$AMG
AFFILIATED MANAGERS GROUP, INC. Stock $amg

$amg Overview Financials Valuation SEC Filings Company Website

2018 Form 10-K Financial Statement

#000100443419000008 Filed on February 22, 2019

Income Statement

Concept	2018	2017 Q4	2017 Q3
Revenue	$2.378B	$604.1M	$585.7M
YoY Change	3.18%	9.76%	7.53%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin	$417.7M	$359.5M	$91.90M
YoY Change	11.95%	5.46%	-2.44%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$136.8M	$26.70M	$26.00M
YoY Change	28.21%	-17.85%	-18.5%
% of Gross Profit
Operating Expenses	$1.692B	$412.2M	$389.6M
YoY Change	5.45%	9.45%	4.25%
Operating Profit		$280.0M	$289.5M
YoY Change		-7.25%	21.38%
Interest Expense	$80.60M	$72.10M	$22.10M
YoY Change	-8.2%	-33.3%	-1.34%
% of Operating Profit		25.75%	7.63%
Other Income/Expense, Net			-$6.600M
YoY Change			-46.34%
Pretax Income	$713.6M	$264.0M	$282.9M
YoY Change	-33.13%	-6.35%	25.07%
Income Tax	$181.3M	$87.10M	$66.10M
% Of Pretax Income	25.41%	32.99%	23.37%
Net Earnings	$243.6M	$315.4M	$125.4M
YoY Change	-64.67%	109.99%	13.79%
Net Earnings / Revenue	10.24%	52.21%	21.41%
Basic Earnings Per Share	$4.55		$2.25
Diluted Earnings Per Share	$4.52	$5.50	$2.22
COMMON SHARES
Basic Shares Outstanding	53.60M shares	55.58M shares	55.80M shares
Diluted Shares Outstanding	53.80M shares		58.30M shares

Balance Sheet

Concept	2018	2017 Q4	2017 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$565.5M	$517.3M	$467.1M
YoY Change	28.67%	-6.49%	-26.46%
Cash & Equivalents	$565.5M	$439.5M	$374.7M
Short-Term Investments		$77.80M	$92.40M
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables	$400.6M	$433.8M	$487.4M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$966.1M	$873.3M	$862.1M
YoY Change	10.63%	7.27%	6.55%
LONG-TERM ASSETS
Property, Plant & Equipment	$104.3M	$111.0M	$111.7M
YoY Change	-6.04%	0.82%	-1.5%
Goodwill		$2.663B	$2.662B
YoY Change		1.31%	0.66%
Intangibles		$1.450B	$1.467B
YoY Change		-3.19%	-5.12%
Long-Term Investments	$3.111B	$539.0M	$3.544B
YoY Change	-12.29%	-84.0%	12.4%
Other Assets
YoY Change
Total Long-Term Assets	$7.253B	$7.829B	$7.839B
YoY Change	-7.35%	-1.34%	4.33%
TOTAL ASSETS
Total Short-Term Assets	$966.1M	$873.3M	$862.1M
Total Long-Term Assets	$7.253B	$7.829B	$7.839B
Total Assets	$8.219B	$8.702B	$8.701B
YoY Change	-5.55%	-0.54%	4.54%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable			$698.3M
YoY Change			20.52%
Accrued Expenses	$463.2M	$611.1M
YoY Change	-24.2%
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	$746.6M	$807.2M	$698.3M
YoY Change	-7.51%	10.68%	20.52%
LONG-TERM LIABILITIES
Long-Term Debt	$1.830B	$1.855B	$1.914B
YoY Change	-1.35%	-12.08%	-9.45%
Other Long-Term Liabilities	$162.7M	$182.4M	$178.3M
YoY Change	-10.8%	22.09%	4.7%
Total Long-Term Liabilities	$1.992B	$2.037B	$2.092B
YoY Change	-2.2%	-9.82%	-8.39%
TOTAL LIABILITIES
Total Short-Term Liabilities	$746.6M	$807.2M	$698.3M
Total Long-Term Liabilities	$1.992B	$2.037B	$2.092B
Total Liabilities	$4.762B	$3.312B	$3.493B
YoY Change	-2.42%	-9.25%	-0.64%
SHAREHOLDERS EQUITY
Retained Earnings		$3.699B	$3.394B
YoY Change		21.09%	16.94%
Common Stock		$809.2M	$850.3M
YoY Change		-24.66%	9.82%
Preferred Stock
YoY Change
Treasury Stock (at cost)		$663.7M	$566.1M
YoY Change		71.94%	36.9%
Treasury Stock Shares		3.400M shares
Shareholders Equity	$3.457B	$3.822B	$3.628B
YoY Change
Total Liabilities & Shareholders Equity	$8.219B	$8.702B	$8.701B
YoY Change	-5.55%	-0.54%	4.54%

