Invesco (IVZ) 10-Q 26 Apr 18 2018 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information	3 Months Ended
	Mar. 31, 2018shares
Document Information [Abstract]
Entity Registrant Name	Invesco Ltd.
Entity Central Index Key	914,208
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding	410,762,594

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
ASSETS
Cash and cash equivalents	$ 1,861.5	$ 2,006.4
Unsettled fund receivables	837.6	793.8
Accounts receivable	595	622.5
Investments	713.6	674.6
Cash and cash equivalents of CIP	260.8	511.3
Accounts receivable and other assets of CIP	157.5	131.5
Investments of CIP	5,453.5	5,658
Assets held for policyholders	12,902.2	12,444.5
Prepaid assets	124.9	124.4
Other assets	64.5	61.7
Property and equipment, net	484.4	490.7
Intangible assets, net	1,559.1	1,558.7
Goodwill	6,604.5	6,590.7
Total assets	31,619.1	31,668.8
LIABILITIES
Accrued compensation and benefits	371.6	696.1
Accounts payable and accrued expenses	820.8	895.7
Debt of CIP	4,502.7	4,799.8
Other liabilities of CIP	349.5	498.8
Policyholder payables	12,902.2	12,444.5
Unsettled fund payables	811.5	783.8
Long-term debt	2,076.4	2,075.8
Deferred tax liabilities, net	313.4	275.5
Total liabilities	22,148.1	22,470
Commitments and contingencies (See Note 11)
TEMPORARY EQUITY
Redeemable Noncontrolling Interest, Equity, Carrying Amount	281	243.2
Equity attributable to common shareholders:
Common shares ($0.20 par value; 1,050.0 million authorized; 490.4 million shares issued as of March 31, 2018 and December 31, 2017)	98.1	98.1
Additional paid-in-capital	6,217.4	6,282
Treasury shares	(2,715.4)	(2,781.9)
Retained earnings	5,626.6	5,489.1
Accumulated other comprehensive income, net of tax	(331.4)	(391.2)
Total equity attributable to common shareholders	8,895.3	8,696.1
Equity attributable to nonredeemable noncontrolling interests in consolidated entities	294.7	259.5
Total equity	9,190	8,955.6
Total liabilities and equity	$ 31,619.1	$ 31,668.8

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Common stock, par value	$ 0.2	$ 0.2
Common stock, shares authorized	1,050,000,000	1,050,000,000
Common stock, shares issued	490,400,000	490,400,000

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating revenues:
Investment management fees	$ 1,043.7	$ 955.2
Service and distribution fees	246.1	206.4
Performance fees	9.1	11.3
Other	56.9	19.7
Total operating revenues	1,355.8	1,192.6
Operating expenses:
Third-party distribution, service and advisory	419.1	349.3
Employee compensation	390.4	397.5
Marketing	28.1	24.4
Property, office and technology	102.2	85.5
General and administrative	94.9	78
Total operating expenses	1,034.7	934.7
Operating Income (Loss)	321.1	257.9
Other income/(expense):
Equity in earnings of unconsolidated affiliates	9.7	17.7
Interest and dividend income	4.2	2.9
Interest expense	(23.2)	(24)
Other gains and losses, net	(5.4)	6.9
Other gains/(losses) of CIP, net	27.2	28.5
Income before income taxes	333.6	289.9
Income tax provision	(68.4)	(75.7)
Net income	265.2	214.2
Net (income)/loss attributable to noncontrolling interests in consolidated entities	(11.3)	(2.2)
Net income attributable to Invesco Ltd	$ 253.9	$ 212
Basic:
Basic earnings per share (usd per share)	$ 0.62	$ 0.52
Diluted earnings per share:
Diluted earnings per share (usd per share)	0.62	0.52
Dividends declared per share (usd per share)	$ 0.29	$ 0.28

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 265.2	$ 214.2
Other Comprehensive Income (Loss), before Tax [Abstract]
Currency translation differences on investments in foreign subsidiaries, net of tax	64.6	62.6
Other Comprehensive Income, Other, Net of Tax	(1.6)	3
Other comprehensive income/(loss), net of tax	63	65.6
Total comprehensive income/(loss)	328.2	279.8
Comprehensive loss/(income) attributable to noncontrolling interests in consolidated entities	(11.3)	(2.2)
Comprehensive income/(loss) attributable to Invesco Ltd.	$ 316.9	$ 277.6

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating activities:
Net income	$ 265.2	$ 214.2
Adjustments to reconcile net income to net cash provided by/(used in) operating activities:
Amortization and depreciation	33.6	26.3
Share-based compensation expense	40.9	49.2
Other (gains)/losses, net	5.4	(6.2)
Other (gains)/losses of CIP, net	(8.8)	(10.9)
Equity in earnings of unconsolidated affiliates	(9.7)	(17.7)
Dividends from unconsolidated affiliates	0.9	6.8
Changes in operating assets and liabilities:
(Purchase)/sale of investments by CIP, net	3.2	(88.5)
(Purchase)/sale of trading investments, net	(31.8)	154.9
(Increase)/decrease in receivables	26.4	(1,157.7)
Increase/(decrease) in payables	(377.5)	956.1
Net cash provided by/(used in) operating activities	(52.2)	126.5
Investing activities:
Purchase of property, equipment and software	(20.6)	(27.1)
Purchase of investments by CIP	(938.6)	(1,735.4)
Sale of investments by CIP	661.2	1,683.9
Purchase of investments	(28.8)	(34.7)
Sale of investments	29	66.4
Capital distributions from equity method investees	0	3.1
Net cash provided by/(used in) investing activities	(297.8)	(43.8)
Financing activities:
Purchases of treasury shares	(39.3)	(52.5)
Dividends paid	(119.6)	(114.8)
Third-party capital invested into CIP	95.6	159.5
Third-party capital distributed by CIP	(29)	(26.3)
Borrowings of debt by CIP	53	940
Repayments of debt by CIP	(1.9)	(1,116.7)
Net borrowings/(repayments) under credit facility	0	(9.3)
Payment of contingent consideration	(3.4)	(3.6)
Net cash provided by/(used in) financing activities	(44.6)	(223.7)
Increase/(decrease) in cash and cash equivalents	(394.6)	(141)
Foreign exchange movement on cash and cash equivalents	37.5	14.4
Foreign exchange movement on cash and cash equivalents of CIP	1	0
Net cash inflows (outflows) upon consolidation/deconsolidation of CIP	(39.3)	(10.9)
Cash and cash equivalents, beginning of period	2,517.7	2,070.2
Cash and cash equivalents, end of period	2,122.3	1,932.7
Cash and cash equivalents	1,861.5	1,397
Cash and cash equivalents of CIP	260.8	535.7
Cash and cash equivalents, end of period	$ 2,517.7	$ 2,070.2

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity - USD ($) $ in Millions	Total	Common Shares [Member]	Additional Paid-In-Capital [Member]	Treasury Shares [Member]	Retained Earnings	Accumulated Other Comprehensive Income [Member]	Total Equity Attributable to Common Shareholders [Member]	Nonredeemable Noncontrolling Interests in Consolidated Entities [Member]	Redeemable noncontrolling interest [Member]
Beginning balance at Dec. 31, 2016	$ 7,611.8	$ 98.1	$ 6,227.4	$ (2,845.8)	$ 4,833.4	$ (809.3)	$ 7,503.8	$ 108
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	208.5				212		212	(3.5)
Other comprehensive income (loss)	65.6					65.6	65.6
Change in noncontrolling interests in consolidated entities, net	65.4							65.4
Dividends	(114.8)				(114.8)		(114.8)
Employee share plans:
Share-based compensation	49.2		49.2				49.2
Vested shares			(109)	(109)
Purchase of shares	(52.5)			(52.5)			(52.5)
Ending balance at Mar. 31, 2017	7,833.2	98.1	6,167.6	(2,789.3)	4,930.6	(743.7)	7,663.3	169.9
Beginning balance at Dec. 31, 2016									$ 283.7
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income									5.7
Change in noncontrolling interests in consolidated entities, net									(81.7)
Ending balance at Mar. 31, 2017									207.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, as adjusted	8,955.6	98.1	6,282	(2,781.9)	5,492.3	(394.4)	8,696.1	259.5	243.2
Beginning balance at Dec. 31, 2017	8,955.6	98.1	6,282	(2,781.9)	5,489.1	(391.2)	8,696.1	259.5
Adjustment for adoption of ASU 2015-02 (Accounting Standards Update 2016-01 [Member]) at Dec. 31, 2017	0	0	0	0	3.2	(3.2)	0	0	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	261.2				253.9		253.9	7.3
Other comprehensive income (loss)	63					63	63
Change in noncontrolling interests in consolidated entities, net	27.9							27.9
Dividends	(119.6)				(119.6)		(119.6)
Employee share plans:
Share-based compensation	40.9		40.9				40.9
Vested shares	0		(105.6)	(105.6)
Other share awards	0.3		0.1	0.2			0.3		0
Purchase of shares	(39.3)			(39.3)			(39.3)
Ending balance at Mar. 31, 2018	$ 9,190	$ 98.1	$ 6,217.4	$ (2,715.4)	$ 5,626.6	$ (331.4)	$ 8,895.3	$ 294.7
Beginning balance at Dec. 31, 2017									243.2
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income									4
Change in noncontrolling interests in consolidated entities, net									33.8
Ending balance at Mar. 31, 2018									$ 281

