	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	43100000	USD
CY2021	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	73500000	USD
CY2019	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	72900000	USD
CY2020	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	47000000.0	USD
CY2021	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	56400000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-24400000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-53700000	USD
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-583700000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	470700000	USD
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	874800000	USD
CY2021	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	200000000.0	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	510000000.0	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	350000000.0	USD
CY2021	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	33000000.0	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	356100000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	335100000	USD
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	595300000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	65300000	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	16800000	USD
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	1700000	USD
CY2019	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	347900000	USD
CY2020	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	306300000	USD
CY2021	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	334300000	USD
CY2019	amg	Payments For Affiliate Equity Repurchases PaymentsForAffiliateEquityRepurchases	146000000.0	USD
CY2020	amg	Payments For Affiliate Equity Repurchases PaymentsForAffiliateEquityRepurchases	315100000	USD
CY2021	amg	Payments For Affiliate Equity Repurchases PaymentsForAffiliateEquityRepurchases	150500000	USD
CY2019	amg	Proceeds From Affiliate Equity Issuances ProceedsFromAffiliateEquityIssuances	10500000	USD
CY2020	amg	Proceeds From Affiliate Equity Issuances ProceedsFromAffiliateEquityIssuances	20200000	USD
CY2021	amg	Proceeds From Affiliate Equity Issuances ProceedsFromAffiliateEquityIssuances	117700000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	539600000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1039700000	USD
CY2019	amg	Subscriptionsto Affiliate Sponsored Consolidated Products Netof Redemptions SubscriptionstoAffiliateSponsoredConsolidatedProductsNetofRedemptions	19000000.0	USD
CY2020	amg	Subscriptionsto Affiliate Sponsored Consolidated Products Netof Redemptions SubscriptionstoAffiliateSponsoredConsolidatedProductsNetofRedemptions	12900000	USD
CY2021	amg	Subscriptionsto Affiliate Sponsored Consolidated Products Netof Redemptions SubscriptionstoAffiliateSponsoredConsolidatedProductsNetofRedemptions	40900000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-9600000	USD
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-40000000.0	USD
CY2021	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-42100000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-934700000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-455400000	USD
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-798300000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	8700000	USD
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2100000	USD
CY2021	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-800000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-21300000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	502300000	USD
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-123600000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	565500000	USD
CY2019	us-gaap	Cash Divested From Deconsolidation CashDivestedFromDeconsolidation	4600000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	88300000	USD
CY2020	us-gaap	Cash Divested From Deconsolidation CashDivestedFromDeconsolidation	2200000	USD
CY2021	us-gaap	Cash Divested From Deconsolidation CashDivestedFromDeconsolidation	7600000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	539600000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1039700000	USD
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	908500000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	84100000	USD
CY2021	us-gaap	Interest Paid Net InterestPaidNet	103000000.0	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	102700000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-12400000	USD
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	87100000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	35400000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	39100000	USD
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	38800000	USD
CY2019	amg	Payables Recorded But Not Yet Paid Investments In Affiliates PayablesRecordedButNotYetPaidInvestmentsInAffiliates	0	USD
CY2020	amg	Payables Recorded But Not Yet Paid Investments In Affiliates PayablesRecordedButNotYetPaidInvestmentsInAffiliates	109200000	USD
CY2021	amg	Payables Recorded But Not Yet Paid Investments In Affiliates PayablesRecordedButNotYetPaidInvestmentsInAffiliates	287800000	USD
CY2019	amg	Stock Issued Under Other Incentive Plans StockIssuedUnderOtherIncentivePlans	32700000	USD
CY2020	amg	Stock Issued Under Other Incentive Plans StockIssuedUnderOtherIncentivePlans	35600000	USD
CY2021	amg	Stock Issued Under Other Incentive Plans StockIssuedUnderOtherIncentivePlans	82600000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	189700000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	24400000	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	26300000	USD
CY2019	amg	Shares Receivedfor Tax Withholdingfor Share Based Compensation Value SharesReceivedforTaxWithholdingforShareBasedCompensationValue	6400000	USD
CY2020	amg	Shares Receivedfor Tax Withholdingfor Share Based Compensation Value SharesReceivedforTaxWithholdingforShareBasedCompensationValue	6700000	USD
CY2021	amg	Shares Receivedfor Tax Withholdingfor Share Based Compensation Value SharesReceivedforTaxWithholdingforShareBasedCompensationValue	19900000	USD
CY2019	amg	Payables Recorded But Not Yet Paid Share Repurchases PayablesRecordedButNotYetPaidShareRepurchases	10600000	USD
CY2020	amg	Payables Recorded But Not Yet Paid Share Repurchases PayablesRecordedButNotYetPaidShareRepurchases	105600000	USD
CY2021	amg	Payables Recorded But Not Yet Paid Share Repurchases PayablesRecordedButNotYetPaidShareRepurchases	16700000	USD
CY2019	amg	Payables Recorded For Affiliate Equity Purchases PayablesRecordedForAffiliateEquityPurchases	19800000	USD
CY2020	amg	Payables Recorded For Affiliate Equity Purchases PayablesRecordedForAffiliateEquityPurchases	22000000.0	USD
CY2021	amg	Payables Recorded For Affiliate Equity Purchases PayablesRecordedForAffiliateEquityPurchases	11000000.0	USD
CY2021	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	1	segment
CY2021	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	Certain reclassifications have been made to the prior period’s financial statements to conform to the current period’s presentation.