Cashflow Statement

Concept	2018	2017 Q4	2017 Q3
OPERATING ACTIVITIES
Net Income	$243.6M	$315.4M	$125.4M
YoY Change	-64.67%	109.99%	13.79%
Depreciation, Depletion And Amortization	$136.8M	$26.70M	$26.00M
YoY Change	28.21%	-17.85%	-18.5%
Cash From Operating Activities	$1.141B	$369.9M	$356.5M
YoY Change	-2.55%	1.31%	4.24%
INVESTING ACTIVITIES
Capital Expenditures	$18.70M	-$4.600M	-$6.700M
YoY Change	1.08%	-9.8%	3.08%
Acquisitions
YoY Change
Other Investing Activities	$500.0K	$13.50M	$10.60M
YoY Change	-98.45%	-102.95%	-103.29%
Cash From Investing Activities	-$18.20M	$8.900M	$3.900M
YoY Change	-231.88%	-101.92%	-101.19%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$486.4M
YoY Change	57.21%
Debt Paid & Issued, Net	$1.181B
YoY Change	46.66%
Cash From Financing Activities	-$983.1M	-318.2M	-354.3M
YoY Change	-17.37%	-295.33%	-780.04%
NET CHANGE
Cash From Operating Activities	$1.141B	369.9M	356.5M
Cash From Investing Activities	-$18.20M	8.900M	3.900M
Cash From Financing Activities	-$983.1M	-318.2M	-354.3M
Net Change In Cash	$129.2M	60.60M	6.100M
YoY Change	1385.06%	-6.05%	-90.67%
FREE CASH FLOW
Cash From Operating Activities	$1.141B	$369.9M	$356.5M
Capital Expenditures	$18.70M	-$4.600M	-$6.700M
Free Cash Flow	$1.122B	$374.5M	$363.2M
YoY Change	-2.6%	1.16%	4.22%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2016	amg	Adjustmentsto Additional Paidin Capital Stock Issued Issuance Costsand Other AdjustmentstoAdditionalPaidinCapitalStockIssuedIssuanceCostsandOther	-3000000	USD
CY2017	amg	Adjustmentsto Additional Paidin Capital Stock Issued Issuance Costsand Other AdjustmentstoAdditionalPaidinCapitalStockIssuedIssuanceCostsandOther	600000	USD
CY2018	amg	Adjustmentsto Additional Paidin Capital Stock Issued Issuance Costsand Other AdjustmentstoAdditionalPaidinCapitalStockIssuedIssuanceCostsandOther	-500000	USD
CY2016	amg	Affiliate Equity Compensation Expense Including Portion Attributableto Noncontrolling Interest AffiliateEquityCompensationExpenseIncludingPortionAttributabletoNoncontrollingInterest	41200000	USD
CY2017	amg	Affiliate Equity Compensation Expense Including Portion Attributableto Noncontrolling Interest AffiliateEquityCompensationExpenseIncludingPortionAttributabletoNoncontrollingInterest	50000000	USD
CY2018	amg	Affiliate Equity Compensation Expense Including Portion Attributableto Noncontrolling Interest AffiliateEquityCompensationExpenseIncludingPortionAttributabletoNoncontrollingInterest	56400000	USD
CY2016	amg	Amortizationand Impairmentsof Intangible Assets AmortizationandImpairmentsofIntangibleAssets	110200000	USD
CY2017	amg	Amortizationand Impairmentsof Intangible Assets AmortizationandImpairmentsofIntangibleAssets	86400000	USD
CY2018	amg	Amortizationand Impairmentsof Intangible Assets AmortizationandImpairmentsofIntangibleAssets	114800000	USD
CY2017Q4	amg	Deferred Tax Assets Tax Benefit On Uncertain Tax Positions DeferredTaxAssetsTaxBenefitOnUncertainTaxPositions	11400000	USD
CY2018Q4	amg	Deferred Tax Assets Tax Benefit On Uncertain Tax Positions DeferredTaxAssetsTaxBenefitOnUncertainTaxPositions	10900000	USD
CY2017Q4	amg	Deferred Tax Liabilities Convertible Securities Interest DeferredTaxLiabilitiesConvertibleSecuritiesInterest	77900000	USD
CY2017Q4	amg	Accumulated Other Comprehensive Income Loss Attributable To Parent Net Of Tax AccumulatedOtherComprehensiveIncomeLossAttributableToParentNetOfTax	-21800000	USD
CY2018Q4	amg	Accumulated Other Comprehensive Income Loss Attributable To Parent Net Of Tax AccumulatedOtherComprehensiveIncomeLossAttributableToParentNetOfTax	-109000000	USD
CY2016	amg	Adjustmentsto Additional Paidin Capital Decreasein Carrying Amountof Redeemable Noncontrolling Interests AdjustmentstoAdditionalPaidinCapitalDecreaseinCarryingAmountofRedeemableNoncontrollingInterests	38000000	USD
CY2017	amg	Adjustmentsto Additional Paidin Capital Decreasein Carrying Amountof Redeemable Noncontrolling Interests AdjustmentstoAdditionalPaidinCapitalDecreaseinCarryingAmountofRedeemableNoncontrollingInterests	116200000	USD
CY2018	amg	Adjustmentsto Additional Paidin Capital Decreasein Carrying Amountof Redeemable Noncontrolling Interests AdjustmentstoAdditionalPaidinCapitalDecreaseinCarryingAmountofRedeemableNoncontrollingInterests	67900000	USD
CY2016	amg	Adjustmentsto Additional Paidin Capital Increasein Carrying Amountof Redeemable Noncontrolling Interests AdjustmentstoAdditionalPaidinCapitalIncreaseinCarryingAmountofRedeemableNoncontrollingInterests	1600000	USD
CY2017	amg	Adjustmentsto Additional Paidin Capital Increasein Carrying Amountof Redeemable Noncontrolling Interests AdjustmentstoAdditionalPaidinCapitalIncreaseinCarryingAmountofRedeemableNoncontrollingInterests	-1000000	USD
CY2018	amg	Adjustmentsto Additional Paidin Capital Increasein Carrying Amountof Redeemable Noncontrolling Interests AdjustmentstoAdditionalPaidinCapitalIncreaseinCarryingAmountofRedeemableNoncontrollingInterests	-5000000	USD
	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2018Q4	amg	Deferred Tax Liabilities Convertible Securities Interest DeferredTaxLiabilitiesConvertibleSecuritiesInterest	84500000	USD
CY2017Q4	amg	Deferred Tax Liabilities Nondeductible Intangible Assets Amortization DeferredTaxLiabilitiesNondeductibleIntangibleAssetsAmortization	150800000	USD
CY2018Q4	amg	Deferred Tax Liabilities Nondeductible Intangible Assets Amortization DeferredTaxLiabilitiesNondeductibleIntangibleAssetsAmortization	141000000	USD
CY2016	amg	Depreciation And Other Amortization DepreciationAndOtherAmortization	19500000	USD
CY2017	amg	Depreciation And Other Amortization DepreciationAndOtherAmortization	20300000	USD
CY2018	amg	Depreciation And Other Amortization DepreciationAndOtherAmortization	22000000	USD
CY2018Q4	amg	Derivative Net Liability Position Numberof Instruments DerivativeNetLiabilityPositionNumberofInstruments	0	derivative
CY2018	amg	Equity Methodand Costmethod Investments Otherthan Temporary Impairment EquityMethodandCostmethodInvestmentsOtherthanTemporaryImpairment	0	USD
CY2017	amg	Fair Value Assumptions Average Projected Growth Rate FairValueAssumptionsAverageProjectedGrowthRate	0.1
CY2018	amg	Fair Value Assumptions Average Projected Growth Rate FairValueAssumptionsAverageProjectedGrowthRate	0.025
CY2017	amg	Fair Value Assumptions Discount Rate For Assets Based Fees FairValueAssumptionsDiscountRateForAssetsBasedFees	0.14
CY2018	amg	Fair Value Assumptions Discount Rate For Assets Based Fees FairValueAssumptionsDiscountRateForAssetsBasedFees	0.11
CY2017	amg	Fair Value Assumptions Discount Rate For Performance Fees FairValueAssumptionsDiscountRateForPerformanceFees	0.25
CY2018	amg	Fair Value Assumptions Discount Rate For Performance Fees FairValueAssumptionsDiscountRateForPerformanceFees	0.20
CY2017	amg	Fair Value Assumptions Market Participant Tax Rate FairValueAssumptionsMarketParticipantTaxRate	0.25
CY2018	amg	Fair Value Assumptions Market Participant Tax Rate FairValueAssumptionsMarketParticipantTaxRate	0.25
CY2018	amg	Fair Value Investments Entities That Calculate Na Vs Lifeof Fund FairValueInvestmentsEntitiesThatCalculateNAVsLifeofFund	P15Y
CY2016	amg	Income Tax Expense From Controlling Interest To Pretax Income From Continued Operations Attributable To Controlling Interest Ratio IncomeTaxExpenseFromControllingInterestToPretaxIncomeFromContinuedOperationsAttributableToControllingInterestRatio	0.326
CY2017	amg	Income Tax Expense From Controlling Interest To Pretax Income From Continued Operations Attributable To Controlling Interest Ratio IncomeTaxExpenseFromControllingInterestToPretaxIncomeFromContinuedOperationsAttributableToControllingInterestRatio	0.068