Accounting Policies

Accounting Policies	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
ACCOUNTING POLICIES	ACCOUNTING POLICIES Corporate Information Invesco Ltd. (Parent) and all of its consolidated entities (collectively, the company or Invesco) provide retail and institutional clients with an array of global investment management capabilities. The company operates globally and its sole business is investment management. Certain disclosures included in the company's annual report on Form 10-K for the year ended December 31, 2017 (annual report or Form 10-K) are not required to be included on an interim basis in the company's quarterly reports on Forms 10-Q (Report). The company has condensed or omitted these disclosures. Therefore, this Report should be read in conjunction with the company's annual report. Basis of Accounting and Consolidation The unaudited Condensed Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States (U.S. GAAP) for interim financial information and with rules and regulations of the Securities and Exchange Commission and consolidate the financial statements of the Parent and all of its controlled subsidiaries. In the opinion of management, the financial statements reflect all adjustments, consisting of normal recurring accruals, which are necessary for the fair statement of the financial condition and results of operations for the periods presented. All significant intercompany transactions, balances, revenues and expenses are eliminated upon consolidation. The preparation of financial statements in accordance with U.S. 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. Accounting Pronouncements Recently Adopted Revenue Recognition. On January 1, 2018 the company adopted Accounting Standard Update 2014-09, “Revenue from Contracts with Customers” (ASU 2014-09), which revised revenue accounting rules through the creation of Accounting Standard Codification Topic 606 (ACS 606) and expanded the disclosure requirements. The company adopted ASU 2014-09 on January 1, 2018 using the modified retrospective transition method applied to contracts that were not complete as of that date. Under this method, entities are required to report any effect from adoption as a cumulative effect adjustment to retained earnings at the adoption date. The adoption of the standard did not have an effect on opening retained earnings, net income or earnings per share measures. The impact of ASU 2014-09 on the timing of recognition of performance fee revenues may result in future performance fees being recognized earlier under ASU 2014-09, but this will depend on the terms and conditions in the relevant agreement. The application of the new principal versus agent guidance in ASU 2014-09 resulted in presentation changes in the Consolidated Statements of Income whereby certain costs are now reported on a gross basis, when Invesco is acting as principal, and reported on a net basis, when Invesco is acting as an agent. In accordance with the ASU 2014-09 requirements, the disclosure of the impact of adoption on the Condensed Consolidated Statements of Income was as follows (in millions): $ in millions Three months ended March 31, 2018 Condensed Consolidated Statements of Income As Reported Adjustments Related to Adoption of Balances Without Adoption of Operating revenues: Investment management fees 1,043.7 53.8 1,097.5 Service and distribution fees 246.1 (32.4 ) 213.7 Performance fees 9.1 — 9.1 Other 56.9 (41.0 ) 15.9 Total operating revenues 1,355.8 (19.6 ) 1,336.2 Operating expenses: Third-party distribution, service and advisory 419.1 (23.8 ) 395.3 Employee compensation 390.4 — 390.4 Marketing 28.1 — 28.1 Property, office and technology 102.2 — 102.2 General and administrative 94.9 4.2 99.1 Total operating expenses 1,034.7 (19.6 ) 1,015.1 Operating income 321.1 — 321.1 Financial Instruments. On January 1, 2018, the company adopted Accounting Standards Update 2016-01, "Financial Instruments - Overall: Recognition and Measurement of Financial Assets and Financial Liabilities" (ASU 2016-01). Under the new standard, all equity investments in unconsolidated entities (other than those accounted for using the equity method of accounting) will generally be measured at fair value with any changes recognized in earnings. ASU 2016-01 requires a modified retrospective approach to adoption. Accumulated gains of $3.2 million were reclassified into retained earnings at adoption date. With effect from the adoption of ASU 2016-01, seed money, investments held to settle the company's deferred compensation plan liabilities, and other equity securities are no longer categorized as trading investments or available-for-sale investments but instead are referred to as "equity investments," and all gains or losses arising from changes in the fair value of these equity investments will be included in income. Prior period balances have been conformed to be presented as "equity investments," however the prior period treatment of gains or losses arising from changes in the fair value of the investments was retained. As ASU 2016-01 required a modified retrospective approach to adoption, available-for-sale seed money balances of $69.3 million at December 31, 2017 , are presented as "equity investments" to conform to the current period presentation of seed money; however, the related accounting basis in that period was available-for-sale. Statement of Cash Flows. On January 1, 2018, the company adopted Accounting Standards Update 2016-15, "Statement of Cash Flows - Classification of Certain Cash Receipts and Cash Payments" (ASU 2016-15), which clarified how certain cash receipts and cash payments are classified and presented on the Statement of Cash Flows, including distributions from equity method investees. The amendments require a retrospective approach to adoption. As a result of adopting this standard, $6.2 million was reclassified from net cash provided by/(used in) investing activities to net cash provided by/(used in) operating activities for the three months ended March 31, 2017. On January 1, 2018, the company adopted Accounting Standards Update 2016-18, “Statement of Cash Flows: Restricted Cash” (ASU 2016-18). The standard requires the inclusion of restricted cash within cash and cash equivalents when reconciling the beginning and ending cash and cash equivalents balances on the statements of cashflows. ASU 2016-18 requires a retrospective approach to adoption. Accordingly, changes in CIP cash of $195.6 million for the three months ended March 31, 2017 are no longer presented as a component of the company's cash provided by operations as they were reported in the Form 10-Q for the period ended March 31, 2017. These changes in CIP cash are now form part of the reconciliation of corporate cash and CIP cash at the end of the Condensed Consolidated Statements of Cash Flows for the period ended March 31, 2017. The adoption of this standard does not impact corporate cash and cash equivalents. Pension Costs. On January 1, 2018, the company adopted Accounting Standard Update 2017-07, “Compensation-Retirement Benefits: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost” (ASU 2017-07). The amendments require that the service cost component of net periodic pension costs be recorded within employee compensation expense and the other components of net benefit cost be recorded in other gains and losses, net in the Condensed Consolidated Statements of Income. The company utilized a practical expedient that permits an employer to use the amounts disclosed in its pension plan footnote for the prior comparative periods as the estimation basis for applying the retrospective presentation. The application of the new rules results in the reclassification of the non-service cost components of the pension costs/(benefit) to other gains and losses, net, and has no impact to net income. For the three months ended March 31, 2017 , the reclassification decreased operating income by $0.7 million with a corresponding increase to other gains and losses, net. Other Income. On January 1, 2018, the company adopted Accounting Standard Update 2017-05, "Other Income-Gains and Losses from the Derecognition of Nonfinancial Assets: Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets” (ASU 2017-05). The standard clarified the scope of accounting for gains and losses from the derecognition of nonfinancial assets and added guidance for partial sales of nonfinancial assets. The adoption of this standard did not have a material impact on the company's financial condition, results of operations or cash flows. Pending Accounting Pronouncements In February 2016, the FASB issued Accounting Standards Update 2016-02, “Leases” (ASU 2016-02). The standard requires that lessees recognize lease assets and lease liabilities on the balance sheet for all leases with a lease term greater than 12 months. ASU 2016-02 is effective for fiscal years and interim periods within those years beginning after December 15, 2018 and requires a modified retrospective approach to adoption. The company plans to adopt ASU 2016-02 on January 1, 2019. The company is currently evaluating the potential impact of this standard which includes performing a review of a sample of lease arrangements. The company has established an international cross-functional team to assist in analyzing and assessing the impact of adopting the new lease accounting guidance. Revenue Recognition Revenue is measured and recognized based on the five step process outlined in ASC 606, Revenue from Contracts with Customers. Revenue is determined based on the transaction price negotiated with the customer, net of discounts, value added tax and other sales-related taxes. Investment management fees are derived from providing professional services to manage client accounts and sponsored investment vehicles. Investment management services are satisfied over time as the services are provided and are typically based upon a percentage of the value of the client’s assets under management. Investment management fees for certain arrangements include fees for distribution and administrative-related services. Any fees collected in advance are deferred and recognized as income over the period in which services are rendered. Service fees are earned for services rendered relating to fund accounting, transfer agent, administrative and/or other maintenance activities performed for sponsored investment vehicles. All of these services are transferred over time. Service fees are generally based upon a percentage of the value of the assets under management. The Company provides distribution services to certain sponsored investment vehicles. Fees are generally earned based upon a percentage of the value of the assets under management, as the fee amounts do not crystallize completely upon the sale of a share or unit. Accordingly, the distribution fee revenues are recognized over time as the amount of the fees becomes known. For example, U.S. distribution fees can include 12b-1 fees earned from certain mutual funds to cover allowable sales and marketing expenses for those funds and also include asset-based sales charges paid by certain mutual funds for a period of time after the sale of those funds. Generally, retail products offered outside of the U.S. do not generate a separate distribution fee; the quoted management fee rate is inclusive of these services. The Company also has certain arrangements whereby the distribution fees are paid upon the subscription or redemption of a share or unit. Performance fee revenues associated with retail funds will fluctuate from period to period and may not correlate with general market changes, since most of the fees are driven by relative performance to the respective benchmark rather than by absolute performance. Performance fee revenues, including carried interests and performance fees related to partnership investments and separate accounts, are generated on certain management contracts when performance hurdles are achieved. Such fee revenues are recorded in operating revenues when the contractual performance criteria have been met and when it is probable that a significant reversal of revenue recognized will not occur in future reporting periods. Cash receipt of performance fees generally occurs after the performance fee revenue is earned; however, the company may receive, from time-to-time, cash distributions of carried interest before any revenue is earned. Such distributions are reflected as deferred carried interest liabilities within accounts payable and accrued expenses on the Condensed Consolidated Balance Sheets. Given the uniqueness of each fee arrangement, performance fee contracts are evaluated on an individual basis to determine the timing of revenue recognition. Performance fees typically arise from investment management activities that were initially undertaken in prior reporting periods. Other revenues include fees derived primarily from transaction commissions earned upon the sale of new investments into certain of our funds and fees earned upon the completion of transactions in our real estate and private equity asset groups. Real estate transaction fees are derived from commissions earned through the buying and selling of properties. Private equity transaction fees include commissions associated with the restructuring of, and fees from providing advice to, portfolio companies held by the funds. These transaction fees are recorded in the Condensed Consolidated Statements of Income on the date when Invesco’s services are complete which typically coincides with when the transactions are legally complete. Principal versus Agent The company utilizes third party service providers to fulfill certain performance obligations in its revenue agreements. Generally, the company is deemed to be the principal in these arrangements, because the company controls the investment management and other related services before they are transferred to customers. Such control is evidenced by the company’s primary responsibility to customers, the ability to negotiate the third party contract price and select and direct third party service providers, or a combination of these factors. Therefore, investment management and service and distribution fee revenues and the related third party distribution, service and advisory expenses are reported on a gross basis. Third-party distribution, service and advisory expenses include periodic “renewal” commissions paid to brokers and independent financial advisors for the continuing oversight of their clients' assets over the time they are invested and are payments for the servicing of client accounts. Renewal commissions are calculated based upon a percentage of the AUM value and apply to much of the company's non-U.S. retail operations. As discussed above, the revenues from the company’s U.S. retail operations include 12b-1 distribution fees, which are largely passed through to brokers who sell the funds as third-party distribution expenses along with additional marketing support distribution costs. Both the revenues and the costs are dependent on the underlying AUM of the brokers' clients. Third-party distribution expenses also include the amortization of upfront commissions paid to broker-dealers for sales of fund shares with a contingent deferred sales charge (a charge levied to the investor for client redemption of AUM within a certain contracted period of time). The upfront distribution commissions are amortized over the redemption period. Also included in third-party distribution, service and advisory expenses are sub-transfer agency fees that are paid to third parties for processing client share purchases and redemptions, call center support and client reporting. These costs are reimbursed by the related funds.