CY2021	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.
CY2021	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	Concentration of Credit RiskFinancial instruments that potentially subject the Company to significant concentrations of credit risk consist principally of cash investments and derivative financial instruments. The Company and its Affiliates maintain cash and cash equivalents, investments, and, at times, certain derivative financial instruments with various high credit-quality financial institutions. These financial institutions are typically located in countries in which the Company and its Affiliates operate. For the Company and certain of its Affiliates, cash deposits at a financial institution may exceed Federal Deposit Insurance Corporation insurance limits.
CY2021	amg	Fair Value Investments Entities That Calculate Na Vs Lifeof Fund FairValueInvestmentsEntitiesThatCalculateNAVsLifeofFund	P15Y
CY2020Q4	amg	Marketable Securities Cost MarketableSecuritiesCost	69400000	USD
CY2021Q4	amg	Marketable Securities Cost MarketableSecuritiesCost	73200000	USD
CY2020Q4	amg	Marketable Securities Unrealized Gains MarketableSecuritiesUnrealizedGains	5500000	USD
CY2021Q4	amg	Marketable Securities Unrealized Gains MarketableSecuritiesUnrealizedGains	8100000	USD
CY2020Q4	amg	Marketable Securities Unrealized Losses MarketableSecuritiesUnrealizedLosses	0.0	USD
CY2021Q4	amg	Marketable Securities Unrealized Losses MarketableSecuritiesUnrealizedLosses	2800000	USD
CY2020Q4	us-gaap	Marketable Securities MarketableSecurities	74900000	USD
CY2021Q4	us-gaap	Marketable Securities MarketableSecurities	78500000	USD
CY2020Q4	us-gaap	Fair Value Investments Entities That Calculate Net Asset Value Per Share Unfunded Committments FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments	122200000	USD
CY2021Q4	us-gaap	Fair Value Investments Entities That Calculate Net Asset Value Per Share Unfunded Committments FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments	156300000	USD
CY2020Q4	amg	Equity Securities Without Readily Determinable Fair Value Cost EquitySecuritiesWithoutReadilyDeterminableFairValueCost	8500000	USD
CY2021Q4	amg	Equity Securities Without Readily Determinable Fair Value Cost EquitySecuritiesWithoutReadilyDeterminableFairValueCost	8500000	USD
CY2020Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Cumulative Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentCumulativeAmount	5300000	USD
CY2021Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Cumulative Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentCumulativeAmount	41900000	USD
CY2020Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	13800000	USD
CY2021Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	50400000	USD
CY2021	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	36600000	USD
CY2019Q4	us-gaap	Other Investments OtherInvestments	211800000	USD
CY2020Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	13800000	USD
CY2019Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	0	USD
CY2020Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	13800000	USD
CY2020Q4	us-gaap	Other Investments OtherInvestments	257200000	USD
CY2020	amg	Equity Securities Without Readily Determinable Fair Value Net Gain Loss EquitySecuritiesWithoutReadilyDeterminableFairValueNetGainLoss	5300000	USD
CY2020	amg	Other Investments Gain Loss Net OtherInvestmentsGainLossNet	23300000	USD
CY2021	amg	Equity Securities Without Readily Determinable Fair Value Net Gain Loss EquitySecuritiesWithoutReadilyDeterminableFairValueNetGainLoss	36600000	USD
CY2021	amg	Other Investments Gain Loss Net OtherInvestmentsGainLossNet	116100000	USD
CY2020	amg	Equity Securities Without Readily Determinable Fair Value Purchases And Commitments EquitySecuritiesWithoutReadilyDeterminableFairValuePurchasesAndCommitments	8500000	USD
CY2020	amg	Other Investments Purchases OtherInvestmentsPurchases	44800000	USD
CY2021	amg	Equity Securities Without Readily Determinable Fair Value Purchases And Commitments EquitySecuritiesWithoutReadilyDeterminableFairValuePurchasesAndCommitments	0	USD
CY2021	amg	Other Investments Purchases OtherInvestmentsPurchases	60300000	USD
CY2020	amg	Equity Securities Without Readily Determinable Fair Value Sales And Distributions EquitySecuritiesWithoutReadilyDeterminableFairValueSalesAndDistributions	0	USD
CY2020	amg	Other Investments Sales OtherInvestmentsSales	22700000	USD
CY2021	amg	Equity Securities Without Readily Determinable Fair Value Sales And Distributions EquitySecuritiesWithoutReadilyDeterminableFairValueSalesAndDistributions	0	USD
CY2021	amg	Other Investments Sales OtherInvestmentsSales	58400000	USD
CY2020Q4	us-gaap	Other Investments OtherInvestments	257200000	USD
CY2021Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	50400000	USD
CY2021Q4	us-gaap	Other Investments OtherInvestments	375200000	USD
CY2020Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	2074800000	USD
CY2021Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	2134400000	USD
CY2020Q4	us-gaap	Equity Method Investments EquityMethodInvestments	112700000	USD
CY2021Q4	us-gaap	Equity Method Investments EquityMethodInvestments	111400000	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	2312100000	USD
CY2021Q4	us-gaap	Long Term Debt LongTermDebt	2490400000	USD
CY2021Q4	amg	Investment Commitment Amount InvestmentCommitmentAmount	156300000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	2651700000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	2661400000	USD
CY2020	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
CY2021	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	30500000	USD
CY2020	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	11600000	USD
CY2021	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-1100000	USD
CY2020	us-gaap	Goodwill Other Increase Decrease GoodwillOtherIncreaseDecrease	-1900000	USD
CY2021	us-gaap	Goodwill Other Increase Decrease GoodwillOtherIncreaseDecrease	-1600000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	2661400000	USD
CY2021Q4	us-gaap	Goodwill Goodwill	2689200000	USD