CY2018	amg	Income Tax Expense From Controlling Interest To Pretax Income From Continued Operations Attributable To Controlling Interest Ratio IncomeTaxExpenseFromControllingInterestToPretaxIncomeFromContinuedOperationsAttributableToControllingInterestRatio	0.410
CY2016	amg	Increase Decrease In Equity Due To Profit Loss And Net Transfers With Noncontrolling Interests IncreaseDecreaseInEquityDueToProfitLossAndNetTransfersWithNoncontrollingInterests	436400000	USD
CY2017	amg	Increase Decrease In Equity Due To Profit Loss And Net Transfers With Noncontrolling Interests IncreaseDecreaseInEquityDueToProfitLossAndNetTransfersWithNoncontrollingInterests	572300000	USD
CY2018	amg	Increase Decrease In Equity Due To Profit Loss And Net Transfers With Noncontrolling Interests IncreaseDecreaseInEquityDueToProfitLossAndNetTransfersWithNoncontrollingInterests	170700000	USD
CY2016	amg	Investment And Other Income Loss InvestmentAndOtherIncomeLoss	-46400000	USD
CY2017	amg	Investment And Other Income Loss InvestmentAndOtherIncomeLoss	-64500000	USD
CY2018	amg	Investment And Other Income Loss InvestmentAndOtherIncomeLoss	-27400000	USD
CY2018Q4	amg	Investment Commitment Amount InvestmentCommitmentAmount	131000000	USD
CY2017Q4	amg	Marketable Securities Cost MarketableSecuritiesCost	67100000	USD
CY2018Q4	amg	Marketable Securities Cost MarketableSecuritiesCost	126800000	USD
CY2017Q4	amg	Marketable Securities Unrealized Gains MarketableSecuritiesUnrealizedGains	13000000	USD
CY2018Q4	amg	Marketable Securities Unrealized Gains MarketableSecuritiesUnrealizedGains	1100000	USD
CY2017Q4	amg	Marketable Securities Unrealized Losses MarketableSecuritiesUnrealizedLosses	2300000	USD
CY2018Q4	amg	Marketable Securities Unrealized Losses MarketableSecuritiesUnrealizedLosses	8600000	USD
CY2016	amg	Noncontrolling Interest Decreasefrom Redemptions NoncontrollingInterestDecreasefromRedemptions	71400000	USD
CY2017	amg	Noncontrolling Interest Decreasefrom Redemptions NoncontrollingInterestDecreasefromRedemptions	241500000	USD
CY2018	amg	Noncontrolling Interest Decreasefrom Redemptions NoncontrollingInterestDecreasefromRedemptions	30800000	USD
CY2016	amg	Noncontrolling Interest Decreasefrom Transfersto Noncontrolling Interest Holders NoncontrollingInterestDecreasefromTransferstoNoncontrollingInterestHolders	42600000	USD
CY2017	amg	Noncontrolling Interest Decreasefrom Transfersto Noncontrolling Interest Holders NoncontrollingInterestDecreasefromTransferstoNoncontrollingInterestHolders	76800000	USD
CY2018	amg	Noncontrolling Interest Decreasefrom Transfersto Noncontrolling Interest Holders NoncontrollingInterestDecreasefromTransferstoNoncontrollingInterestHolders	44800000	USD
CY2017	amg	Noncontrolling Interest Decreasefrom Transfersto Other Liabilities NoncontrollingInterestDecreasefromTransferstoOtherLiabilities	192300000	USD
CY2018	amg	Noncontrolling Interest Decreasefrom Transfersto Other Liabilities NoncontrollingInterestDecreasefromTransferstoOtherLiabilities	105400000	USD
CY2016	amg	Noncontrolling Interest Increase Decreasefrom Purchaseof Interests NoncontrollingInterestIncreaseDecreasefromPurchaseofInterests	-15300000	USD
CY2017	amg	Noncontrolling Interest Increase Decreasefrom Purchaseof Interests NoncontrollingInterestIncreaseDecreasefromPurchaseofInterests	-34600000	USD
CY2018	amg	Noncontrolling Interest Increase Decreasefrom Purchaseof Interests NoncontrollingInterestIncreaseDecreasefromPurchaseofInterests	-6300000	USD
CY2016	amg	Noncontrolling Interest Increasefrom Contributionsfrom Affiliate NoncontrollingInterestIncreasefromContributionsfromAffiliate	4700000	USD
CY2017	amg	Noncontrolling Interest Increasefrom Contributionsfrom Affiliate NoncontrollingInterestIncreasefromContributionsfromAffiliate	6300000	USD
CY2018	amg	Noncontrolling Interest Increasefrom Contributionsfrom Affiliate NoncontrollingInterestIncreasefromContributionsfromAffiliate	17800000	USD
CY2018Q4	amg	Noncontrolling Interest Notificationof Possible Saleof Noncontrolling Interest Percentage NoncontrollingInterestNotificationofPossibleSaleofNoncontrollingInterestPercentage	0.05
CY2017	amg	Redeemable Noncontrolling Interest Change In Redemption Value RedeemableNoncontrollingInterestChangeInRedemptionValue	12400000	USD
CY2018	amg	Purchasesof Securitiesby Affiliate Sponsored Consolidated Products PurchasesofSecuritiesbyAffiliateSponsoredConsolidatedProducts	190800000	USD
CY2018	amg	Number Of Debt Instruments Outstanding NumberOfDebtInstrumentsOutstanding	2	note
CY2018	amg	Operating Loss Carryforwards Foreign Expiration Period OperatingLossCarryforwardsForeignExpirationPeriod	P20Y
CY2016	amg	Payables Recorded But Not Yet Paid Share Repurchases PayablesRecordedButNotYetPaidShareRepurchases	0	USD
CY2017	amg	Payables Recorded But Not Yet Paid Share Repurchases PayablesRecordedButNotYetPaidShareRepurchases	23100000	USD
CY2018	amg	Payables Recorded But Not Yet Paid Share Repurchases PayablesRecordedButNotYetPaidShareRepurchases	6900000	USD
CY2016	amg	Payables Recorded For Affiliate Equity Purchases PayablesRecordedForAffiliateEquityPurchases	12100000	USD
CY2017	amg	Payables Recorded For Affiliate Equity Purchases PayablesRecordedForAffiliateEquityPurchases	47300000	USD
CY2018	amg	Payables Recorded For Affiliate Equity Purchases PayablesRecordedForAffiliateEquityPurchases	36200000	USD
CY2016	amg	Proceeds From Payments For Affiliate Equity Issuances And Repurchases ProceedsFromPaymentsForAffiliateEquityIssuancesAndRepurchases	-104000000	USD
CY2017	amg	Proceeds From Payments For Affiliate Equity Issuances And Repurchases ProceedsFromPaymentsForAffiliateEquityIssuancesAndRepurchases	-165700000	USD
CY2018	amg	Proceeds From Payments For Affiliate Equity Issuances And Repurchases ProceedsFromPaymentsForAffiliateEquityIssuancesAndRepurchases	-113700000	USD
CY2016	amg	Purchasesof Securitiesby Affiliate Sponsored Consolidated Products PurchasesofSecuritiesbyAffiliateSponsoredConsolidatedProducts	86200000	USD
CY2017	amg	Purchasesof Securitiesby Affiliate Sponsored Consolidated Products PurchasesofSecuritiesbyAffiliateSponsoredConsolidatedProducts	34100000	USD
CY2018	amg	Redeemable Noncontrolling Interest Change In Redemption Value RedeemableNoncontrollingInterestChangeInRedemptionValue	51600000	USD
CY2016	amg	Saleof Securitiesby Affiliate Sponsored Consolidated Products SaleofSecuritiesbyAffiliateSponsoredConsolidatedProducts	82800000	USD
CY2017	amg	Saleof Securitiesby Affiliate Sponsored Consolidated Products SaleofSecuritiesbyAffiliateSponsoredConsolidatedProducts	29900000	USD
CY2018	amg	Saleof Securitiesby Affiliate Sponsored Consolidated Products SaleofSecuritiesbyAffiliateSponsoredConsolidatedProducts	49600000	USD
CY2016	amg	Sharebased Compensationand Affiliate Equity Expense SharebasedCompensationandAffiliateEquityExpense	80400000	USD
CY2017	amg	Sharebased Compensationand Affiliate Equity Expense SharebasedCompensationandAffiliateEquityExpense	90400000	USD
CY2018	amg	Sharebased Compensationand Affiliate Equity Expense SharebasedCompensationandAffiliateEquityExpense	101100000	USD
CY2016	amg	Shares Received From Stock Options Exercised Value SharesReceivedFromStockOptionsExercisedValue	11200000	USD
CY2017	amg	Shares Received From Stock Options Exercised Value SharesReceivedFromStockOptionsExercisedValue	30200000	USD
CY2018	amg	Shares Received From Stock Options Exercised Value SharesReceivedFromStockOptionsExercisedValue	4100000	USD
CY2016	amg	Shares Receivedfor Tax Withholdingfor Share Based Compensation Value SharesReceivedforTaxWithholdingforShareBasedCompensationValue	9800000	USD