Fair Value Of Assets And Liabil

Fair Value Of Assets And Liabilities	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
FAIR VALUE OF ASSETS AND LIABILITIES	FAIR VALUE OF ASSETS AND LIABILITIES The carrying value and fair value of financial instruments are presented in the below summary table. The fair value of financial instruments held by CIP is presented in Note 12 , "Consolidated Investment Products." See the company's most recently filed Form 10-K for additional disclosures on valuation methodology and fair value. March 31, 2018 December 31, 2017 $ in millions Carrying Value Fair Value Carrying Value Fair Value Cash and cash equivalents 1,861.5 1,861.5 2,006.4 2,006.4 Equity investments 381.4 381.4 346.6 346.6 Available-for-sale debt investments 11.1 11.1 15.9 15.9 Foreign time deposits * 28.7 28.7 28.6 28.6 Assets held for policyholders 12,902.2 12,902.2 12,444.5 12,444.5 Policyholder payables * (12,902.2 ) (12,902.2 ) (12,444.5 ) (12,444.5 ) Contingent consideration liability (53.6 ) (53.6 ) (57.4 ) (57.4 ) Long-term debt * (2,076.4 ) (2,180.2 ) (2,075.8 ) (2,258.1 ) * These financial instruments are not measured at fair value on a recurring basis. See the most recently filed Form 10-K for additional information about the carrying and fair values of these financial instruments. Foreign time deposits are measured at cost plus accrued interest, which approximates fair value, and are accordingly classified as Level 2 securities. The following table presents, by hierarchy levels, the carrying value of the company's assets and liabilities, including major security type for equity and debt securities, which are measured at fair value on the company's Condensed Consolidated Balance Sheets as of March 31, 2018 and December 31, 2017 , respectively: As of March 31, 2018 $ in millions Fair Value Measurements Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets: Cash equivalents: Money market funds 818.1 818.1 — — Investments:* Equity investments: Seed money 264.2 264.2 — — Investments related to deferred compensation plans 98.7 98.7 — — Other equity securities 18.5 18.5 — — Available-for-sale debt investments: Collateralized loan obligations (CLOs) 4.9 — 4.9 — Other debt securities 6.2 — — 6.2 Assets held for policyholders 12,902.2 12,902.2 — — Total 14,112.8 14,101.7 4.9 6.2 Liabilities: Contingent consideration liability (53.6 ) — — (53.6 ) Total (53.6 ) — — (53.6 ) As of December 31, 2017 $ in millions Fair Value Measurements Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs Significant Unobservable Inputs Assets: Cash equivalents: Money market funds 875.5 875.5 — — Investments:* Equity investments: Seed money 243.0 243.0 — — Investments related to deferred compensation plans 92.3 92.3 — — Other equity securities 11.3 11.3 — — Available-for-sale debt investments: CLOs 6.0 — 6.0 — Other debt securities 9.9 — — 9.9 Assets held for policyholders 12,444.5 12,444.5 — — Total 13,682.5 13,666.6 6.0 9.9 Liabilities: Contingent consideration liability (57.4 ) — — (57.4 ) Total (57.4 ) — — (57.4 ) * Foreign time deposits of $28.7 million ( December 31, 2017 : $28.6 million ) are excluded from this table. Equity method and other investments of $286.6 million and $5.8 million , respectively, ( December 31, 2017 : $277.3 million and $6.2 million , respectively) are also excluded from this table. These investments are not measured at fair value, in accordance with applicable accounting standards. The following table shows a reconciliation of the beginning and ending fair value measurements for level 3 assets and liabilities during the three months ended March 31, 2018 and March 31, 2017 , which are valued using significant unobservable inputs: Three months ended March 31, 2018 $ in millions Contingent Consideration Liability Other Debt Securities Beginning balance (57.4 ) 9.9 Net unrealized gains and losses included in other gains and losses, net* 0.4 (3.2 ) Disposition/settlements 3.4 — Other — (0.5 ) Ending balance (53.6 ) 6.2 Three months ended March 31, 2017 $ in millions Contingent Consideration Liability CLOs Other Debt Securities Beginning balance (78.2 ) 12.9 13.2 Purchases/acquisitions — — 7.3 Net unrealized gains and losses included in other gains and losses, net* 0.5 — — Disposition/settlements 3.6 — (7.6 ) Transfer from level 3 to level 2 — (12.9 ) — Ending balance (74.1 ) — 12.9 _______________ * These unrealized gains and losses are attributable to balances still held at the respective period ends. Contingent Consideration Liability At March 31, 2018 inputs used in the model included assumed growth rates in AUM ranging from (2.34)% to 0.74% (weighted average growth rate of (0.03)% ) and a discount rate of 4.47% . Changes in fair value are recorded in other gains and losses, net in the Condensed Consolidated Statements of Income in the period incurred. An increase in AUM levels and/or a decrease in the discount rate would increase the fair value of the contingent consideration liability, while a decrease in forecasted AUM and/or an increase in the discount rate would decrease the liability.

Investments

Investments	3 Months Ended
	Mar. 31, 2018
Investments [Abstract]
INVESTMENTS	INVESTMENTS The disclosures below include details of the company's investments. Investments held by CIP are detailed in Note 12 , "Consolidated Investment Products." $ in millions March 31, 2018 December 31, 2017 Equity investments: Seed money 264.2 243.0 Investments related to deferred compensation plans 98.7 92.3 Other equity securities 18.5 11.3 Available-for-sale debt investments: CLOs 4.9 6.0 Other debt securities 6.2 9.9 Equity method investments 286.6 277.3 Foreign time deposits 28.7 28.6 Other 5.8 6.2 Total investments 713.6 674.6 Available for sale debt investments Upon adoption of ASU 2016-01, as of January 1, 2018, seed money investments formerly classified as available-for-sale are now included as equity investments. Realized gains and losses recognized in the Condensed Consolidated Statements of Income during the period from investments classified as available-for-sale are as follows: For the three months ended March 31, 2018 $ in millions Proceeds from Sales Gross Realized Gains Gross Realized Losses CLOs 2.6 — — Other debt securities 0.2 — (0.1 ) 2.8 — (0.1 ) For the three months ended March 31, 2017 $ in millions Proceeds from Sales Gross Realized Gains Gross Realized Losses Seed money 34.2 1.6 (1.3 ) CLOs 2.0 0.3 — Other debt securities 7.6 — — 43.8 1.9 (1.3 ) Gross unrealized holding gains and losses recognized in other accumulated other comprehensive income/(loss) from available-for-sale debt investments are presented in the tables below: March 31, 2018 $ in millions Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value CLOs 3.5 1.4 — 4.9 Other debt securities 6.4 — (0.2 ) 6.2 9.9 1.4 (0.2 ) 11.1 December 31, 2017 $ in millions Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value Seed money 65.1 5.5 (1.3 ) 69.3 CLOs 4.9 1.1 — 6.0 Other debt securities 9.9 — — 9.9 79.9 6.6 (1.3 ) 85.2 At December 31, 2017 : 50 seed money funds had incurred gross unrealized holding losses. The following table provides a breakdown of the unrealized losses. December 31, 2017 $ in millions Fair Value Gross Unrealized Losses Less than 12 months 9.4 (0.8 ) 12 months or greater 15.0 (0.5 ) Total 24.4 (1.3 ) Available-for-sale debt securities as of March 31, 2018 by maturity, are set out below: Available-for-Sale (Fair Value) Less than one year 6.2 One to five years 0.5 Five to ten years 4.4 Greater than ten years — Total available-for-sale 11.1 Equity investments The unrealized gains and losses for the three months ended March 31, 2018 , that relates to equity investments still held at March 31, 2018 , was a $0.2 million net gain ( three months ended March 31, 2017 : $4.8 million net gain related to trading investments held at March 31, 2017).