	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020	amg	Finite Lived Intangible Asset Accumulated Amortization Foreign Currency Translation FiniteLivedIntangibleAssetAccumulatedAmortizationForeignCurrencyTranslation	3700000	USD
CY2021	amg	Finite Lived Intangible Asset Accumulated Amortization Foreign Currency Translation FiniteLivedIntangibleAssetAccumulatedAmortizationForeignCurrencyTranslation	600000	USD
CY2020Q4	amg	Number Of Affiliates Equity Method Investment NumberOfAffiliatesEquityMethodInvestment	18	affiliate
CY2021Q4	amg	Number Of Affiliates Equity Method Investment NumberOfAffiliatesEquityMethodInvestment	21	affiliate
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	41700000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	37600000	USD
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	33800000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	2100000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	800000	USD
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	800000	USD
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	100000	USD
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	0.0	USD
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	0.0	USD
CY2019	us-gaap	Sublease Income SubleaseIncome	4400000	USD
CY2020	us-gaap	Sublease Income SubleaseIncome	5000000.0	USD
CY2021	us-gaap	Sublease Income SubleaseIncome	7900000	USD
CY2019	us-gaap	Lease Cost LeaseCost	39500000	USD
CY2020	us-gaap	Lease Cost LeaseCost	33400000	USD
CY2021	us-gaap	Lease Cost LeaseCost	26700000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.04
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.03
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	27500000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	38900000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	36300000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	32000000.0	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	17800000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	58800000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	211300000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	35000000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	255100000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	239200000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	175500000	USD
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	165300000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	79600000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	73900000	USD
CY2020Q4	us-gaap	Employee Related Liabilities Current And Noncurrent EmployeeRelatedLiabilitiesCurrentAndNoncurrent	400000000.0	USD
CY2021Q4	us-gaap	Employee Related Liabilities Current And Noncurrent EmployeeRelatedLiabilitiesCurrentAndNoncurrent	545500000	USD
CY2020Q4	us-gaap	Other Accrued Liabilities Current And Noncurrent OtherAccruedLiabilitiesCurrentAndNoncurrent	312400000	USD
CY2021Q4	us-gaap	Other Accrued Liabilities Current And Noncurrent OtherAccruedLiabilitiesCurrentAndNoncurrent	243600000	USD
CY2020Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	712400000	USD
CY2021Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	789100000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	49900000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	8200000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	67400000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	10300000	USD
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	63400000	USD
CY2021	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	8000000.0	USD
CY2019	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	3200000	USD
CY2020	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	3900000	USD
CY2021	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	200000	USD
CY2020Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	86200000	USD
CY2021Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	70900000	USD
CY2021	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	18900000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	24100000	USD
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	51700000	USD
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	2900000	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	82.14
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0.0	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	150.68
CY2021	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	300000	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	120.58
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	0.0	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	154.44
CY2021	amg	Share Based Compensation Arrangement By Share Based Payment Award Options Period Increase Decrease Performance Condition Changes ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsPeriodIncreaseDecreasePerformanceConditionChanges	600000	shares
CY2021	amg	Share Based Compensation Arrangements By Share Based Payment Award Options Performance Condition Changes Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsPerformanceConditionChangesWeightedAverageExercisePrice	74.74
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	3200000	shares
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	77.39
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4Y7M6D
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	100000	shares
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	137.88
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P1Y6M
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	34200000	USD
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	4400000	USD
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	2000000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	200000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	0	USD
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	13400000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	900000	USD
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	0	USD
CY2021	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	3600000	USD
CY2021Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	3400000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	18.36
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	18.33