CY2017	amg	Shares Receivedfor Tax Withholdingfor Share Based Compensation Value SharesReceivedforTaxWithholdingforShareBasedCompensationValue	20000000	USD
CY2018	amg	Shares Receivedfor Tax Withholdingfor Share Based Compensation Value SharesReceivedforTaxWithholdingforShareBasedCompensationValue	14700000	USD
CY2016	amg	Stock Issued Under Other Incentive Plans StockIssuedUnderOtherIncentivePlans	17200000	USD
CY2017	amg	Stock Issued Under Other Incentive Plans StockIssuedUnderOtherIncentivePlans	59300000	USD
CY2018	amg	Stock Issued Under Other Incentive Plans StockIssuedUnderOtherIncentivePlans	4700000	USD
CY2016	amg	Subscriptionsto Affiliate Sponsored Consolidated Products Netof Redemptions SubscriptionstoAffiliateSponsoredConsolidatedProductsNetofRedemptions	9100000	USD
CY2017	amg	Subscriptionsto Affiliate Sponsored Consolidated Products Netof Redemptions SubscriptionstoAffiliateSponsoredConsolidatedProductsNetofRedemptions	2700000	USD
CY2018	amg	Subscriptionsto Affiliate Sponsored Consolidated Products Netof Redemptions SubscriptionstoAffiliateSponsoredConsolidatedProductsNetofRedemptions	132800000	USD
CY2017	amg	Tax Cuts And Jobs Actof2017 Incomplete Accounting Provisional Income Tax Expense Benefit TaxCutsAndJobsActof2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefit	-194100000	USD
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CY2017	amg	Tax Cutsand Jobs Actof2017 Changein Tax Rate Income Tax Expense Benefit TaxCutsandJobsActof2017ChangeinTaxRateIncomeTaxExpenseBenefit	-216900000	USD
CY2016	amg	Unrecognized Tax Benefits Increase Decrease Relatedto Foreign Exchange Rates UnrecognizedTaxBenefitsIncreaseDecreaseRelatedtoForeignExchangeRates	200000	USD
CY2017	amg	Unrecognized Tax Benefits Increase Decrease Relatedto Foreign Exchange Rates UnrecognizedTaxBenefitsIncreaseDecreaseRelatedtoForeignExchangeRates	400000	USD
CY2018	amg	Unrecognized Tax Benefits Increase Decrease Relatedto Foreign Exchange Rates UnrecognizedTaxBenefitsIncreaseDecreaseRelatedtoForeignExchangeRates	-500000	USD
CY2018	dei	Amendment Flag AmendmentFlag	false
CY2018	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2018	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2018	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2018	dei	Document Period End Date DocumentPeriodEndDate	2018-12-31
CY2018	dei	Document Type DocumentType	10-K
CY2018	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2018Q2	dei	Entity Public Float EntityPublicFloat	7886822780	USD
CY2018	dei	Entity Central Index Key EntityCentralIndexKey	0001004434
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CY2018	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2018	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2018	dei	Entity Registrant Name EntityRegistrantName	AFFILIATED MANAGERS GROUP, INC.
CY2018	dei	Entity Shell Company EntityShellCompany	false
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CY2018	dei	Entity Small Business EntitySmallBusiness	false
CY2018	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2018	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
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CY2018Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	400600000	USD
CY2017Q4	us-gaap	Accrued Income Taxes AccruedIncomeTaxes	93000000	USD
CY2018Q4	us-gaap	Accrued Income Taxes AccruedIncomeTaxes	42900000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	136300000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	146400000	USD
CY2018Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	835600000	USD
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CY2016	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	39200000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	40400000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	44700000	USD
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CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	44700000	USD
CY2018	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2017Q4	us-gaap	Assets Assets	8702100000	USD
CY2018Q4	us-gaap	Assets Assets	8219100000	USD
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CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	430800000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	439500000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	565500000	USD
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CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	8700000	USD
CY2018	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	129200000	USD
CY2016	us-gaap	Cash Divested From Deconsolidation CashDivestedFromDeconsolidation	2100000	USD
CY2017	us-gaap	Cash Divested From Deconsolidation CashDivestedFromDeconsolidation	0	USD
CY2018	us-gaap	Cash Divested From Deconsolidation CashDivestedFromDeconsolidation	3200000	USD
CY2017Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
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CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.20
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	153000000	shares
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	153000000	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	58500000	shares
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	58500000	shares
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	600000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	600000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	368000000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	109000000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	52200000	USD
CY2016	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	50000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	790600000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	156400000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	220600000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	337600000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	273700000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	588600000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1128200000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	430100000	USD
CY2017Q4	us-gaap	Convertible Debt ConvertibleDebt	304400000	USD
CY2018Q4	us-gaap	Convertible Debt ConvertibleDebt	307400000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	103400000	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	54100000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	48600000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	176300000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	182000000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	129400000	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	22900000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	18900000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	28600000	USD
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	62300000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-124900000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	51300000	USD
CY2016	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-13000000	USD
CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-9100000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-12600000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	59300000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-123600000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	51900000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	499500000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	565200000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	467400000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	511600000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	10000000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	10400000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	13200000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	0	USD