Long-Term Debt

Long-Term Debt	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
LONG-TERM DEBT	LONG-TERM DEBT The disclosures below include details of the company's debt. Debt of CIP is detailed in Note 12 , “Consolidated Investment Products.” March 31, 2018 December 31, 2017 $ in millions Carrying Value** Fair Value Carrying Value** Fair Value Floating rate credit facility expiring August 11, 2022 — — — — Unsecured Senior Notes*: $600 million 3.125% - due November 30, 2022 597.0 603.6 596.9 608.8 $600 million 4.000% - due January 30, 2024 594.3 617.9 594.0 634.7 $500 million 3.750% - due January 15, 2026 495.2 501.4 495.1 515.0 $400 million 5.375% - due November 30, 2043 389.9 457.3 389.8 499.6 Long-term debt 2,076.4 2,180.2 2,075.8 2,258.1 ____________ * The company's senior note indentures contain certain restrictions on mergers or consolidations. Beyond these items, there are no other restrictive covenants in the indentures. ** The difference between the principal amounts and the carrying values of the senior notes in the table above reflect the unamortized debt issuance costs and discounts. The company maintains approximately $10.1 million in letters of credit from a variety of banks. The letters of credit are generally one -year automatically-renewable facilities and are maintained for various commercial reasons.

Share Capital

Share Capital	3 Months Ended
	Mar. 31, 2018
Equity [Abstract]
SHARE CAPITAL	SHARE CAPITAL The number of common shares and common share equivalents issued are represented in the table below: As of In millions March 31, 2018 December 31, 2017 Common shares issued 490.4 490.4 Less: Treasury shares for which dividend and voting rights do not apply (79.6 ) (83.3 ) Common shares outstanding 410.8 407.1

Other Comprehensive Income_(Los

Other Comprehensive Income/(Loss)	3 Months Ended
	Mar. 31, 2018
Equity [Abstract]
OTHER COMPREHENSIVE INCOME/(LOSS)	OTHER COMPREHENSIVE INCOME/(LOSS) The components of accumulated other comprehensive income/(loss) were as follows: For the three months ended March 31, 2018 $ in millions Foreign currency translation Employee benefit plans Equity method investments Available-for-sale investments Total Other comprehensive income/(loss) net of tax: Currency translation differences on investments in foreign subsidiaries 64.6 — — — 64.6 Other comprehensive income, net — 0.4 (2.3 ) 0.3 (1.6 ) Other comprehensive income/(loss), net of tax 64.6 0.4 (2.3 ) 0.3 63.0 Beginning balance (290.5 ) (109.7 ) 4.3 4.7 (391.2 ) Adjustment for adoption of ASU 2016-01 — — — (3.2 ) (3.2 ) January 1, 2018, as adjusted (290.5 ) (109.7 ) 4.3 1.5 (394.4 ) Other comprehensive income/(loss), net of tax 64.6 0.4 (2.3 ) 0.3 63.0 Ending balance (225.9 ) (109.3 ) 2.0 1.8 (331.4 ) For the three months ended March 31, 2017 $ in millions Foreign currency translation Employee benefit plans Equity method investments Available-for-sale investments Total Other comprehensive income/(loss) net of tax: Currency translation differences on investments in foreign subsidiaries 62.6 — — — 62.6 Other comprehensive income, net — 0.2 0.3 2.5 3.0 Other comprehensive income/(loss) 62.6 0.2 0.3 2.5 65.6 Beginning balance (679.9 ) (139.2 ) 4.8 5.0 (809.3 ) Other comprehensive income/(loss) 62.6 0.2 0.3 2.5 65.6 Ending balance (617.3 ) (139.0 ) 5.1 7.5 (743.7 ) Net Investment Hedge The Company designated certain intercompany debt as a non-derivative net investment hedging instrument against foreign currency exposure related to its net investment in foreign operations. At March 31, 2018 , £130.0 million ( $182.5 million ) of intercompany debt was designated as a net investment hedge. For the three months ended March 31, 2018 , the Company recognized foreign currency losses of $6.6 million resulting from the net investment hedge within currency translation differences on investments in foreign subsidiaries in other comprehensive income. No hedge ineffectiveness was recognized in income.

Revenue Revenue

Revenue Revenue	3 Months Ended
	Mar. 31, 2018
Revenue Recognition and Deferred Revenue [Abstract]
Revenue	REVENUE The geographic disaggregation of revenue for the three months ended March 31, 2018 is presented below. There are no revenues attributed to the company's country of domicile, Bermuda. $ in millions For the three months ended March 31, 2018 North America 818.0 EMEA 469.9 Asia-Pacific 67.9 Total operating revenues 1,355.8 The opening and closing balances of deferred carried interest liabilities for the three months ended March 31, 2018 were $60.4 million and $60.4 million , respectively. During the three months ended March 31, 2018 , no performance fee revenue was recognized that was included in the deferred carried interest liability balance at the beginning of the period.

Share-Based Compensation

Share-Based Compensation	3 Months Ended
	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
SHARE-BASED COMPENSATION	SHARE-BASED COMPENSATION The company recognized total expenses of $40.9 million and $49.2 million related to equity-settled share-based payment transactions in the three months ended March 31, 2018 and 2017 , respectively. Share Awards Movements on share awards during the periods ended March 31 , are detailed below: For the three months ended March 31, 2018 For the three months ended March 31, 2017 Millions of shares, except fair values Time- Vested Performance- Vested Weighted Average Grant Date Fair Value ($) Time- Vested Performance- Vested Unvested at the beginning of period 12.0 0.9 31.52 12.1 0.8 Granted during the period 5.1 0.4 32.55 5.1 0.3 Forfeited during the period (0.1 ) — 31.74 (0.3 ) — Vested and distributed during the period (4.2 ) (0.3 ) 32.17 (4.4 ) (0.2 ) Unvested at the end of the period 12.8 1.0 31.72 12.5 0.9 The total fair value of shares that vested during the three months ended March 31, 2018 was $142.7 million ( three months ended March 31, 2017 : $145.9 million ). The weighted average grant date fair value of the share awards that were granted during the three months ended March 31, 2018 was $32.55 ( three months ended March 31, 2017 : $32.19 ). At March 31, 2018 , there was $403.2 million of total unrecognized compensation cost related to non-vested share awards; that cost is expected to be recognized over a weighted average period of 2.93 years .

Taxation

Taxation	3 Months Ended
	Mar. 31, 2018
Income Tax Disclosure [Abstract]
TAXATION	TAXATION At March 31, 2018 , the total amount of gross unrecognized tax benefits was $19.2 million as compared to the December 31, 2017 total of $19.6 million . At December 31, 2017 , the company had not completed the accounting for the tax effects of enacting the Tax Cuts and Jobs Act (the "2017 Tax Act") and therefore recognized a provisional income tax benefit of $130.7 million . As of March 31, 2018 , the company continues to evaluate the accounting and as future guidance is issued, management finalizes its positions, and calculations are refined the estimates could potentially be affected.

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
EARNINGS PER SHARE	EARNINGS PER SHARE The calculation of earnings per share is as follows: For the three months ended March 31, In millions, except per share data 2018 2017 Net income $265.2 $214.2 Net (income)/loss attributable to noncontrolling interests in consolidated entities (11.3 ) (2.2 ) Net income attributable to Invesco Ltd. 253.9 212.0 Less: Allocation of earnings to restricted shares (7.5 ) (6.4 ) Net income attributable to common shareholders $246.4 $205.6 Invesco Ltd: Weighted average shares outstanding - basic 411.3 407.7 Dilutive effect of non-participating share-based awards 0.5 0.3 Weighted average shares outstanding - diluted 411.8 408.0 Common shareholders: Weighted average shares outstanding - basic 411.3 407.7 Less: Weighted average restricted shares (12.2 ) (12.2 ) Weighted average common shares outstanding - basic 399.1 395.5 Dilutive effect of non-participating share-based awards 0.5 0.3 Weighted average common shares outstanding - diluted 399.6 395.8 Earnings per share: Basic earnings per share $0.62 $0.52 Diluted earnings per share $0.62 $0.52 See Note 8 , “Share-Based Compensation,” for a summary of share awards outstanding under the company's share-based compensation programs. These programs could result in the issuance of common shares from time to time that would affect the measurement of basic and diluted earnings per share. There were no performance-vested or time-vested awards excluded from the computation of diluted earnings per share during the three months ended March 31 , 2018 due to their inclusion being anti-dilutive ( three months ended March 31, 2017 : 0.3 million shares of performance-vested awards and no time-vested based awards ). There were 0.1 million contingently issuable shares excluded from the diluted earnings per share computation during the three months ended March 31, 2018 ( three months ended March 31, 2017 : 0.2 million ), because the necessary performance conditions for the shares to be issuable had not yet been satisfied at the end of the respective period.