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	54.19
CY2019Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	916700000	USD
CY2020Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	671500000	USD
CY2020	amg	Noncontrolling Interest Increase Decrease Attributable To Consolidated Partnerships NoncontrollingInterestIncreaseDecreaseAttributableToConsolidatedPartnerships	13800000	USD
CY2021	amg	Noncontrolling Interest Increase Decrease Attributable To Consolidated Partnerships NoncontrollingInterestIncreaseDecreaseAttributableToConsolidatedPartnerships	-10400000	USD
CY2020	amg	Noncontrolling Interest Decreasefrom Transfersto Other Liabilities NoncontrollingInterestDecreasefromTransferstoOtherLiabilities	310600000	USD
CY2021	amg	Noncontrolling Interest Decreasefrom Transfersto Other Liabilities NoncontrollingInterestDecreasefromTransferstoOtherLiabilities	112700000	USD
CY2020	amg	Noncontrolling Interest Decreasefrom Transfersto Noncontrolling Interest Holders NoncontrollingInterestDecreasefromTransferstoNoncontrollingInterestHolders	-7800000	USD
CY2021	amg	Noncontrolling Interest Decreasefrom Transfersto Noncontrolling Interest Holders NoncontrollingInterestDecreasefromTransferstoNoncontrollingInterestHolders	3900000	USD
CY2020	amg	Redeemable Noncontrolling Interest Change In Redemption Value RedeemableNoncontrollingInterestChangeInRedemptionValue	-59400000	USD
CY2021	amg	Redeemable Noncontrolling Interest Change In Redemption Value RedeemableNoncontrollingInterestChangeInRedemptionValue	-121600000	USD
CY2020Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	671500000	USD
CY2021Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	673900000	USD
CY2019	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	347900000	USD
CY2020	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	306300000	USD
CY2021	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	334300000	USD
CY2019	amg	Payments For Affiliate Equity Repurchases PaymentsForAffiliateEquityRepurchases	146000000	USD
CY2020	amg	Payments For Affiliate Equity Repurchases PaymentsForAffiliateEquityRepurchases	315100000	USD
CY2021	amg	Payments For Affiliate Equity Repurchases PaymentsForAffiliateEquityRepurchases	150500000	USD
CY2019	amg	Proceeds From Affiliate Equity Issuances ProceedsFromAffiliateEquityIssuances	10500000	USD
CY2020	amg	Proceeds From Affiliate Equity Issuances ProceedsFromAffiliateEquityIssuances	20200000	USD
CY2021	amg	Proceeds From Affiliate Equity Issuances ProceedsFromAffiliateEquityIssuances	117700000	USD
CY2019	amg	Affiliate Equity Compensation Expense Including Portion Attributableto Noncontrolling Interest AffiliateEquityCompensationExpenseIncludingPortionAttributabletoNoncontrollingInterest	40500000	USD
CY2021	amg	Adjustments To Additional Paid In Capital Decrease In Carrying Amount Of Redeemable Noncontrolling Interests AdjustmentsToAdditionalPaidInCapitalDecreaseInCarryingAmountOfRedeemableNoncontrollingInterests	63200000	USD
CY2020	amg	Affiliate Equity Compensation Expense Including Portion Attributableto Noncontrolling Interest AffiliateEquityCompensationExpenseIncludingPortionAttributabletoNoncontrollingInterest	51800000	USD
CY2021	amg	Affiliate Equity Compensation Expense Including Portion Attributableto Noncontrolling Interest AffiliateEquityCompensationExpenseIncludingPortionAttributabletoNoncontrollingInterest	63300000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	15700000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	202200000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	565700000	USD
CY2019	amg	Adjustments To Additional Paid In Capital Increase Decrease In Carrying Amount Of Redeemable Noncontrolling Interests AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterests	3100000	USD
CY2020	amg	Adjustments To Additional Paid In Capital Increase Decrease In Carrying Amount Of Redeemable Noncontrolling Interests AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterests	-1100000	USD
CY2021	amg	Adjustments To Additional Paid In Capital Increase Decrease In Carrying Amount Of Redeemable Noncontrolling Interests AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterests	17500000	USD
CY2019	amg	Adjustments To Additional Paid In Capital Decrease In Carrying Amount Of Redeemable Noncontrolling Interests AdjustmentsToAdditionalPaidInCapitalDecreaseInCarryingAmountOfRedeemableNoncontrollingInterests	50800000	USD
CY2020	amg	Adjustments To Additional Paid In Capital Decrease In Carrying Amount Of Redeemable Noncontrolling Interests AdjustmentsToAdditionalPaidInCapitalDecreaseInCarryingAmountOfRedeemableNoncontrollingInterests	239100000	USD
CY2019	amg	Increase Decrease In Equity Due To Profit Loss And Net Transfers With Noncontrolling Interests IncreaseDecreaseInEquityDueToProfitLossAndNetTransfersWithNoncontrollingInterests	-38200000	USD
CY2020	amg	Increase Decrease In Equity Due To Profit Loss And Net Transfers With Noncontrolling Interests IncreaseDecreaseInEquityDueToProfitLossAndNetTransfersWithNoncontrollingInterests	-35800000	USD
CY2021	amg	Increase Decrease In Equity Due To Profit Loss And Net Transfers With Noncontrolling Interests IncreaseDecreaseInEquityDueToProfitLossAndNetTransfersWithNoncontrollingInterests	485000000.0	USD
CY2019	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	19400000	USD
CY2020	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	17600000	USD
CY2021	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	19100000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2900000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	81400000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	251000000.0	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-18200000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	17000000.0	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-9600000	USD
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	73100000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-8800000	USD
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	19600000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	85700000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	47200000	USD