CY2018Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	8800000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	56200000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	77700000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	32100000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	53600000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	16300000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	16700000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	16800000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	18200000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	0	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1500000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	10400000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	18000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	1300000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	3600000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	24100000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	24100000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	258600000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	337100000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	6300000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	2600000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Tax Deferred Income DeferredTaxLiabilitiesTaxDeferredIncome	5900000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Tax Deferred Income DeferredTaxLiabilitiesTaxDeferredIncome	0	USD
CY2016	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	18900000	USD
CY2017	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	20100000	USD
CY2018	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	20800000	USD
CY2017	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	45400000	USD
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	65300000	USD
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	8.73
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	12.30
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.55
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	8.57
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.13
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.22
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.22
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.50
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	12.03
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.77
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.16
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.34
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-2.88
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.52
CY2016	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-49900000	USD
CY2017	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	14200000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-10100000	USD
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.003
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.252
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.000
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CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Impairment Losses EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses	0.000
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Impairment Losses EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses	0.130
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.004
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.003
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.020
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings	0.046
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings	0.054
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings	-0.013
CY2016	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.029
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.027
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.037
CY2017Q4	us-gaap	Employee Related Liabilities Current And Noncurrent EmployeeRelatedLiabilitiesCurrentAndNoncurrent	472500000	USD
CY2018Q4	us-gaap	Employee Related Liabilities Current And Noncurrent EmployeeRelatedLiabilitiesCurrentAndNoncurrent	463200000	USD
CY2017Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	63500000	USD
CY2018Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	54100000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y
CY2016	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	15100000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	13600000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	11200000	USD
CY2016	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	346400000	USD
CY2017	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	429800000	USD
CY2018	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	466300000	USD
CY2017	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	93100000	USD
CY2018	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	240000000	USD
CY2017Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Assets EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets	3324900000	USD
CY2018Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Assets EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets	2730400000	USD
CY2017Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Liabilities EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities	1405500000	USD
CY2018Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Liabilities EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities	1235100000	USD
CY2016	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	1068900000	USD
CY2017	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	2182700000	USD
CY2018	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	1286100000	USD
CY2016	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	2200900000	USD
CY2017	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	3126300000	USD
CY2018	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	3231700000	USD
CY2017Q4	us-gaap	Equity Method Investments EquityMethodInvestments	539000000	USD
CY2018Q4	us-gaap	Equity Method Investments EquityMethodInvestments	513200000	USD
CY2017	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	10900000	USD
CY2018	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	700000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	2628100000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	2662500000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	2633400000	USD
CY2017	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	34400000	USD
CY2018	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-29100000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	756500000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	688100000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	637300000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	974600000	USD
CY2017Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	253300000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	266900000	USD
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	282900000	USD
CY2017Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	264000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1067100000	USD
CY2018Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	287500000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	239300000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	250400000	USD