Commitments And Contingencies

Commitments And Contingencies	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Commitments and contingencies may arise in the ordinary course of business. Off Balance Sheet Commitments The company has committed to co-invest in certain sponsored investment products which may be called in future periods. At March 31, 2018 , the company's undrawn capital commitments were $298.8 million ( December 31, 2017 : $292.8 million ). The Parent and various company subsidiaries have entered into agreements with financial institutions to guarantee certain obligations of other company subsidiaries. The company would be required to perform under these guarantees in the event of certain defaults. The company has not had prior claims or losses pursuant to these contracts and expects the risk of loss to be remote. Legal Contingencies The company is from time to time involved in litigation relating to claims arising in the ordinary course of its business. The nature and progression of litigation can make it difficult to predict the impact a particular lawsuit will have on the company. There are many reasons that the company cannot make these assessments, including, among others, one or more of the following: the proceeding is in its early stages; the damages sought are unspecified, unsupportable, unexplained or uncertain; the claimant is seeking relief other than compensatory damages; the matter presents novel legal claims or other meaningful legal uncertainties; discovery has not started or is not complete; there are significant facts in dispute; and there are other parties who may share in any ultimate liability. In management’s opinion, adequate accrual has been made as of March 31, 2018 to provide for any such losses that may arise from matters for which the company could reasonably estimate an amount. Management is of the opinion that the ultimate resolution of such claims will not materially affect the company’s business, financial position, results of operation or liquidity. Furthermore, in management’s opinion, it is not possible to estimate a range of reasonably possible losses with respect to other litigation contingencies. The investment management industry also is subject to extensive levels of ongoing regulatory oversight and examination. In the United States, United Kingdom, and other jurisdictions in which the company operates, governmental authorities regularly make inquiries, hold investigations and administer market conduct examinations with respect to the company's compliance with applicable laws and regulations. Additional lawsuits or regulatory enforcement actions arising out of these inquiries may in the future be filed against the company and related entities and individuals in the United States, United Kingdom, and other jurisdictions in which the company and its affiliates operate. Any material loss of investor and/or client confidence as a result of such inquiries and/or litigation could result in a significant decline in AUM, which would have an adverse effect on the company’s future financial results and its ability to grow its business.

Consolidated Investment Product

Consolidated Investment Products	3 Months Ended
	Mar. 31, 2018
Consolidated Investment Products [Abstract]
CONSOLIDATED INVESTMENT PRODUCTS	CONSOLIDATED INVESTMENT PRODUCTS (CIP) The following table presents the balances related to CIP that are included on the Condensed Consolidated Balance Sheets as well as Invesco's net interest in the CIP for each period presented. At March 31, 2018 all CIP are VIEs. See the company's most recently filed Form 10-K for additional disclosures on valuation methodology and fair value. As of $ in millions March 31, 2018 December 31, 2017 Cash and cash equivalents of CIP 260.8 511.3 Accounts receivable and other assets of CIP 157.5 131.5 Investments of CIP 5,453.5 5,658.0 Less: Debt of CIP (4,502.7 ) (4,799.8 ) Less: Other liabilities of CIP (349.5 ) (498.8 ) Less: Retained earnings 16.0 16.7 Less: Accumulated other comprehensive income, net of tax (15.9 ) (16.6 ) Less: Equity attributable to redeemable noncontrolling interests (281.0 ) (243.2 ) Less: Equity attributable to nonredeemable noncontrolling interests (293.7 ) (258.6 ) Invesco's net interests in CIP 445.0 500.5 The following tables reflect the impact of consolidation of investment products into the Condensed Consolidated Statements of Income for the three months ended March 31 , 2018 and 2017 : Three months ended March 31, $ in millions 2018 2017 Total operating revenues (7.0 ) (13.2 ) Total operating expenses 3.2 (1.2 ) Operating income (10.2 ) (12.0 ) Equity in earnings of unconsolidated affiliates (4.2 ) 1.5 Other gains and losses, net (0.9 ) (10.1 ) Interest and dividend income of CIP 57.8 53.8 Interest expense of CIP (39.4 ) (36.2 ) Other gains/(losses) of CIP, net 8.8 10.9 Income before income taxes 11.9 7.9 Income tax provision — — Net income 11.9 7.9 Net (income)/loss attributable to noncontrolling interests in consolidated entities (11.3 ) (2.2 ) Net income attributable to Invesco Ltd. 0.6 5.7 Non-consolidated VIEs At March 31, 2018 , the company's carrying value and maximum risk of loss with respect to VIEs in which the company is not the primary beneficiary was $242.7 million ( December 31, 2017 : $227.3 million ). Balance Sheet information - newly consolidated VIEs/VOEs During the three months ended March 31, 2018 , there were no newly consolidated VIEs ( March 31, 2017 : the company consolidated two new VIEs.) The table below illustrates the summary balance sheet amounts related to these products before consolidation into the company. The balances below are reflective of the balances existing at the consolidation date after the initial funding of the investments by the company and unrelated third-party investors. The current period activity for the consolidated funds, including the initial funding and subsequent investment of initial cash balances into underlying investments of CIP, is reflected in the company’s Condensed Consolidated Financial Statements. For the three months ended March 31, 2017 $ in millions VIEs Cash and cash equivalents of CIP 8.2 Accounts receivable and other assets of CIP 1.3 Investments of CIP 45.8 Total assets 55.3 Debt of CIP 15.1 Other liabilities of CIP 13.7 Total liabilities 28.8 Total equity 26.5 Total liabilities and equity 55.3 During the three months ended March 31, 2018 , the company determined that it was no longer the primary beneficiary of two VIEs ( March 31, 2017 : the company determined that it was no longer the primary beneficiary of two VIEs and one voting rights entity (VOE)). The amounts deconsolidated from the Condensed Consolidated Balance Sheets are illustrated in the table below. There was no net impact to the Condensed Consolidated Statements of Income for the three months ended March 31, 2018 and 2017 from the deconsolidation of these investment products. For the three months ended March 31, 2018 For the three months ended March 31, 2017 $ in millions VIEs VIEs VOEs Cash and cash equivalents of CIP 39.3 10.9 — Accounts receivable and other assets of CIP 8.3 3.2 0.2 Investments of CIP 339.9 139.9 49.8 Total assets 387.5 154.0 50.0 Debt of CIP 375.3 — — Other liabilities of CIP 3.2 1.9 — Total liabilities 378.5 1.9 — Total equity 9.0 152.1 50.0 Total liabilities and equity 387.5 154.0 50.0 The following tables present the fair value hierarchy levels of certain CIP balances which are measured at fair value as of March 31, 2018 and December 31, 2017 : As of March 31, 2018 $ in millions Fair Value Measurements Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Investments Measured at NAV as a practical expedient Assets: Bank loans 4,693.5 — 4,693.5 — — Bonds 296.3 — 296.3 — — Equity securities 198.2 196.5 1.7 — — Equity and fixed income mutual funds 19.2 19.2 — — — Investments in other private equity funds 165.1 — — — 165.1 Real estate investments 81.2 — — 81.2 — Total assets at fair value 5,453.5 215.7 4,991.5 81.2 165.1 As of December 31, 2017 $ in millions Fair Value Measurements Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Investments Measured at NAV as a practical expedient Assets: Bank loans 4,894.2 — 4,894.2 — — Bonds 302.0 — 302.0 — — Equity securities 203.2 198.8 4.4 — — Equity and fixed income mutual funds 19.0 19.0 — — — Investments in other private equity funds 163.4 — — — 163.4 Real estate investments 76.2 — — 76.2 — Total assets at fair value 5,658.0 217.8 5,200.6 76.2 163.4 The following tables show a reconciliation of the beginning and ending fair value measurements for level 3 assets and liabilities using significant unobservable inputs: Three months ended March 31, 2018 Three months ended March 31, 2017 $ in millions Level 3 Assets Level 3 Assets Beginning balance 76.2 40.7 Purchases — 15.1 Sales (0.7 ) — Gains and losses included in the Condensed Consolidated Statements of Income* 5.7 (1.0 ) Ending balance 81.2 54.8 ____________ * Included in gains/(losses) of CIP, net in the Condensed Consolidated Statements of Income for the three months ended March 31, 2018 are $5.7 million , in net unrealized gains attributable to investments still held at March 31, 2018 by CIP (for the three months ended March 31, 2017 : $1.0 million , in net unrealized losses are attributable to investments still held at March 31, 2017 by CIP). The collateral assets held by consolidated CLOs are primarily invested in senior secured bank loans, bonds, and equity securities. Bank loan investments of $4,656.5 million , which comprise the majority of consolidated CLO portfolio collateral, are senior secured corporate loans from a variety of industries, including but not limited to the aerospace and defense, broadcasting, technology, utilities, household products, healthcare, oil and gas, and finance industries. Bank loan investments mature at various dates between 2018 and 2026 , pay interest at LIBOR plus a spread of up to 11.0% , and typically range in S&P credit rating categories from BBB down to unrated. Interest income on bank loans and bonds is recognized based on the unpaid principal balance and stated interest rate of these investments on an accrual basis. At March 31, 2018 , the unpaid principal balance exceeds the fair value of the senior secured bank loans and bonds by approximately $52.8 million ( December 31, 2017 : the unpaid principal balance exceeded the fair value of the senior secured bank loans and bonds by approximately $84.6 million ). Approximately less than 1% of the collateral assets were in default as of March 31, 2018 and 2017 . CLO investments are valued based on price quotations provided by third party pricing sources. These third party sources aggregate indicative price quotations daily to provide the company with a price for the CLO investments. The company has developed internal controls to review the reasonableness and completeness of these price quotations on a daily basis. If necessary, price quotations are challenged through the third-party pricing source price challenge process. Notes issued by consolidated CLOs mature at various dates between 2026 and 2031 and have a weighted average maturity of 10.0 years . The notes are issued in various tranches with different risk profiles. The interest rates are generally variable rates based on LIBOR plus a pre-defined spread, which varies from 0.92% for the more senior tranches to 8.25% for the more subordinated tranches. The investors in this debt are not affiliated with the company and have no recourse to the general credit of the company for this debt . Quantitative Information about Level 3 Fair Value Measurements The following tables show significant unobservable inputs used in the fair value measurement of level 3 assets at March 31, 2018 and December 31, 2017 : Assets and Liabilities Fair Value at March 31, 2018 ($ in millions) Valuation Technique Unobservable Inputs Range Weighted Average (by fair value) Real Estate Investments $81.2 Discounted Cash Flow Discount rate 7% - 25% 15.0 % Terminal capitalization rate 4.25 % 4.25 % Average rent growth rate 2% - 3% 2.5 % Assets and Liabilities Fair Value at December 31, 2017 ($ in millions) Valuation Technique Unobservable Inputs Range Weighted Average (by fair value) Real Estate Investments $76.2 Discounted Cash Flow Discount rate 7% - 33% 17.0 % Terminal capitalization rate 5.3 % 5.3 % Average rent growth rate 2% - 3% 2.5 % The following narrative will indicate the sensitivity of inputs illustrating the impact of significant increases to the inputs. A directionally opposite impact would apply for significant decreases in these inputs: • For real estate investments, a change in the average rent growth rate would result in a directionally-opposite change in the assumptions for discount rate and terminal capitalization rate. Significant increases in the average growth rate would result in significantly higher fair values. Significant increases in the assumptions for discount rate and terminal capitalization rate in isolation would result in significantly lower fair value measurements. The table below summarizes as of March 31, 2018 and December 31, 2017 , the nature of investments that are valued using the NAV as a practical expedient and any related liquidation restrictions or other factors which may impact the ultimate value realized. March 31, 2018 December 31, 2017 in millions, except term data Fair Value Total Unfunded Commitments Weighted Average Remaining Term (2) Fair Value Total Unfunded Commitments Weighted Average Remaining Term (2) Private equity funds (1) $165.1 $39.2 5.9 years $163.4 $53.9 5.5 years ____________ (1) These investments are not subject to redemption; however, for certain funds, the investors may sell or transfer their interest, which may require approval by the general partner of the underlying funds. (2) These investments are expected to be returned through distributions as a result of liquidations of the funds' underlying assets over the weighted average periods indicated. For investments held by consolidated private equity funds, significant increases in discounts in isolation would result in significantly lower fair value measurements, while significant increases in revenue multiple assumptions in isolation would result in significantly higher fair value measurements. An increase in discount assumptions would result in a directionally opposite change in the assumptions for revenue multiple, resulting in lower fair value measurements.