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	67100000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	58700000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	54600000	USD
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	159800000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-23900000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	20100000	USD
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	55900000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	3400000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	5400000	USD
CY2021	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	22300000	USD
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	13000000.0	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-35300000	USD
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	1300000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-55800000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	26800000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	91200000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2900000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	81400000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	251000000.0	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	152200000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	446100000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	698200000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	155800000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	62200000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	442800000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	308000000.0	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	508300000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1141000000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.035
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.035
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.035
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-4.712
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.085
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.017
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	2.406
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	0.058
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	0.020
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.030
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.024
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-1.072
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.069
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.011
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies EffectiveIncomeTaxRateReconciliationTaxContingencies	4.204
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies EffectiveIncomeTaxRateReconciliationTaxContingencies	-0.011
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies EffectiveIncomeTaxRateReconciliationTaxContingencies	0.001
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	-1.204
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	-0.062
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies Domestic EffectiveIncomeTaxRateReconciliationTaxContingenciesDomestic	-1.957
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies Domestic EffectiveIncomeTaxRateReconciliationTaxContingenciesDomestic	0.008
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies Domestic EffectiveIncomeTaxRateReconciliationTaxContingenciesDomestic	0.004
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.720
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.004
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.001
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.009
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.160
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.220
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	15400000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	12500000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	17000000.0	USD
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	16900000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	19700000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	22200000	USD
CY2020Q4	amg	Deferred Tax Assets Tax Benefit On Uncertain Tax Positions DeferredTaxAssetsTaxBenefitOnUncertainTaxPositions	26300000	USD
CY2021Q4	amg	Deferred Tax Liabilities Nondeductible Intangible Assets Amortization DeferredTaxLiabilitiesNondeductibleIntangibleAssetsAmortization	149200000	USD
CY2021Q4	amg	Deferred Tax Assets Tax Benefit On Uncertain Tax Positions DeferredTaxAssetsTaxBenefitOnUncertainTaxPositions	17400000	USD
CY2020Q4	amg	Deferred Tax Assets Operating Lease Liability DeferredTaxAssetsOperatingLeaseLiability	10000000.0	USD
CY2021Q4	amg	Deferred Tax Assets Operating Lease Liability DeferredTaxAssetsOperatingLeaseLiability	7600000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	8200000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	8700000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	0	USD
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1300000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	96600000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	86600000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	35600000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	43900000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	61000000.0	USD
CY2021Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	42700000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	235600000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	255900000	USD
CY2020Q4	amg	Deferred Tax Liabilities Nondeductible Intangible Assets Amortization DeferredTaxLiabilitiesNondeductibleIntangibleAssetsAmortization	116600000	USD
CY2020Q4	amg	Deferred Tax Liabilities Convertible Securities Interest DeferredTaxLiabilitiesConvertibleSecuritiesInterest	99300000	USD