CY2018Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-63600000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	713600000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	286500000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	310600000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	76300000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	974600000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1067100000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	713600000	USD
CY2016	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	328800000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	302200000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-200000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	235600000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	58400000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	181300000	USD
CY2016	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	152300000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	165000000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	160200000	USD
CY2016	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	20300000	USD
CY2017	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	52300000	USD
CY2018	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	-6800000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	6100000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	7700000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	11700000	USD
CY2016	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-29600000	USD
CY2017	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	53500000	USD
CY2018	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-14400000	USD
CY2016	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	2200000	shares
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CY2018	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	0	shares
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	600000	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	400000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	200000	shares
CY2017Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	1449700000	USD
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	1309900000	USD
CY2016	us-gaap	Interest Expense InterestExpense	91700000	USD
CY2016	us-gaap	Interest Paid Net InterestPaidNet	85000000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	82100000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	76900000	USD
CY2017Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	3304700000	USD
CY2018Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	2791000000	USD
CY2016	us-gaap	Labor And Related Expense LaborAndRelatedExpense	932400000	USD
CY2017	us-gaap	Labor And Related Expense LaborAndRelatedExpense	979000000	USD
CY2018	us-gaap	Labor And Related Expense LaborAndRelatedExpense	987200000	USD
CY2017	us-gaap	Interest Expense InterestExpense	87800000	USD
CY2018	us-gaap	Interest Expense InterestExpense	80600000	USD
CY2016	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	15500000	USD
CY2017	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	15500000	USD
CY2018	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	0	USD
CY2017Q4	us-gaap	Liabilities Liabilities	3311700000	USD
CY2018Q4	us-gaap	Liabilities Liabilities	3250500000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	8702100000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	8219100000	USD
CY2017Q4	us-gaap	Long Term Debt LongTermDebt	809000000	USD
CY2018Q4	us-gaap	Long Term Debt LongTermDebt	779700000	USD
CY2017Q4	us-gaap	Marketable Securities MarketableSecurities	77800000	USD
CY2018Q4	us-gaap	Marketable Securities MarketableSecurities	119300000	USD
CY2017	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	35800000	USD
CY2018	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	6900000	USD
CY2016	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	354100000	USD
CY2017	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	352200000	USD
CY2018	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	370500000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	200900000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1189700000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-983100000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1332200000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	13800000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-18200000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1050300000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1170400000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1140600000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	472800000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	122500000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	126300000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	125400000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	315400000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	689500000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	153000000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	117000000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	124900000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	-151300000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	243600000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	488300000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	705000000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	243600000	USD
CY2016	us-gaap	Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Redeemable NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable	266200000	USD
CY2017	us-gaap	Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Redeemable NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable	319200000	USD
CY2018	us-gaap	Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Redeemable NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable	288700000	USD
CY2016	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	11900000	USD
CY2017	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	3100000	USD
CY2018	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	7500000	USD
CY2018	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	1	segment
CY2016	us-gaap	Operating Expenses OperatingExpenses	1595200000	USD
CY2017	us-gaap	Operating Expenses OperatingExpenses	1604600000	USD
CY2018	us-gaap	Operating Expenses OperatingExpenses	1692000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	35500000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	23400000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	27700000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	34800000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	36900000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	75200000	USD
CY2016	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	35500000	USD
CY2017	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	37500000	USD
CY2018	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	40500000	USD
CY2017Q4	us-gaap	Other Accrued Liabilities Current And Noncurrent OtherAccruedLiabilitiesCurrentAndNoncurrent	241700000	USD
CY2018Q4	us-gaap	Other Accrued Liabilities Current And Noncurrent OtherAccruedLiabilitiesCurrentAndNoncurrent	240500000	USD
CY2017Q4	us-gaap	Other Assets OtherAssets	58100000	USD
CY2018Q4	us-gaap	Other Assets OtherAssets	94000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-35200000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-7700000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	USD