Related Parties

Related Parties	3 Months Ended
	Mar. 31, 2018
Related Party Transactions [Abstract]
RELATED PARTIES	RELATED PARTIES Certain managed funds are deemed to be affiliated entities under the related party definition in ASC 850, "Related Party Disclosures." Additionally, related parties include those defined in the company's proxy statement. Three months ended March 31, $ in millions 2018 2017 Affiliated operating revenues: Investment management fees 916.1 832.1 Service and distribution fees 245.3 206.1 Performance fees 4.1 8.3 Other 54.8 16.8 Total affiliated operating revenues 1,220.3 1,063.3 $ in millions March 31, 2018 December 31, 2017 Affiliated asset balances: Cash and cash equivalents 818.1 875.5 Unsettled fund receivables 387.1 204.0 Accounts receivable 349.8 359.9 Investments 646.0 608.5 Assets held for policyholders 12,901.9 12,444.2 Other assets 3.6 9.2 Total affiliated asset balances 15,106.5 14,501.3 Affiliated liability balances: Accrued compensation and benefits 79.2 90.7 Accounts payable and accrued expenses 65.3 64.5 Unsettled fund payables 380.9 288.8 Total affiliated liability balances 525.4 444.0

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2018
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS On April 26, 2018 , the company announced a first quarter 2018 dividend of 30.0 cents per share, payable on June 1, 2018 , to shareholders of record at the close of business on May 11, 2018 with an ex-dividend date of May 10, 2018 . On April 6, 2018, the company acquired the Guggenheim Investments' ETF business for $1.2 billion . The company borrowed $835 million on its credit facility in connection with the acquisition. As of the date of this Report, the initial purchase price allocation has not been completed, as the valuation of the identifiable intangible assets has not been finalized. The company expects that the purchase price will be allocated primarily to intangible assets (mainly fund management contracts) and goodwill.

Accounting Policies (Policy)

