Document and Entity Information (USD $) In Billions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jan. 31, 2012	Jun. 30, 2011
Entity Information [Line Items]
Entity Registrant Name	Invesco Ltd.
Entity Central Index Key	0000914208
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	FY
Amendment Flag	true
Entity Common Stock, Shares Outstanding		446,157,905
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 8.4
Amendment Description	This amendment (the “Amendment”) to the Annual Report on Form 10-K for the year ended December 31, 2011, of Invesco Ltd. (the “Original Form 10-K”) is being filed for the purposes of revising Note 21 - Guarantor Condensed Consolidating Financial Statements (the “Guarantor Footnote”) - in order to conform to the requirements of Rule 3-10 of Regulation S-X, including: grossing up the intercompany balances among the Guarantors, non-Guarantors, Issuer and Parent entities and presenting them as current and non-current intercompany receivables and payables on the Guarantor Condensed Consolidating Balance Sheets, grossing up the intercompany revenue and expense sharing transactions on the Guarantor Condensed Consolidating Statements of Income, and correcting the classification of certain intercompany loan, capital, and dividend activity as financing cash flows on the Guarantor Condensed Consolidating Statements of Cash Flows. These corrections of amounts within the Guarantor footnote concern presentation and categorization of intercompany balances and transactions. Consequently, none of the corrections affect Invesco Ltd.'s primary consolidated financial statements, including the Consolidated Balance Sheets, Statements of Income and Statements of Cash Flows. The primary purpose of the Guarantor footnote is to provide financial information to the holders of the company's publicly-traded debt instruments. The corrections to the presentation of this footnote do not affect compliance with the company's liquidity or debt covenants and do not result in a default under any of the terms of our debt instruments. This Amendment solely modifies Part II, Item 8, and Part IV, Items 15 and 16 of the Original Form 10-K. All other Items of the Original Form 10-K are unaffected by this Amendment and such Items have not been included in this Amendment. Information included in this Amendment is stated as of December 31, 2011, and does not reflect any subsequent events occurring after the filing of the Original Form 10-K.