CY2016	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-173300000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	112300000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-87100000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Derivative Excluded Component Increase Decrease After Adjustments And Tax OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAfterAdjustmentsAndTax	100000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Derivative Excluded Component Increase Decrease After Adjustments And Tax OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAfterAdjustmentsAndTax	-800000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Derivative Excluded Component Increase Decrease After Adjustments And Tax OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAfterAdjustmentsAndTax	-100000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-115300000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	128000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-102100000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-150400000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	119500000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-102200000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-22900000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-7200000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	15100000	USD
CY2016	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	43300000	USD
CY2017	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	58000000	USD
CY2018	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	69700000	USD
CY2017Q4	us-gaap	Other Investments OtherInvestments	165000000	USD
CY2018Q4	us-gaap	Other Investments OtherInvestments	201100000	USD
CY2017Q4	us-gaap	Other Liabilities OtherLiabilities	182400000	USD
CY2018Q4	us-gaap	Other Liabilities OtherLiabilities	162700000	USD
CY2017Q4	us-gaap	Other Minority Interests OtherMinorityInterests	756300000	USD
CY2018Q4	us-gaap	Other Minority Interests OtherMinorityInterests	677500000	USD
CY2016	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	16100000	USD
CY2017	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	26300000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	2700000	USD
CY2016	us-gaap	Payments For Proceeds From Investments PaymentsForProceedsFromInvestments	-65300000	USD
CY2017	us-gaap	Payments For Proceeds From Investments PaymentsForProceedsFromInvestments	-100100000	USD
CY2018	us-gaap	Payments For Proceeds From Investments PaymentsForProceedsFromInvestments	-48600000	USD
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	33400000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	393200000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	505800000	USD
CY2017	us-gaap	Payments For Repurchase Of Redeemable Noncontrolling Interest PaymentsForRepurchaseOfRedeemableNoncontrollingInterest	76800000	USD
CY2018	us-gaap	Payments For Repurchase Of Redeemable Noncontrolling Interest PaymentsForRepurchaseOfRedeemableNoncontrollingInterest	44800000	USD
CY2016	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	0	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	44900000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	64400000	USD
CY2016	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	354100000	USD
CY2017	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	352200000	USD
CY2018	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	370500000	USD
CY2016	us-gaap	Payments To Acquire Businesses And Interest In Affiliates PaymentsToAcquireBusinessesAndInterestInAffiliates	115800000	USD
CY2017	us-gaap	Payments To Acquire Businesses And Interest In Affiliates PaymentsToAcquireBusinessesAndInterestInAffiliates	174700000	USD
CY2018	us-gaap	Payments To Acquire Businesses And Interest In Affiliates PaymentsToAcquireBusinessesAndInterestInAffiliates	120000000	USD
CY2016	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	1361300000	USD
CY2017	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	30600000	USD
CY2018	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	7300000	USD
CY2016	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	16000000	USD
CY2017	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	37200000	USD
CY2018	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	40800000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	20200000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	18500000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	18700000	USD
CY2016	us-gaap	Proceeds From Divestiture Of Businesses And Interests In Affiliates ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates	11800000	USD
CY2017	us-gaap	Proceeds From Divestiture Of Businesses And Interests In Affiliates ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates	9000000	USD
CY2018	us-gaap	Proceeds From Divestiture Of Businesses And Interests In Affiliates ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates	6300000	USD
CY2016	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	465800000	USD
CY2017	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	41900000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	9700000	USD
CY2016	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1350000000	USD
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	545000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1150000000	USD
CY2016	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-7500000	USD
CY2017	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-18300000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-40600000	USD
CY2017	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	112200000	USD
CY2018	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	81400000	USD
CY2016	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	25600000	USD
CY2017	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	41900000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	9700000	USD
CY2016	us-gaap	Profit Loss ProfitLoss	739000000	USD
CY2017Q1	us-gaap	Profit Loss ProfitLoss	193700000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	110100000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	111000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	104300000	USD
CY2016Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	673500000	USD
CY2017Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	811900000	USD
CY2018Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	833700000	USD
CY2017Q2	us-gaap	Profit Loss ProfitLoss	204400000	USD
CY2017Q3	us-gaap	Profit Loss ProfitLoss	216800000	USD
CY2017Q4	us-gaap	Profit Loss ProfitLoss	393800000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	1008700000	USD
CY2018Q1	us-gaap	Profit Loss ProfitLoss	224000000	USD
CY2018Q2	us-gaap	Profit Loss ProfitLoss	205200000	USD
CY2018Q3	us-gaap	Profit Loss ProfitLoss	201900000	USD
CY2018Q4	us-gaap	Profit Loss ProfitLoss	-98800000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	532300000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	247300000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	250700000	USD
CY2016	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1125000000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	805000000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1180600000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	3698500000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	3876800000	USD
CY2018Q4	us-gaap	Retained Earnings Undistributed Earnings From Equity Method Investees RetainedEarningsUndistributedEarningsFromEquityMethodInvestees	92400000	USD