Accounting Policies (Policy)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Basis of Accounting and Consolidation	Basis of Accounting and Consolidation The unaudited Condensed Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States (U.S. GAAP) for interim financial information and with rules and regulations of the Securities and Exchange Commission and consolidate the financial statements of the Parent and all of its controlled subsidiaries. In the opinion of management, the financial statements reflect all adjustments, consisting of normal recurring accruals, which are necessary for the fair statement of the financial condition and results of operations for the periods presented. All significant intercompany transactions, balances, revenues and expenses are eliminated upon consolidation.
Accounting Pronouncements Recently Adopted and Pending Accounting Pronouncements	Accounting Pronouncements Recently Adopted Revenue Recognition. On January 1, 2018 the company adopted Accounting Standard Update 2014-09, “Revenue from Contracts with Customers” (ASU 2014-09), which revised revenue accounting rules through the creation of Accounting Standard Codification Topic 606 (ACS 606) and expanded the disclosure requirements. The company adopted ASU 2014-09 on January 1, 2018 using the modified retrospective transition method applied to contracts that were not complete as of that date. Under this method, entities are required to report any effect from adoption as a cumulative effect adjustment to retained earnings at the adoption date. The adoption of the standard did not have an effect on opening retained earnings, net income or earnings per share measures. The impact of ASU 2014-09 on the timing of recognition of performance fee revenues may result in future performance fees being recognized earlier under ASU 2014-09, but this will depend on the terms and conditions in the relevant agreement. The application of the new principal versus agent guidance in ASU 2014-09 resulted in presentation changes in the Consolidated Statements of Income whereby certain costs are now reported on a gross basis, when Invesco is acting as principal, and reported on a net basis, when Invesco is acting as an agent. In accordance with the ASU 2014-09 requirements, the disclosure of the impact of adoption on the Condensed Consolidated Statements of Income was as follows (in millions): $ in millions Three months ended March 31, 2018 Condensed Consolidated Statements of Income As Reported Adjustments Related to Adoption of Balances Without Adoption of Operating revenues: Investment management fees 1,043.7 53.8 1,097.5 Service and distribution fees 246.1 (32.4 ) 213.7 Performance fees 9.1 — 9.1 Other 56.9 (41.0 ) 15.9 Total operating revenues 1,355.8 (19.6 ) 1,336.2 Operating expenses: Third-party distribution, service and advisory 419.1 (23.8 ) 395.3 Employee compensation 390.4 — 390.4 Marketing 28.1 — 28.1 Property, office and technology 102.2 — 102.2 General and administrative 94.9 4.2 99.1 Total operating expenses 1,034.7 (19.6 ) 1,015.1 Operating income 321.1 — 321.1 Financial Instruments. On January 1, 2018, the company adopted Accounting Standards Update 2016-01, "Financial Instruments - Overall: Recognition and Measurement of Financial Assets and Financial Liabilities" (ASU 2016-01). Under the new standard, all equity investments in unconsolidated entities (other than those accounted for using the equity method of accounting) will generally be measured at fair value with any changes recognized in earnings. ASU 2016-01 requires a modified retrospective approach to adoption. Accumulated gains of $3.2 million were reclassified into retained earnings at adoption date. With effect from the adoption of ASU 2016-01, seed money, investments held to settle the company's deferred compensation plan liabilities, and other equity securities are no longer categorized as trading investments or available-for-sale investments but instead are referred to as "equity investments," and all gains or losses arising from changes in the fair value of these equity investments will be included in income. Prior period balances have been conformed to be presented as "equity investments," however the prior period treatment of gains or losses arising from changes in the fair value of the investments was retained. As ASU 2016-01 required a modified retrospective approach to adoption, available-for-sale seed money balances of $69.3 million at December 31, 2017 , are presented as "equity investments" to conform to the current period presentation of seed money; however, the related accounting basis in that period was available-for-sale. Statement of Cash Flows. On January 1, 2018, the company adopted Accounting Standards Update 2016-15, "Statement of Cash Flows - Classification of Certain Cash Receipts and Cash Payments" (ASU 2016-15), which clarified how certain cash receipts and cash payments are classified and presented on the Statement of Cash Flows, including distributions from equity method investees. The amendments require a retrospective approach to adoption. As a result of adopting this standard, $6.2 million was reclassified from net cash provided by/(used in) investing activities to net cash provided by/(used in) operating activities for the three months ended March 31, 2017. On January 1, 2018, the company adopted Accounting Standards Update 2016-18, “Statement of Cash Flows: Restricted Cash” (ASU 2016-18). The standard requires the inclusion of restricted cash within cash and cash equivalents when reconciling the beginning and ending cash and cash equivalents balances on the statements of cashflows. ASU 2016-18 requires a retrospective approach to adoption. Accordingly, changes in CIP cash of $195.6 million for the three months ended March 31, 2017 are no longer presented as a component of the company's cash provided by operations as they were reported in the Form 10-Q for the period ended March 31, 2017. These changes in CIP cash are now form part of the reconciliation of corporate cash and CIP cash at the end of the Condensed Consolidated Statements of Cash Flows for the period ended March 31, 2017. The adoption of this standard does not impact corporate cash and cash equivalents. Pension Costs. On January 1, 2018, the company adopted Accounting Standard Update 2017-07, “Compensation-Retirement Benefits: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost” (ASU 2017-07). The amendments require that the service cost component of net periodic pension costs be recorded within employee compensation expense and the other components of net benefit cost be recorded in other gains and losses, net in the Condensed Consolidated Statements of Income. The company utilized a practical expedient that permits an employer to use the amounts disclosed in its pension plan footnote for the prior comparative periods as the estimation basis for applying the retrospective presentation. The application of the new rules results in the reclassification of the non-service cost components of the pension costs/(benefit) to other gains and losses, net, and has no impact to net income. For the three months ended March 31, 2017 , the reclassification decreased operating income by $0.7 million with a corresponding increase to other gains and losses, net. Other Income. On January 1, 2018, the company adopted Accounting Standard Update 2017-05, "Other Income-Gains and Losses from the Derecognition of Nonfinancial Assets: Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets” (ASU 2017-05). The standard clarified the scope of accounting for gains and losses from the derecognition of nonfinancial assets and added guidance for partial sales of nonfinancial assets. The adoption of this standard did not have a material impact on the company's financial condition, results of operations or cash flows. Pending Accounting Pronouncements In February 2016, the FASB issued Accounting Standards Update 2016-02, “Leases” (ASU 2016-02). The standard requires that lessees recognize lease assets and lease liabilities on the balance sheet for all leases with a lease term greater than 12 months. ASU 2016-02 is effective for fiscal years and interim periods within those years beginning after December 15, 2018 and requires a modified retrospective approach to adoption. The company plans to adopt ASU 2016-02 on January 1, 2019. The company is currently evaluating the potential impact of this standard which includes performing a review of a sample of lease arrangements. The company has established an international cross-functional team to assist in analyzing and assessing the impact of adopting the new lease accounting guidance. Revenue Recognition Revenue is measured and recognized based on the five step process outlined in ASC 606, Revenue from Contracts with Customers. Revenue is determined based on the transaction price negotiated with the customer, net of discounts, value added tax and other sales-related taxes. Investment management fees are derived from providing professional services to manage client accounts and sponsored investment vehicles. Investment management services are satisfied over time as the services are provided and are typically based upon a percentage of the value of the client’s assets under management. Investment management fees for certain arrangements include fees for distribution and administrative-related services. Any fees collected in advance are deferred and recognized as income over the period in which services are rendered. Service fees are earned for services rendered relating to fund accounting, transfer agent, administrative and/or other maintenance activities performed for sponsored investment vehicles. All of these services are transferred over time. Service fees are generally based upon a percentage of the value of the assets under management. The Company provides distribution services to certain sponsored investment vehicles. Fees are generally earned based upon a percentage of the value of the assets under management, as the fee amounts do not crystallize completely upon the sale of a share or unit. Accordingly, the distribution fee revenues are recognized over time as the amount of the fees becomes known. For example, U.S. distribution fees can include 12b-1 fees earned from certain mutual funds to cover allowable sales and marketing expenses for those funds and also include asset-based sales charges paid by certain mutual funds for a period of time after the sale of those funds. Generally, retail products offered outside of the U.S. do not generate a separate distribution fee; the quoted management fee rate is inclusive of these services. The Company also has certain arrangements whereby the distribution fees are paid upon the subscription or redemption of a share or unit. Performance fee revenues associated with retail funds will fluctuate from period to period and may not correlate with general market changes, since most of the fees are driven by relative performance to the respective benchmark rather than by absolute performance. Performance fee revenues, including carried interests and performance fees related to partnership investments and separate accounts, are generated on certain management contracts when performance hurdles are achieved. Such fee revenues are recorded in operating revenues when the contractual performance criteria have been met and when it is probable that a significant reversal of revenue recognized will not occur in future reporting periods. Cash receipt of performance fees generally occurs after the performance fee revenue is earned; however, the company may receive, from time-to-time, cash distributions of carried interest before any revenue is earned. Such distributions are reflected as deferred carried interest liabilities within accounts payable and accrued expenses on the Condensed Consolidated Balance Sheets. Given the uniqueness of each fee arrangement, performance fee contracts are evaluated on an individual basis to determine the timing of revenue recognition. Performance fees typically arise from investment management activities that were initially undertaken in prior reporting periods. Other revenues include fees derived primarily from transaction commissions earned upon the sale of new investments into certain of our funds and fees earned upon the completion of transactions in our real estate and private equity asset groups. Real estate transaction fees are derived from commissions earned through the buying and selling of properties. Private equity transaction fees include commissions associated with the restructuring of, and fees from providing advice to, portfolio companies held by the funds. These transaction fees are recorded in the Condensed Consolidated Statements of Income on the date when Invesco’s services are complete which typically coincides with when the transactions are legally complete. Principal versus Agent The company utilizes third party service providers to fulfill certain performance obligations in its revenue agreements. Generally, the company is deemed to be the principal in these arrangements, because the company controls the investment management and other related services before they are transferred to customers. Such control is evidenced by the company’s primary responsibility to customers, the ability to negotiate the third party contract price and select and direct third party service providers, or a combination of these factors. Therefore, investment management and service and distribution fee revenues and the related third party distribution, service and advisory expenses are reported on a gross basis. Third-party distribution, service and advisory expenses include periodic “renewal” commissions paid to brokers and independent financial advisors for the continuing oversight of their clients' assets over the time they are invested and are payments for the servicing of client accounts. Renewal commissions are calculated based upon a percentage of the AUM value and apply to much of the company's non-U.S. retail operations. As discussed above, the revenues from the company’s U.S. retail operations include 12b-1 distribution fees, which are largely passed through to brokers who sell the funds as third-party distribution expenses along with additional marketing support distribution costs. Both the revenues and the costs are dependent on the underlying AUM of the brokers' clients. Third-party distribution expenses also include the amortization of upfront commissions paid to broker-dealers for sales of fund shares with a contingent deferred sales charge (a charge levied to the investor for client redemption of AUM within a certain contracted period of time). The upfront distribution commissions are amortized over the redemption period. Also included in third-party distribution, service and advisory expenses are sub-transfer agency fees that are paid to third parties for processing client share purchases and redemptions, call center support and client reporting. These costs are reimbursed by the related funds.
Fair Value Measurement

Accounting Policies Accounting

Accounting Policies Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles	In accordance with the ASU 2014-09 requirements, the disclosure of the impact of adoption on the Condensed Consolidated Statements of Income was as follows (in millions): $ in millions Three months ended March 31, 2018 Condensed Consolidated Statements of Income As Reported Adjustments Related to Adoption of Balances Without Adoption of Operating revenues: Investment management fees 1,043.7 53.8 1,097.5 Service and distribution fees 246.1 (32.4 ) 213.7 Performance fees 9.1 — 9.1 Other 56.9 (41.0 ) 15.9 Total operating revenues 1,355.8 (19.6 ) 1,336.2 Operating expenses: Third-party distribution, service and advisory 419.1 (23.8 ) 395.3 Employee compensation 390.4 — 390.4 Marketing 28.1 — 28.1 Property, office and technology 102.2 — 102.2 General and administrative 94.9 4.2 99.1 Total operating expenses 1,034.7 (19.6 ) 1,015.1 Operating income 321.1 — 321.1

