$JHG
Janus Henderson Group PLC Stock $jhg

$jhg Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000155837021001617 Filed on February 24, 2021

Income Statement

Concept	2020 Q4	2019 Q4	2019 Q3
Revenue	$657.2M	$601.2M	$536.0M
YoY Change	9.31%	10.29%	-7.78%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin	$373.9M	$385.3M	$175.9M
YoY Change	-2.96%	11.68%	-1.9%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$11.60M	$17.10M	$15.20M
YoY Change	-32.16%	-3.93%	-26.92%
% of Gross Profit
Operating Expenses	$430.2M	$457.7M	$175.9M
YoY Change	-6.01%	16.37%	-1.9%
Operating Profit	$227.0M	$154.3M	$143.6M
YoY Change	47.12%	2.87%	-3.17%
Interest Expense	$29.00M	$8.800M	$3.500M
YoY Change	229.55%	-145.6%	-12.5%
% of Operating Profit	12.78%	5.7%	2.44%
Other Income/Expense, Net	-$200.0K	-$5.800M	$4.700M
YoY Change	-96.55%	-142.96%	104.35%
Pretax Income	$255.8M	$157.3M	$148.8M
YoY Change	62.62%	9.08%	7.59%
Income Tax	$57.40M	$36.90M	$35.70M
% Of Pretax Income	22.44%	23.46%	23.99%
Net Earnings	$198.4M	$120.4M	$113.1M
YoY Change	64.78%	19.44%	7.61%
Net Earnings / Revenue	30.19%	20.03%	21.1%
Basic Earnings Per Share	$1.03	$0.59	$0.58
Diluted Earnings Per Share	$1.02	$0.59	$0.58
COMMON SHARES
Basic Shares Outstanding	181.4M	187.5M	187.9M
Diluted Shares Outstanding			188.3M

Balance Sheet

Concept	2020 Q4	2019 Q4	2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.591B	$1.975B	$1.358B
YoY Change	-19.45%	32.44%	-3.72%
Cash & Equivalents	$1.108B	$796.5M	$773.7M
Short-Term Investments	$482.7M	$1.178B	$584.2M
Other Short-Term Assets	$111.1M	$116.0M	$96.70M
YoY Change	-4.22%	67.15%	23.34%
Inventory
Prepaid Expenses	$35.10M	$27.40M
Receivables	$114.7M	$131.7M	$261.5M
Other Receivables	$373.6M	$334.8M	$303.2M
Total Short-Term Assets	$2.194B	$2.581B	$2.026B
YoY Change	-15.0%	27.82%	1.5%
LONG-TERM ASSETS
Property, Plant & Equipment	$77.90M	$84.70M	$74.40M
YoY Change	-8.03%	21.87%	14.46%
Goodwill	$1.384B	$1.504B	$1.455B
YoY Change	-8.0%	1.78%	-2.7%
Intangibles	$2.686B	$3.089B	$3.064B
YoY Change	-13.03%	-1.11%	-2.62%
Long-Term Investments
YoY Change
Other Assets	$157.7M	$149.3M	$142.2M
YoY Change	5.63%	863.23%	-35.6%
Total Long-Term Assets	$4.497B	$5.041B	$4.940B
YoY Change	-10.79%	3.03%	0.25%
TOTAL ASSETS
Total Short-Term Assets	$2.194B	$2.581B	$2.026B
Total Long-Term Assets	$4.497B	$5.041B	$4.940B
Total Assets	$6.691B	$7.622B	$6.966B
YoY Change	-12.21%	10.27%	0.61%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$235.3M	$277.4M	$228.0M
YoY Change	-15.18%	15.73%	-3.35%
Accrued Expenses	$371.0M	$360.6M	$279.4M
YoY Change	2.88%	4.4%	-2.68%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due		$800.0K	$1.000M
YoY Change
Total Short-Term Liabilities	$727.8M	$769.7M	$768.6M
YoY Change	-5.44%	5.67%	11.44%
LONG-TERM LIABILITIES
Long-Term Debt	$313.3M	$316.2M	$316.9M
YoY Change	-0.92%	-0.91%	-0.91%
Other Long-Term Liabilities	$144.3M	$158.8M	$148.1M
YoY Change	-9.13%	100.51%	12.62%
Total Long-Term Liabilities	$457.6M	$475.0M	$465.0M
YoY Change	-3.66%	19.26%	3.04%
TOTAL LIABILITIES
Total Short-Term Liabilities	$727.8M	$769.7M	$768.6M
Total Long-Term Liabilities	$457.6M	$475.0M	$465.0M
Total Liabilities	$1.871B	$2.038B	$2.005B
YoY Change	-8.17%	6.4%	-2.27%
SHAREHOLDERS EQUITY
Retained Earnings	$1.062B	$1.284B	$1.250B
YoY Change	-17.29%	-2.31%
Common Stock	$270.6M	$280.5M	$281.2M
YoY Change	-3.53%	-4.79%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$107.3M	$139.5M	$144.1M
YoY Change	-23.08%	-18.33%
Treasury Stock Shares	$2.548M	$3.546M	$3.733M
Shareholders Equity	$4.716B	$4.887B	$4.722B
YoY Change
Total Liabilities & Shareholders Equity	$6.691B	$7.622B	$6.966B
YoY Change	-12.21%	10.27%	0.61%