CY2016	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2194600000	USD
CY2017Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	544300000	USD
CY2017Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	570900000	USD
CY2017Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	585700000	USD
CY2017Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	604100000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2305000000	USD
CY2018Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	612500000	USD
CY2018Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	600200000	USD
CY2018Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	601300000	USD
CY2018Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	564400000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2378400000	USD
CY2016	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	398100000	USD
CY2017	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	373100000	USD
CY2018	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	417700000	USD
CY2017Q4	us-gaap	Senior Notes SeniorNotes	741300000	USD
CY2018Q4	us-gaap	Senior Notes SeniorNotes	742500000	USD
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	20700000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	59400000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	5900000	USD
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	100000	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	138.97
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	27700000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	50800000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	8200000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	0	shares
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	0	shares
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	39.02
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	48.05
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	48.64
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	600000	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	500000	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	122.04
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	130.81
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	99.57
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	122.40
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	179.54
CY2018Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	300000	USD
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P2Y3M18D
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P3Y8M12D
CY2016	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	16400000	USD
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	800000	USD
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	1000000	USD
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	100000	shares
CY2016	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	440300000	USD
CY2016	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	15500000	USD
CY2017	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	21000000	USD
CY2018	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-5000000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	3822200000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	3457400000	USD
CY2017Q4	us-gaap	Stockholders Equity Before Treasury Stock StockholdersEquityBeforeTreasuryStock	4485900000	USD
CY2018Q4	us-gaap	Stockholders Equity Before Treasury Stock StockholdersEquityBeforeTreasuryStock	4604000000	USD
CY2015Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3769100000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4426500000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4578500000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4134900000	USD
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	3400000	shares
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	6500000	shares
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	663700000	USD
CY2018Q4	us-gaap	Treasury Stock Value TreasuryStockValue	1146600000	USD
CY2016	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	33400000	USD
CY2017	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	416300000	USD
CY2018	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	489500000	USD
CY2018Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	225400000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	26900000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	26800000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	32400000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	1300000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	33100000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	2000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	32400000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	33100000	USD
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	57000000	shares
CY2016Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	1400000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	1700000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	2100000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	3800000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	6000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	2400000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	600000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1500000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	8400000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	4700000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	2300000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	6300000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	26000000	USD
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	58600000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	53800000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	54200000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	56000000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	53600000	shares
CY2018	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Concentration of Credit Risk</font></div><div style="line-height:120%;padding-left:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Financial 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.</font></div></div>
CY2018	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:10px;padding-top:10px;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">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.</font></div></div>

Files In Submission

Name	View Source	Status
0001004434-19-000008-index-headers.html	Edgar Link	pending
0001004434-19-000008-index.html	Edgar Link	pending
0001004434-19-000008.txt	Edgar Link	pending
0001004434-19-000008-xbrl.zip	Edgar Link	pending
amg-20181231.xml	Edgar Link	completed
amg-20181231.xsd	Edgar Link	pending
amg-20181231_cal.xml	Edgar Link	unprocessable
amg-20181231_def.xml	Edgar Link	unprocessable
amg-20181231_lab.xml	Edgar Link	unprocessable
amg-20181231_pre.xml	Edgar Link	unprocessable
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amg_10-kx12312018.htm	Edgar Link	pending
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$AMG
AFFILIATED MANAGERS GROUP, INC. Stock $amg

2018 Form 10-K Financial Statement

#000100443419000008 Filed on February 22, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMG AFFILIATED MANAGERS GROUP, INC. Stock $amg

2018 Form 10-K Financial Statement

#000100443419000008 Filed on February 22, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMG
AFFILIATED MANAGERS GROUP, INC. Stock $amg