Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Percent

No definition available.

Name:	ivz_BusinessCombinationAcquisitionofLessthan100PercentNoncontrollingInterestPercent
Namespace Prefix:	ivz_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Business Combination, Equity Consideration Transferred, Lock-up Period

+ References

No definition available.

+ Details

Name:	ivz_BusinessCombinationEquityConsiderationTransferredLockupPeriod
Namespace Prefix:	ivz_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Business Combination, Equity Interest Issued or Issuable, Preferred Stock, Liquidation Preference Per Share

+ References

No definition available.

+ Details

Name:	ivz_BusinessCombinationEquityInterestIssuedorIssuablePreferredStockLiquidationPreferencePerShare
Namespace Prefix:	ivz_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Cash Consideration Transferred

+ References

No definition available.

+ Details

Name:	ivz_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCashConsiderationTransferred
Namespace Prefix:	ivz_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Preferred Stock, Non-call Period

+ References

No definition available.

+ Details

Name:	ivz_PreferredStockNoncallPeriod
Namespace Prefix:	ivz_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Total Transaction And Integration Charges

+ References

No definition available.

+ Details

Name:	ivz_TotalTransactionAndIntegrationCharges
Namespace Prefix:	ivz_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of shares of equity interests issued or issuable to acquire entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

+ Details

Name:	us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_BusinessAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

+ References

No definition available.

+ Details

Name:	us-gaap_BusinessAcquisitionSharePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6613-128477

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6578-128477

+ Details

Name:	us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

+ Details

Name:	us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of assets, excluding financial assets and goodwill, that lack physical substance, having a projected indefinite period of benefit, acquired at the acquisition date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=116869197&loc=d3e4845-128472

+ Details

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of identifiable intangible assets recognized as of the acquisition date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 55
-Paragraph 37
-URI http://asc.fasb.org/extlink&oid=116868840&loc=d3e2207-128464

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=116869197&loc=d3e4845-128472

+ Details

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The percentage rate used to calculate dividend payments on preferred stock.

+ References

No definition available.

+ Details

Name:	us-gaap_PreferredStockDividendRatePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_BusinessAcquisitionAxis=ivz_OppenheimerFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_EquityInterestIssuedOrIssuableByTypeAxis=ivz_CommonStockandRestrictedStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_EquityInterestIssuedOrIssuableByTypeAxis=us-gaap_PreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_EquityInterestIssuedOrIssuableByTypeAxis=us-gaap_CommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_EquityInterestIssuedOrIssuableByTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=ivz_MassMutualMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=ivz_ManagementContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=ivz_ManagementContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TradeNamesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=ivz_MassMutualMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=ivz_OthersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_NonrecurringAdjustmentAxis=us-gaap_AcquisitionRelatedCostsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Business Combinations - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions			1 Months Ended	3 Months Ended		4 Months Ended	9 Months Ended
	Sep. 30, 2019	May 24, 2019	Jun. 30, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2018
Business Acquisition [Line Items]
Transaction, integration, and restructuring				$ 185.5	$ 33.1		$ 536.5	$ 75.1
OppenheimerFunds
Business Acquisition [Line Items]
Cash consideration	$ 35.0					$ 35.0
Preferred shares dividend rate (percent)							5.90%
Cash consideration						$ 15.4
Liquidation preference per share (in usd per share)		$ 1,000
Revenues of acquired entity			$ 217.1
Transaction, integration, and restructuring				$ 179.4			$ 510.0
Common and Restricted Stock \| OppenheimerFunds
Business Acquisition [Line Items]
Shares of common stock issued (shares)						81,900,000
Preferred shares \| OppenheimerFunds
Business Acquisition [Line Items]
Perpetual, non-cumulative preferred shares issued (shares)	4,010.5					$ 4,000.0
Non-call period						21 years
Preferred shares dividend rate (percent)						5.90%
Lock-up period		5 years
Other equity securities \| OppenheimerFunds
Business Acquisition [Line Items]
Shares of common stock issued (shares)						75,700,000
Perpetual, non-cumulative preferred shares issued (shares)	$ 1,453.6
Lock-up period		2 years
Restricted stock awards \| OppenheimerFunds
Business Acquisition [Line Items]
Shares of common stock issued (shares)						6,200,000
MassMutual \| Preferred shares \| OppenheimerFunds
Business Acquisition [Line Items]
Approximate stake help in common stock of combined firm (percent)	16.70%			16.70%		16.70%	16.70%
Management contracts \| OppenheimerFunds
Business Acquisition [Line Items]
Finite lived intangible assets acquired		$ 255.0
Estimated useful life		8 years
Management contracts \| OppenheimerFunds
Business Acquisition [Line Items]
Indefinite-lived intangible assets acquired		$ 4,907.0
Trade names \| OppenheimerFunds
Business Acquisition [Line Items]
Finite lived intangible assets acquired		$ 27.0
Estimated useful life		6 years
MassMutual \| Other equity securities \| OppenheimerFunds
Business Acquisition [Line Items]
Shares of common stock issued (shares)		75,563,041
Share price (in usd per share)		$ 19.195
Others \| Other equity securities \| OppenheimerFunds
Business Acquisition [Line Items]
Shares of common stock issued (shares)		153,574
Share price (in usd per share)		$ 20.42
Acquisition-related costs \| OppenheimerFunds
Business Acquisition [Line Items]
Transaction, integration, and restructuring				$ 8.1			$ 57.5