Cashflow Statement

Concept	2020 Q4	2019 Q4	2019 Q3
OPERATING ACTIVITIES
Net Income	$198.4M	$120.4M	$113.1M
YoY Change	64.78%	19.44%	7.61%
Depreciation, Depletion And Amortization	$11.60M	$17.10M	$15.20M
YoY Change	-32.16%	-3.93%	-26.92%
Cash From Operating Activities	$220.2M	$207.0M	$173.2M
YoY Change	6.38%	-14.92%	-29.76%
INVESTING ACTIVITIES
Capital Expenditures	-$1.300M	-$14.60M	-$8.400M
YoY Change	-91.1%	26.96%	33.33%
Acquisitions
YoY Change
Other Investing Activities	$120.7M	-$350.1M	-$27.70M
YoY Change	-134.48%	-1528.98%	-172.51%
Cash From Investing Activities	$119.4M	-$364.7M	-$36.10M
YoY Change	-132.74%	-2905.38%	-213.17%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-191.2M	176.0M	-107.5M
YoY Change	-208.64%	-237.72%	-41.06%
NET CHANGE
Cash From Operating Activities	220.2M	207.0M	173.2M
Cash From Investing Activities	119.4M	-364.7M	-36.10M
Cash From Financing Activities	-191.2M	176.0M	-107.5M
Net Change In Cash	148.4M	18.30M	29.60M
YoY Change	710.93%	-85.76%	-69.2%
FREE CASH FLOW
Cash From Operating Activities	$220.2M	$207.0M	$173.2M
Capital Expenditures	-$1.300M	-$14.60M	-$8.400M
Free Cash Flow	$221.5M	$221.6M	$181.6M
YoY Change	-0.05%	-13.03%	-28.19%