CY2021Q4	amg	Deferred Tax Liabilities Convertible Securities Interest DeferredTaxLiabilitiesConvertibleSecuritiesInterest	101700000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	7300000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	5900000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Tax Deferred Income DeferredTaxLiabilitiesTaxDeferredIncome	10700000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Tax Deferred Income DeferredTaxLiabilitiesTaxDeferredIncome	27300000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	8500000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	4000000.0	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	478000000.0	USD
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	544000000.0	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	417000000.0	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	501300000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	8700000	USD
CY2021Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	321600000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	33100000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	65400000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	63500000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	39800000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1100000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	800000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	3200000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1700000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	4600000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	3500000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	400000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	5600000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	4000000.0	USD
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	7600000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	5700000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	400000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	5500000	USD
CY2019	amg	Unrecognized Tax Benefits Increase Decrease Relatedto Foreign Exchange Rates UnrecognizedTaxBenefitsIncreaseDecreaseRelatedtoForeignExchangeRates	-2800000	USD
CY2020	amg	Unrecognized Tax Benefits Increase Decrease Relatedto Foreign Exchange Rates UnrecognizedTaxBenefitsIncreaseDecreaseRelatedtoForeignExchangeRates	3300000	USD
CY2021	amg	Unrecognized Tax Benefits Increase Decrease Relatedto Foreign Exchange Rates UnrecognizedTaxBenefitsIncreaseDecreaseRelatedtoForeignExchangeRates	300000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	65400000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	63500000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	52400000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	65400000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	63500000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	52400000	USD
CY2021Q4	amg	Deferred Tax Assets Tax Benefit On Uncertain Tax Positions DeferredTaxAssetsTaxBenefitOnUncertainTaxPositions	17400000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	8400000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	800000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	-400000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	11400000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	11000000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	15700000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	202200000	USD
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	565700000	USD
CY2019	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	0	USD
CY2020	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	0	USD
CY2021	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	18500000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	15700000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	202200000	USD
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	584200000	USD
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	50500000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	46500000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	41500000	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	100000	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	200000	shares
CY2021	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1200000	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	0	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	0	shares
CY2021	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	2100000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	50600000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	46700000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	44800000	shares
CY2019	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-9700000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-22300000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	12600000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	23600000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	9900000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	13700000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	11200000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	4000000.0	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	7200000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	14300000	USD
CY2020	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	600000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	13700000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	6600000	USD
CY2021	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-600000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	7200000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2239600000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2027500000	USD
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2412400000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	79600000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	73900000	USD

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AFFILIATED MANAGERS GROUP, INC. Stock $amg

2021 Q4 Form 10-K Financial Statement

#000100443422000017 Filed on February 18, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMG AFFILIATED MANAGERS GROUP, INC. Stock $amg

2021 Q4 Form 10-K Financial Statement

#000100443422000017 Filed on February 18, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMG
AFFILIATED MANAGERS GROUP, INC. Stock $amg