Facts In Submission

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CY2020	dei	Entity File Number EntityFileNumber	001-38103
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CY2020	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	71800000
CY2019	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	74700000
CY2018	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-124300000
CY2020	jhg	Other Comprehensive Income Actuarial Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeActuarialGainLossArisingDuringPeriodNetOfTax	-29500000
CY2019	jhg	Other Comprehensive Income Actuarial Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeActuarialGainLossArisingDuringPeriodNetOfTax	-5600000
CY2018	jhg	Other Comprehensive Income Actuarial Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeActuarialGainLossArisingDuringPeriodNetOfTax	3700000
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	42300000
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	69100000
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-120600000
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	-800000
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	12700000
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest	-1400000
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	43100000
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	56400000
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-119200000
CY2020	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	224900000
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	514800000
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	379000000.0
CY2020	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	20200000
CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	30800000
CY2018	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-25600000
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	204700000
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	484000000.0
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	404600000
CY2020	us-gaap	Profit Loss ProfitLoss	182600000
CY2019	us-gaap	Profit Loss ProfitLoss	445700000
CY2018	us-gaap	Profit Loss ProfitLoss	499600000
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	49200000
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	62600000
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	62600000
CY2020	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	513700000
CY2019	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	18000000.0
CY2018	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	7200000
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-104800000
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-4700000
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-10500000
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	66700000
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	74200000
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	82400000
CY2020	jhg	Right Of Use Operating Lease Impairment Loss RightOfUseOperatingLeaseImpairmentLoss	1300000
CY2019	jhg	Right Of Use Operating Lease Impairment Loss RightOfUseOperatingLeaseImpairmentLoss	4700000
CY2020	us-gaap	Disposal Group Not Discontinued Operation Gain Loss On Disposal DisposalGroupNotDiscontinuedOperationGainLossOnDisposal	16200000
CY2020	jhg	Gain Loss On Investments Net GainLossOnInvestmentsNet	57500000
CY2019	jhg	Gain Loss On Investments Net GainLossOnInvestmentsNet	34200000
CY2018	jhg	Gain Loss On Investments Net GainLossOnInvestmentsNet	-40900000
CY2020	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	-7100000
CY2019	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	-20000000.0
CY2020	jhg	Pension Contributions In Excess Of Pension Costs Recognized PensionContributionsInExcessOfPensionCostsRecognized	4600000
CY2019	jhg	Pension Contributions In Excess Of Pension Costs Recognized PensionContributionsInExcessOfPensionCostsRecognized	-1000000.0
CY2018	jhg	Pension Contributions In Excess Of Pension Costs Recognized PensionContributionsInExcessOfPensionCostsRecognized	16100000
CY2018	jhg	Gain From Bnp Paribas Transaction GainFromBnpParibasTransaction	22300000
CY2018	jhg	Dai Ichi Option Fair Value Adjustment DaiIchiOptionFairValueAdjustment	-26800000
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	20500000
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	11100000
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-4800000
CY2020	jhg	Increase Decrease In Oeic And Unit Trust Receivables And Payables IncreaseDecreaseInOEICAndUnitTrustReceivablesAndPayables	-7600000
CY2019	jhg	Increase Decrease In Oeic And Unit Trust Receivables And Payables IncreaseDecreaseInOEICAndUnitTrustReceivablesAndPayables	-400000
CY2018	jhg	Increase Decrease In Oeic And Unit Trust Receivables And Payables IncreaseDecreaseInOEICAndUnitTrustReceivablesAndPayables	-3900000
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	53400000
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	16400000
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-134500000
CY2020	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	88700000
CY2019	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	-57000000.0
CY2018	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	-89400000
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	645700000
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	463200000
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	670800000
CY2020	jhg	Purchases Settlements And Maturities Of Marketable Securities And Derivatives PurchasesSettlementsAndMaturitiesOfMarketableSecuritiesAndDerivatives	-134800000
CY2019	jhg	Purchases Settlements And Maturities Of Marketable Securities And Derivatives PurchasesSettlementsAndMaturitiesOfMarketableSecuritiesAndDerivatives	-1500000
CY2018	jhg	Purchases Settlements And Maturities Of Marketable Securities And Derivatives PurchasesSettlementsAndMaturitiesOfMarketableSecuritiesAndDerivatives	-35100000
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	17800000
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	37800000
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	29100000
CY2018	jhg	Proceeds From Bnp Transaction Net ProceedsFromBnpTransactionNet	36500000
CY2020	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	11600000
CY2019	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	34900000
CY2018	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	-16000000.0
CY2020	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	400000
CY2019	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	400000
CY2020	jhg	Proceeds From Sale Of Volantis Contingent Consideration ProceedsFromSaleOfVolantisContingentConsideration	2200000
CY2019	jhg	Proceeds From Sale Of Volantis Contingent Consideration ProceedsFromSaleOfVolantisContingentConsideration	2300000
CY2018	jhg	Proceeds From Sale Of Volantis Contingent Consideration ProceedsFromSaleOfVolantisContingentConsideration	5900000
CY2020	jhg	Proceeds From Sale Of Geneva Contingent Consideration ProceedsFromSaleOfGenevaContingentConsideration	3200000
CY2020	jhg	Proceeds From Geneva ProceedsFromGeneva	38400000
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	129400000
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-389300000
CY2018	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	8600000
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	100900000
CY2020	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	1000000.0
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1108100000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	796500000
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	916600000
CY2020	jhg	Payments For Repurchase Of Common Stock For Stock Based Compensation Plans PaymentsForRepurchaseOfCommonStockForStockBasedCompensationPlans	49100000
CY2019	jhg	Payments For Repurchase Of Common Stock For Stock Based Compensation Plans PaymentsForRepurchaseOfCommonStockForStockBasedCompensationPlans	39000000.0
CY2018	jhg	Payments For Repurchase Of Common Stock For Stock Based Compensation Plans PaymentsForRepurchaseOfCommonStockForStockBasedCompensationPlans	86600000
CY2020	jhg	Payments For Repurchase Of Common Stock For Share Buyback Program PaymentsForRepurchaseOfCommonStockForShareBuybackProgram	130800000
CY2019	jhg	Payments For Repurchase Of Common Stock For Share Buyback Program PaymentsForRepurchaseOfCommonStockForShareBuybackProgram	199900000
CY2018	jhg	Payments For Repurchase Of Common Stock For Share Buyback Program PaymentsForRepurchaseOfCommonStockForShareBuybackProgram	99800000
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	262900000
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	272400000
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	275100000
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	95300000
CY2020	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	13800000
CY2019	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	14100000
CY2018	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	22700000
CY2020	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	800000
CY2019	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	1300000
CY2018	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	8100000
CY2020	jhg	Proceeds From Third Party Investments In Seeded Investment Products Net Of Redemptions ProceedsFromThirdPartyInvestmentsInSeededInvestmentProductsNetOfRedemptions	-34000000.0
CY2019	jhg	Proceeds From Third Party Investments In Seeded Investment Products Net Of Redemptions ProceedsFromThirdPartyInvestmentsInSeededInvestmentProductsNetOfRedemptions	320800000
CY2018	jhg	Proceeds From Third Party Investments In Seeded Investment Products Net Of Redemptions ProceedsFromThirdPartyInvestmentsInSeededInvestmentProductsNetOfRedemptions	-36500000
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	600000
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1100000
CY2018	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1300000
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-491000000.0
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-207000000.0
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-616800000
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	27500000
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	13000000.0
CY2018	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	-32500000
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	311600000
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-120100000
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	122400000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	796500000
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	916600000
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	794200000
CY2020	us-gaap	Interest Paid Net InterestPaidNet	14600000
CY2019	us-gaap	Interest Paid Net InterestPaidNet	14600000
CY2018	us-gaap	Interest Paid Net InterestPaidNet	14800000
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	159000000.0
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	160000000.0
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	184700000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1108100000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	796500000
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	916600000
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4875700000
CY2018	jhg	Net Income Loss Excluding Redeemable Noncontrolling Interests NetIncomeLossExcludingRedeemableNoncontrollingInterests	514700000
CY2018	jhg	Other Comprehensive Income Loss Excluding Redeemable Noncontrolling Interest Net Of Tax OtherComprehensiveIncomeLossExcludingRedeemableNoncontrollingInterestNetOfTax	-119200000
CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.40
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	270200000
CY2018	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	99800000
CY2018	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	7600000
CY2018	jhg	Fair Value Adjustments To Redeemable Noncontrolling Interests FairValueAdjustmentsToRedeemableNoncontrollingInterests	800000
CY2018	jhg	Adjustments To Additional Paid In Capital Settlement Of Derivative Instruments AdjustmentsToAdditionalPaidInCapitalSettlementOfDerivativeInstruments	38000000.0
CY2018	jhg	Stock Repurchased For Stock Based Compensation Plan During Period Value StockRepurchasedForStockBasedCompensationPlanDuringPeriodValue	86600000
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	82400000
CY2018	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	8600000
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4860800000
CY2019	jhg	Net Income Loss Excluding Redeemable Noncontrolling Interests NetIncomeLossExcludingRedeemableNoncontrollingInterests	426500000
CY2019	jhg	Other Comprehensive Income Loss Excluding Redeemable Noncontrolling Interest Net Of Tax OtherComprehensiveIncomeLossExcludingRedeemableNoncontrollingInterestNetOfTax	56400000
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.44
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	272400000
CY2019	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	199900000
CY2019	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	700000
CY2019	jhg	Fair Value Adjustments To Redeemable Noncontrolling Interests FairValueAdjustmentsToRedeemableNoncontrollingInterests	300000
CY2019	jhg	Stock Repurchased For Stock Based Compensation Plan During Period Value StockRepurchasedForStockBasedCompensationPlanDuringPeriodValue	39000000.0
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	74200000
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4906200000
CY2020	jhg	Net Income Loss Excluding Redeemable Noncontrolling Interests NetIncomeLossExcludingRedeemableNoncontrollingInterests	160100000
CY2020	jhg	Other Comprehensive Income Loss Excluding Redeemable Noncontrolling Interest Net Of Tax OtherComprehensiveIncomeLossExcludingRedeemableNoncontrollingInterestNetOfTax	43100000
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.44
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	262900000
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	130800000
CY2020	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	800000
CY2020	jhg	Fair Value Adjustments To Redeemable Noncontrolling Interests FairValueAdjustmentsToRedeemableNoncontrollingInterests	300000
CY2020	jhg	Stock Repurchased For Stock Based Compensation Plan During Period Value StockRepurchasedForStockBasedCompensationPlanDuringPeriodValue	49100000
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	66700000
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	1000000.0
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4733800000
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 12pt 0pt;"><span style="font-style:italic;font-weight:bold;">Accounting Estimates</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 12pt 0pt;">The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the consolidated financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates and the differences could be material. Our significant estimates relate to investment securities, acquisition accounting, goodwill and intangible assets, retirement benefit assets and obligations, contingent consideration, equity compensation and income taxes.</p>
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	26000000.0
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	23500000
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	24700000
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	149700000
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	157200000
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	71800000
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	72500000
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	77900000
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	84700000
CY2018	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0
CY2019	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0
CY2020	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0
CY2020	jhg	Period Over Which Sales Commissions Can Be Deferred And Amortized Maximum PeriodOverWhichSalesCommissionsCanBeDeferredAndAmortizedMaximum	P4Y
CY2018	us-gaap	Deferred Compensation Arrangement With Individual Contributions By Employer DeferredCompensationArrangementWithIndividualContributionsByEmployer	0
CY2019	us-gaap	Deferred Compensation Arrangement With Individual Contributions By Employer DeferredCompensationArrangementWithIndividualContributionsByEmployer	0
CY2020	us-gaap	Deferred Compensation Arrangement With Individual Contributions By Employer DeferredCompensationArrangementWithIndividualContributionsByEmployer	0
CY2020	us-gaap	Number Of Reporting Units NumberOfReportingUnits	1
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1.50
CY2020	jhg	Gain Loss Recognized On Purchase Issue Sale Or Cancellation Of Own Equity Shares GainLossRecognizedOnPurchaseIssueSaleOrCancellationOfOwnEquityShares	0
CY2020Q4	us-gaap	Investment Owned At Fair Value InvestmentOwnedAtFairValue	482700000
CY2019Q4	us-gaap	Investment Owned At Fair Value InvestmentOwnedAtFairValue	1178300000
CY2020Q4	us-gaap	Derivative Assets DerivativeAssets	9100000
CY2020Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	10800000
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	3700000
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-1100000
CY2018	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-6800000
CY2020	jhg	Derivative Instruments Not Designated As Hedging Instruments Gains Losses Net Denominated In Foreign Currency DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainsLossesNetDenominatedInForeignCurrency	-3700000
CY2019	jhg	Derivative Instruments Not Designated As Hedging Instruments Gains Losses Net Denominated In Foreign Currency DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainsLossesNetDenominatedInForeignCurrency	1100000
CY2018	jhg	Derivative Instruments Not Designated As Hedging Instruments Gains Losses Net Denominated In Foreign Currency DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainsLossesNetDenominatedInForeignCurrency	6800000
CY2020Q4	us-gaap	Financial Instruments Sold Not Yet Purchased Derivatives And Other Contracts FinancialInstrumentsSoldNotYetPurchasedDerivativesAndOtherContracts	7900000
CY2020	us-gaap	Gain Loss On Investments GainLossOnInvestments	57500000
CY2019	us-gaap	Gain Loss On Investments GainLossOnInvestments	34200000
CY2018	us-gaap	Gain Loss On Investments GainLossOnInvestments	-40900000
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	147200000
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	12400000
CY2020	jhg	Accumulated Amortization Related To Disposals AccumulatedAmortizationRelatedToDisposals	-61400000
CY2020	jhg	Accumulated Amortization Related To Foreign Currency Translation Gain Loss AccumulatedAmortizationRelatedToForeignCurrencyTranslationGainLoss	-2500000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	100700000
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	3088600000
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	12400000
CY2020Q4	us-gaap	Disposal Group Including Discontinued Operation Intangible Assets DisposalGroupIncludingDiscontinuedOperationIntangibleAssets	17900000
CY2020	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	390200000
CY2020	jhg	Intangible Assets Translation Adjustments IntangibleAssetsTranslationAdjustments	18200000
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	2686300000
CY2019Q4	us-gaap	Goodwill Goodwill	1504300000
CY2020Q4	us-gaap	Disposal Group Including Discontinued Operation Goodwill1 DisposalGroupIncludingDiscontinuedOperationGoodwill1	23500000
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	123500000
CY2020	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-26600000
CY2020Q4	us-gaap	Goodwill Goodwill	1383900000
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	116300000
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	29300000
CY2019	jhg	Accumulated Amortization Related To Foreign Currency Translation Gain Loss AccumulatedAmortizationRelatedToForeignCurrencyTranslationGainLoss	1600000
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	147200000
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	3123300000
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	29300000
CY2019	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	18000000.0
CY2019	jhg	Intangible Assets Translation Adjustments IntangibleAssetsTranslationAdjustments	12600000
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	3088600000
CY2018Q4	us-gaap	Goodwill Goodwill	1478000000.0
CY2019	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-26300000
CY2019Q4	us-gaap	Goodwill Goodwill	1504300000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	7800000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	7800000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	7500000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	6000000.0
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	6000000.0
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	35100000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	70200000
CY2020Q2	jhg	Amount Of Fair Value Greater Than Less Than Carrying Value AmountOfFairValueGreaterThanLessThanCarryingValue	123500000
CY2020Q4	jhg	Amount Of Fair Value Greater Than Less Than Carrying Value AmountOfFairValueGreaterThanLessThanCarryingValue	400000000
CY2020	us-gaap	Lessee Operating Lease Existence Of Option To Extend LesseeOperatingLeaseExistenceOfOptionToExtend	true
CY2020	us-gaap	Lessee Finance Lease Existence Of Option To Extend LesseeFinanceLeaseExistenceOfOptionToExtend	true
CY2020	us-gaap	Lessee Finance Lease Existence Of Option To Terminate LesseeFinanceLeaseExistenceOfOptionToTerminate	true
CY2020	us-gaap	Lessee Operating Lease Existence Of Option To Terminate LesseeOperatingLeaseExistenceOfOptionToTerminate	true
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	121800000
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	132600000
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	26800000
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	24900000
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	117800000
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	129400000
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	144600000
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	154300000
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	14900000
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	13000000.0
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	12900000
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	12200000
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	2000000.0
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	800000
CY2020Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	500000
CY2019Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	800000
CY2020Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	1600000
CY2019Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	100000
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	2100000
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	900000
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	31200000
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	33700000
CY2020	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	900000
CY2019	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1100000
CY2020	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	100000
CY2020	jhg	Finance Lease Cost FinanceLeaseCost	1000000.0
CY2019	jhg	Finance Lease Cost FinanceLeaseCost	1100000
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	32400000
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	28900000
CY2020	jhg	Finance Lease Payments FinanceLeasePayments	700000
CY2019	jhg	Finance Lease Payments FinanceLeasePayments	1100000
CY2020	jhg	Right Of Use Asset Obtained In Exchange For Lease Liability RightOfUseAssetObtainedInExchangeForLeaseLiability	1200000
CY2019	jhg	Right Of Use Asset Obtained In Exchange For Lease Liability RightOfUseAssetObtainedInExchangeForLeaseLiability	19800000
CY2020	us-gaap	Sublease Income SubleaseIncome	3000000.0
CY2019	us-gaap	Sublease Income SubleaseIncome	7300000
CY2020	jhg	Lessee Operating Sublease Impairment Of Right Of Use Asset LesseeOperatingSubleaseImpairmentOfRightOfUseAsset	1400000
CY2019	jhg	Lessee Operating Sublease Impairment Of Right Of Use Asset LesseeOperatingSubleaseImpairmentOfRightOfUseAsset	5400000
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P74M
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P80M
CY2020Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P52M
CY2019Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P15M
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.042
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.046
CY2020Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.043
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.028
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	32300000
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	500000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	28300000
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	500000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	26000000.0
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	500000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	24700000
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	400000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	17300000
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	200000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	37000000.0
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	165600000
CY2020Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	2100000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	21000000.0
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	144600000
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	2100000
CY2020	jhg	Income Loss From Equity Method Investments Prior To Consolidation IncomeLossFromEquityMethodInvestmentsPriorToConsolidation	6000000.0
CY2019	jhg	Income Loss From Equity Method Investments Prior To Consolidation IncomeLossFromEquityMethodInvestmentsPriorToConsolidation	1500000
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	164300000
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	142500000
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	172700000
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-104800000
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-4700000
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-10500000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	59500000
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	137800000
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	162200000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	242100000
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	583500000
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	661800000
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	69700000
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	63000000.0
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	71000000.0
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	59900000
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	3400000
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	2800000
CY2020Q4	jhg	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Debt Premium DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDebtPremium	3800000
CY2019Q4	jhg	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Debt Premium DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDebtPremium	4600000
CY2020Q4	jhg	Deferred Tax Asset Lease Liabilities DeferredTaxAssetLeaseLiabilities	26000000.0
CY2019Q4	jhg	Deferred Tax Asset Lease Liabilities DeferredTaxAssetLeaseLiabilities	27100000
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	7500000
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	16900000
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	181400000
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	174300000
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	65100000
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	56100000
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	116300000
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	118200000
CY2020Q4	jhg	Deferred Tax Liabilities Retirement Benefits DeferredTaxLiabilitiesRetirementBenefits	28500000
CY2019Q4	jhg	Deferred Tax Liabilities Retirement Benefits DeferredTaxLiabilitiesRetirementBenefits	24900000
CY2020Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	677400000
CY2019Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	790000000.0
CY2020Q4	jhg	Deferred Tax Liabilities Lease Right Of Use Assets DeferredTaxLiabilitiesLeaseRightOfUseAssets	24300000
CY2019Q4	jhg	Deferred Tax Liabilities Lease Right Of Use Assets DeferredTaxLiabilitiesLeaseRightOfUseAssets	25800000
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	12800000
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	4800000
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	743000000.0
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	845500000
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	626700000
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	727300000
CY2020Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	627400000
CY2019Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	729100000
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	626700000
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	727300000
CY2020	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	9000000.0
CY2019Q4	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	53100000
CY2020Q4	us-gaap	Other Assets Current OtherAssetsCurrent	111100000
CY2019Q4	us-gaap	Other Assets Current OtherAssetsCurrent	116000000.0
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	157700000
CY2019Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	149300000
CY2018	jhg	Social Security Costs Share Based Award Plan SocialSecurityCostsShareBasedAwardPlan	9400000
CY2020	jhg	Stock Based Payment Expense Charged To Comprehensive Income StockBasedPaymentExpenseChargedToComprehensiveIncome	170100000
CY2019	jhg	Stock Based Payment Expense Charged To Comprehensive Income StockBasedPaymentExpenseChargedToComprehensiveIncome	184300000
CY2019Q4	jhg	Unrecognized Tax Benefits Including Interest UnrecognizedTaxBenefitsIncludingInterest	14100000
CY2018Q4	jhg	Unrecognized Tax Benefits Including Interest UnrecognizedTaxBenefitsIncludingInterest	12400000
CY2017Q4	jhg	Unrecognized Tax Benefits Including Interest UnrecognizedTaxBenefitsIncludingInterest	10200000
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	2200000
CY2020	jhg	Unrecognized Tax Benefits Increase Decrease Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreaseDecreaseResultingFromPriorPeriodTaxPositions	3500000
CY2019	jhg	Unrecognized Tax Benefits Increase Decrease Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreaseDecreaseResultingFromPriorPeriodTaxPositions	3500000
CY2018	jhg	Unrecognized Tax Benefits Increase Decrease Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreaseDecreaseResultingFromPriorPeriodTaxPositions	1400000
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	500000
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	1900000
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	1900000
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	700000
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Foreign Currency Translation UnrecognizedTaxBenefitsIncreasesResultingFromForeignCurrencyTranslation	100000
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Foreign Currency Translation UnrecognizedTaxBenefitsIncreasesResultingFromForeignCurrencyTranslation	100000
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Foreign Currency Translation UnrecognizedTaxBenefitsDecreasesResultingFromForeignCurrencyTranslation	200000
CY2020Q4	jhg	Unrecognized Tax Benefits Including Interest UnrecognizedTaxBenefitsIncludingInterest	15800000
CY2019Q4	jhg	Unrecognized Tax Benefits Including Interest UnrecognizedTaxBenefitsIncludingInterest	14100000
CY2018Q4	jhg	Unrecognized Tax Benefits Including Interest UnrecognizedTaxBenefitsIncludingInterest	12400000
CY2020Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	2100000
CY2019Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	1700000
CY2018Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	1500000
CY2020Q4	us-gaap	Decrease In Unrecognized Tax Benefits Is Reasonably Possible DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	1600000
CY2020Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	35100000
CY2019Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	27400000
CY2020Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	2100000
CY2019Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	9500000
CY2020Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	9100000
CY2019Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	26000000.0
CY2020Q4	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	64800000
CY2020Q4	jhg	Lease Liability Noncurrent LeaseLiabilityNoncurrent	117900000
CY2019Q4	jhg	Lease Liability Noncurrent LeaseLiabilityNoncurrent	129500000
CY2020Q4	us-gaap	Other Sundry Liabilities Noncurrent OtherSundryLiabilitiesNoncurrent	10300000
CY2019Q4	us-gaap	Other Sundry Liabilities Noncurrent OtherSundryLiabilitiesNoncurrent	7500000
CY2020Q4	us-gaap	Accrued Sales Commission Current AccruedSalesCommissionCurrent	40600000
CY2019Q4	us-gaap	Accrued Sales Commission Current AccruedSalesCommissionCurrent	50800000
CY2020Q4	jhg	Accrued Rebates Current AccruedRebatesCurrent	37200000
CY2019Q4	jhg	Accrued Rebates Current AccruedRebatesCurrent	28500000
CY2020Q4	jhg	Other Miscellaneous Accrued Liabilities Current OtherMiscellaneousAccruedLiabilitiesCurrent	53400000
CY2019Q4	jhg	Other Miscellaneous Accrued Liabilities Current OtherMiscellaneousAccruedLiabilitiesCurrent	52500000
CY2020Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	131200000
CY2019Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	131800000
CY2020Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	19800000
CY2019Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	12600000
CY2020Q4	jhg	Lease Liability Current LeaseLiabilityCurrent	27300000
CY2019Q4	jhg	Lease Liability Current LeaseLiabilityCurrent	25700000
CY2019Q4	us-gaap	Business Combination Contingent Consideration Liability Current BusinessCombinationContingentConsiderationLiabilityCurrent	14300000
CY2020Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	18700000
CY2019Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	35300000
CY2020Q4	us-gaap	Other Sundry Liabilities Current OtherSundryLiabilitiesCurrent	35100000
CY2019Q4	us-gaap	Other Sundry Liabilities Current OtherSundryLiabilitiesCurrent	26300000
CY2020Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	232100000
CY2019Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	246000000.0
CY2020Q4	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	16100000
CY2019Q4	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	14900000
CY2019Q4	us-gaap	Business Combination Contingent Consideration Liability Noncurrent BusinessCombinationContingentConsiderationLiabilityNoncurrent	6900000
CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	144300000
CY2019Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	158800000
CY2018	jhg	Mutual Fund Share Awards Liability Settled Of Share Based Award Plan MutualFundShareAwardsLiabilitySettledOfShareBasedAwardPlan	24300000
CY2020	jhg	Profits Interests And Other Share Based Award Plan ProfitsInterestsAndOtherShareBasedAwardPlan	900000
CY2019	jhg	Profits Interests And Other Share Based Award Plan ProfitsInterestsAndOtherShareBasedAwardPlan	-3900000
CY2018	jhg	Profits Interests And Other Share Based Award Plan ProfitsInterestsAndOtherShareBasedAwardPlan	18400000
CY2020	jhg	Social Security Costs Share Based Award Plan SocialSecurityCostsShareBasedAwardPlan	11400000
CY2019	jhg	Social Security Costs Share Based Award Plan SocialSecurityCostsShareBasedAwardPlan	10800000
CY2020Q4	us-gaap	Redeemable Noncontrolling Interest Equity Fair Value RedeemableNoncontrollingInterestEquityFairValue	85800000
CY2019Q4	us-gaap	Redeemable Noncontrolling Interest Equity Fair Value RedeemableNoncontrollingInterestEquityFairValue	677900000
CY2020Q4	us-gaap	Minority Interest MinorityInterest	17400000
CY2019Q4	us-gaap	Minority Interest MinorityInterest	19700000
CY2020	jhg	Share Based Compensation Net ShareBasedCompensationNet	64600000
CY2019	jhg	Share Based Compensation Net ShareBasedCompensationNet	73700000
CY2018	jhg	Share Based Compensation Net ShareBasedCompensationNet	81600000
CY2020	jhg	Mutual Fund Share Awards Liability Settled Of Share Based Award Plan MutualFundShareAwardsLiabilitySettledOfShareBasedAwardPlan	28200000
CY2019	jhg	Mutual Fund Share Awards Liability Settled Of Share Based Award Plan MutualFundShareAwardsLiabilitySettledOfShareBasedAwardPlan	46200000
CY2018	jhg	Stock Based Payment Expense Charged To Comprehensive Income StockBasedPaymentExpenseChargedToComprehensiveIncome	188600000
CY2020Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	46600000
CY2020	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y9M18D
CY2020	jhg	Liability Settled Of Unrecognized Compensation Share Based Award Plan LiabilitySettledOfUnrecognizedCompensationShareBasedAwardPlan	7000000.0
CY2020	jhg	Mutual Fund Share Awards Liability Settled Of Unrecognized Compensation Share Based Award Plan MutualFundShareAwardsLiabilitySettledOfUnrecognizedCompensationShareBasedAwardPlan	9100000
CY2020	jhg	Mutual Fund Share Awards Liability Settled Of Unrecognized Compensation Share Based Award Plan Weighted Average Years MutualFundShareAwardsLiabilitySettledOfUnrecognizedCompensationShareBasedAwardPlanWeightedAverageYears	P1Y2M12D
CY2020	jhg	Profits Interests And Other Share Based Award Plan Unrecognized Compensation ProfitsInterestsAndOtherShareBasedAwardPlanUnrecognizedCompensation	7700000
CY2020	jhg	Profits Interests And Other Weighted Average Years ProfitsInterestsAndOtherWeightedAverageYears	P3Y3M18D
CY2020	jhg	Social Security Costs Share Based Award Plan Unrecognized Compensation SocialSecurityCostsShareBasedAwardPlanUnrecognizedCompensation	20700000
CY2020	jhg	Social Security Costs Weighted Average Years SocialSecurityCostsWeightedAverageYears	P0Y8M12D
CY2020	jhg	Unrecognized Compensation Costs Charged To Comprehensive Income Remaining UnrecognizedCompensationCostsChargedToComprehensiveIncomeRemaining	126800000
CY2020	jhg	Unrecognized Compensation Weighted Average Years Charge To Comprehensive Income Remaining UnrecognizedCompensationWeightedAverageYearsChargeToComprehensiveIncomeRemaining	P1Y7M6D
CY2020	jhg	Number Of Plans NumberOfPlans	2
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	8000000.0
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	7900000
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	5800000
CY2020	us-gaap	Defined Benefit Plan Benefit Obligation Payment For Settlement DefinedBenefitPlanBenefitObligationPaymentForSettlement	32200000
CY2020	jhg	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Number Of Years In Time DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationNumberOfYearsInTime	P15Y
CY2018	jhg	Prior Service Cost United Kingdom Ruling PriorServiceCostUnitedKingdomRuling	3900000
CY2019	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	400000
CY2020Q4	us-gaap	Defined Benefit Plan Expected Amortization Of Prior Service Cost Credit Next Fiscal Year DefinedBenefitPlanExpectedAmortizationOfPriorServiceCostCreditNextFiscalYear	400000
CY2020	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	900000
CY2019	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	800000
CY2018	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	1200000
CY2020	us-gaap	Defined Benefit Plan Recognized Net Gain Loss Due To Settlements1 DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1	1300000
CY2019	us-gaap	Defined Benefit Plan Recognized Net Gain Loss Due To Settlements1 DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1	2100000
CY2018	us-gaap	Defined Benefit Plan Recognized Net Gain Loss Due To Settlements1 DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1	1600000
CY2020	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	14100000
CY2019	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	17400000
CY2018	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	17300000
CY2020	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	400000
CY2019	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	400000
CY2020	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	12500000
CY2019	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	18600000
CY2018	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	21300000
CY2020	jhg	Defined Benefit Plan Periodic Benefit Cost Credit Before Contribution To Money Purchase Section DefinedBenefitPlanPeriodicBenefitCostCreditBeforeContributionToMoneyPurchaseSection	1600000
CY2019	jhg	Defined Benefit Plan Periodic Benefit Cost Credit Before Contribution To Money Purchase Section DefinedBenefitPlanPeriodicBenefitCostCreditBeforeContributionToMoneyPurchaseSection	-2100000
CY2018	jhg	Defined Benefit Plan Periodic Benefit Cost Credit Before Contribution To Money Purchase Section DefinedBenefitPlanPeriodicBenefitCostCreditBeforeContributionToMoneyPurchaseSection	-4400000
CY2020	jhg	Defined Benefit Plan Contribution To Money Purchase Section DefinedBenefitPlanContributionToMoneyPurchaseSection	-8200000
CY2019	jhg	Defined Benefit Plan Contribution To Money Purchase Section DefinedBenefitPlanContributionToMoneyPurchaseSection	-7900000
CY2018	jhg	Defined Benefit Plan Contribution To Money Purchase Section DefinedBenefitPlanContributionToMoneyPurchaseSection	-8000000.0
CY2020	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	9800000
CY2019	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	5800000
CY2018	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	3600000
CY2020	us-gaap	Undistributed Earnings UndistributedEarnings	161600000
CY2019	us-gaap	Undistributed Earnings UndistributedEarnings	427600000
CY2018	us-gaap	Undistributed Earnings UndistributedEarnings	523800000
CY2020	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	4700000
CY2019	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	11700000
CY2018	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	12700000
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	156900000
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	415900000
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	511100000
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	179400000
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	188000000.0
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	195000000.0
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	500000
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	600000
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	900000
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	179900000
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	188600000
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	195900000
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.87
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.21
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.62
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.87
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.21
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.61
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.44
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.44
CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.40
CY2020	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	1974600000
CY2019	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	1870100000
CY2018	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	1953200000
CY2020Q4	us-gaap	Due From Related Parties Current DueFromRelatedPartiesCurrent	210800000
CY2019Q4	us-gaap	Due From Related Parties Current DueFromRelatedPartiesCurrent	198200000
CY2020Q4	us-gaap	Accounts Receivable Related Parties Current AccountsReceivableRelatedPartiesCurrent	55700000
CY2019Q4	us-gaap	Accounts Receivable Related Parties Current AccountsReceivableRelatedPartiesCurrent	34000000.0
CY2020	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	2298600000
CY2019	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	2192400000
CY2018	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	2306400000
CY2020Q4	us-gaap	Noncurrent Assets NoncurrentAssets	2764200000
CY2019Q4	us-gaap	Noncurrent Assets NoncurrentAssets	3173300000
CY2020Q1	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	554900000
CY2020Q2	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	518000000.0
CY2020Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	568500000
CY2020Q4	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	657200000
CY2020	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	2298600000
CY2020Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-332400000
CY2020Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	106700000
CY2020Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	156500000
CY2020Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	227000000.0
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	157800000
CY2020Q1	us-gaap	Profit Loss ProfitLoss	-285200000
CY2020Q2	us-gaap	Profit Loss ProfitLoss	132300000
CY2020Q3	us-gaap	Profit Loss ProfitLoss	137100000
CY2020Q4	us-gaap	Profit Loss ProfitLoss	198400000
CY2020	us-gaap	Profit Loss ProfitLoss	182600000
CY2020Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-38200000
CY2020Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	29400000
CY2020Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	18200000
CY2020Q4	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	11600000
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	21000000.0
CY2020Q1	us-gaap	Undistributed Earnings UndistributedEarnings	-247000000.0
CY2020Q2	us-gaap	Undistributed Earnings UndistributedEarnings	102900000
CY2020Q3	us-gaap	Undistributed Earnings UndistributedEarnings	118900000
CY2020Q4	us-gaap	Undistributed Earnings UndistributedEarnings	186800000
CY2020	us-gaap	Undistributed Earnings UndistributedEarnings	161600000
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.35
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.55
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.65
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.03
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.87
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.35
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.55
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.65
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.02
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.87
CY2019Q1	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	519300000
CY2019Q2	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	535900000
CY2019Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	536000000.0
CY2019Q4	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	601200000
CY2019	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	2192400000
CY2019Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	124500000
CY2019Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	118500000
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	143600000
CY2019Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	154300000
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	540900000
CY2019Q1	us-gaap	Profit Loss ProfitLoss	99900000
CY2019Q2	us-gaap	Profit Loss ProfitLoss	112300000
CY2019Q3	us-gaap	Profit Loss ProfitLoss	113100000
CY2019Q4	us-gaap	Profit Loss ProfitLoss	120400000
CY2019	us-gaap	Profit Loss ProfitLoss	445700000
CY2019Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	5800000
CY2019Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	2900000
CY2019Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	1000000.0
CY2019Q4	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	8400000
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	18100000
CY2019Q1	us-gaap	Undistributed Earnings UndistributedEarnings	94100000
CY2019Q2	us-gaap	Undistributed Earnings UndistributedEarnings	109400000
CY2019Q3	us-gaap	Undistributed Earnings UndistributedEarnings	112100000
CY2019Q4	us-gaap	Undistributed Earnings UndistributedEarnings	112000000.0
CY2019	us-gaap	Undistributed Earnings UndistributedEarnings	427600000
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.48
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.56
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.58
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.59
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.21
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.48
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.56
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.58
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.59
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.21

Files In Submission

Name	View Source	Status
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0001558370-21-001617-index.html	Edgar Link	pending
0001558370-21-001617.txt	Edgar Link	pending
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$JHG
Janus Henderson Group PLC Stock $jhg

2020 Q4 Form 10-K Financial Statement

#000155837021001617 Filed on February 24, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$JHG Janus Henderson Group PLC Stock $jhg

2020 Q4 Form 10-K Financial Statement

#000155837021001617 Filed on February 24, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$JHG
Janus Henderson Group PLC Stock $jhg