Fair Value Of Assets And Liab24

Fair Value Of Assets And Liabilities (Tables)	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value By Balance Sheet Grouping	The carrying value and fair value of financial instruments are presented in the below summary table. The fair value of financial instruments held by CIP is presented in Note 12 , "Consolidated Investment Products." See the company's most recently filed Form 10-K for additional disclosures on valuation methodology and fair value. March 31, 2018 December 31, 2017 $ in millions Carrying Value Fair Value Carrying Value Fair Value Cash and cash equivalents 1,861.5 1,861.5 2,006.4 2,006.4 Equity investments 381.4 381.4 346.6 346.6 Available-for-sale debt investments 11.1 11.1 15.9 15.9 Foreign time deposits * 28.7 28.7 28.6 28.6 Assets held for policyholders 12,902.2 12,902.2 12,444.5 12,444.5 Policyholder payables * (12,902.2 ) (12,902.2 ) (12,444.5 ) (12,444.5 ) Contingent consideration liability (53.6 ) (53.6 ) (57.4 ) (57.4 ) Long-term debt * (2,076.4 ) (2,180.2 ) (2,075.8 ) (2,258.1 ) * These financial instruments are not measured at fair value on a recurring basis. See the most recently filed Form 10-K for additional information about the carrying and fair values of these financial instruments. Foreign time deposits are measured at cost plus accrued interest, which approximates fair value, and are accordingly classified as Level 2 securities.
Tri-Level Hierarchy, Carrying Value	he following table presents, by hierarchy levels, the carrying value of the company's assets and liabilities, including major security type for equity and debt securities, which are measured at fair value on the company's Condensed Consolidated Balance Sheets as of March 31, 2018 and December 31, 2017 , respectively: As of March 31, 2018 $ in millions Fair Value Measurements Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets: Cash equivalents: Money market funds 818.1 818.1 — — Investments:* Equity investments: Seed money 264.2 264.2 — — Investments related to deferred compensation plans 98.7 98.7 — — Other equity securities 18.5 18.5 — — Available-for-sale debt investments: Collateralized loan obligations (CLOs) 4.9 — 4.9 — Other debt securities 6.2 — — 6.2 Assets held for policyholders 12,902.2 12,902.2 — — Total 14,112.8 14,101.7 4.9 6.2 Liabilities: Contingent consideration liability (53.6 ) — — (53.6 ) Total (53.6 ) — — (53.6 ) As of December 31, 2017 $ in millions Fair Value Measurements Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs Significant Unobservable Inputs Assets: Cash equivalents: Money market funds 875.5 875.5 — — Investments:* Equity investments: Seed money 243.0 243.0 — — Investments related to deferred compensation plans 92.3 92.3 — — Other equity securities 11.3 11.3 — — Available-for-sale debt investments: CLOs 6.0 — 6.0 — Other debt securities 9.9 — — 9.9 Assets held for policyholders 12,444.5 12,444.5 — — Total 13,682.5 13,666.6 6.0 9.9 Liabilities: Contingent consideration liability (57.4 ) — — (57.4 ) Total (57.4 ) — — (57.4 ) * Foreign time deposits of $28.7 million ( December 31, 2017 : $28.6 million ) are excluded from this table. Equity method and other investments of $286.6 million and $5.8 million , respectively, ( December 31, 2017 : $277.3 million and $6.2 million , respectively) are also excluded from this table. These investments are not measured at fair value, in accordance with applicable accounting standards.
Reconciliation of Balance, Fair Value Measurement, Level 3	he following table shows a reconciliation of the beginning and ending fair value measurements for level 3 assets and liabilities during the three months ended March 31, 2018 and March 31, 2017 , which are valued using significant unobservable inputs: Three months ended March 31, 2018 $ in millions Contingent Consideration Liability Other Debt Securities Beginning balance (57.4 ) 9.9 Net unrealized gains and losses included in other gains and losses, net* 0.4 (3.2 ) Disposition/settlements 3.4 — Other — (0.5 ) Ending balance (53.6 ) 6.2 Three months ended March 31, 2017 $ in millions Contingent Consideration Liability CLOs Other Debt Securities Beginning balance (78.2 ) 12.9 13.2 Purchases/acquisitions — — 7.3 Net unrealized gains and losses included in other gains and losses, net* 0.5 — — Disposition/settlements 3.6 — (7.6 ) Transfer from level 3 to level 2 — (12.9 ) — Ending balance (74.1 ) — 12.9 _______________ * These unrealized gains and losses are attributable to balances still held at the respective period ends. Contingent Consideration Liability At March 31, 2018 inputs used in the model included assumed growth rates in AUM ranging from (2.34)% to 0.74% (weighted average growth rate of (0.03)% ) and a discount rate of 4.47% . Changes in fair value are recorded in other gains and losses, net in the Condensed Consolidated Statements of Income in the period incurred. An increase in AUM levels and/or a decrease in the discount rate would increase the fair value of the contingent consideration liability, while a decrease in forecasted AUM and/or an increase in the discount rate would decrease the liability.

Investments (Tables)

Investments (Tables)	3 Months Ended
	Mar. 31, 2018
Investments [Abstract]
Marketable Securities	$ in millions March 31, 2018 December 31, 2017 Equity investments: Seed money 264.2 243.0 Investments related to deferred compensation plans 98.7 92.3 Other equity securities 18.5 11.3 Available-for-sale debt investments: CLOs 4.9 6.0 Other debt securities 6.2 9.9 Equity method investments 286.6 277.3 Foreign time deposits 28.7 28.6 Other 5.8 6.2 Total investments 713.6 674.6
Realized Gains Losses Available-For-Sale Securities	Realized gains and losses recognized in the Condensed Consolidated Statements of Income during the period from investments classified as available-for-sale are as follows: For the three months ended March 31, 2018 $ in millions Proceeds from Sales Gross Realized Gains Gross Realized Losses CLOs 2.6 — — Other debt securities 0.2 — (0.1 ) 2.8 — (0.1 ) For the three months ended March 31, 2017 $ in millions Proceeds from Sales Gross Realized Gains Gross Realized Losses Seed money 34.2 1.6 (1.3 ) CLOs 2.0 0.3 — Other debt securities 7.6 — — 43.8 1.9 (1.3 )
Gross Unrealized Holding Gains And Losses Recognized In Other Accumulated Comprehensive Income From Available-For-Sale Investments	Gross unrealized holding gains and losses recognized in other accumulated other comprehensive income/(loss) from available-for-sale debt investments are presented in the tables below: March 31, 2018 $ in millions Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value CLOs 3.5 1.4 — 4.9 Other debt securities 6.4 — (0.2 ) 6.2 9.9 1.4 (0.2 ) 11.1 December 31, 2017 $ in millions Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value Seed money 65.1 5.5 (1.3 ) 69.3 CLOs 4.9 1.1 — 6.0 Other debt securities 9.9 — — 9.9 79.9 6.6 (1.3 ) 85.2
Breakdown Of Available-For-Sale Investments with Unrealized Losses	At December 31, 2017 : 50 seed money funds had incurred gross unrealized holding losses. The following table provides a breakdown of the unrealized losses. December 31, 2017 $ in millions Fair Value Gross Unrealized Losses Less than 12 months 9.4 (0.8 ) 12 months or greater 15.0 (0.5 ) Total 24.4 (1.3 )
Held-to-maturity Securities [Table Text Block]	Available-for-sale debt securities as of March 31, 2018 by maturity, are set out below: Available-for-Sale (Fair Value) Less than one year 6.2 One to five years 0.5 Five to ten years 4.4 Greater than ten years — Total available-for-sale 11.1

Long-Term Debt (Tables)

Long-Term Debt (Tables)	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Schedule Of Long-Term Debt Instruments	The disclosures below include details of the company's debt. Debt of CIP is detailed in Note 12 , “Consolidated Investment Products.” March 31, 2018 December 31, 2017 $ in millions Carrying Value** Fair Value Carrying Value** Fair Value Floating rate credit facility expiring August 11, 2022 — — — — Unsecured Senior Notes*: $600 million 3.125% - due November 30, 2022 597.0 603.6 596.9 608.8 $600 million 4.000% - due January 30, 2024 594.3 617.9 594.0 634.7 $500 million 3.750% - due January 15, 2026 495.2 501.4 495.1 515.0 $400 million 5.375% - due November 30, 2043 389.9 457.3 389.8 499.6 Long-term debt 2,076.4 2,180.2 2,075.8 2,258.1 ____________ * The company's senior note indentures contain certain restrictions on mergers or consolidations. Beyond these items, there are no other restrictive covenants in the indentures. ** The difference between the principal amounts and the carrying values of the senior notes in the table above reflect the unamortized debt issuance costs and discounts.

Share Capital (Tables)

Share Capital (Tables)	3 Months Ended
	Mar. 31, 2018
Equity [Abstract]
Movements In Shares Issued And Outstanding	The number of common shares and common share equivalents issued are represented in the table below: As of In millions March 31, 2018 December 31, 2017 Common shares issued 490.4 490.4 Less: Treasury shares for which dividend and voting rights do not apply (79.6 ) (83.3 ) Common shares outstanding 410.8 407.1

Other Comprehensive Income_(L28

Other Comprehensive Income/(Loss) (Tables)	3 Months Ended
	Mar. 31, 2018
Equity [Abstract]
Accumulated Other Comprehensive Income	The components of accumulated other comprehensive income/(loss) were as follows: For the three months ended March 31, 2018 $ in millions Foreign currency translation Employee benefit plans Equity method investments Available-for-sale investments Total Other comprehensive income/(loss) net of tax: Currency translation differences on investments in foreign subsidiaries 64.6 — — — 64.6 Other comprehensive income, net — 0.4 (2.3 ) 0.3 (1.6 ) Other comprehensive income/(loss), net of tax 64.6 0.4 (2.3 ) 0.3 63.0 Beginning balance (290.5 ) (109.7 ) 4.3 4.7 (391.2 ) Adjustment for adoption of ASU 2016-01 — — — (3.2 ) (3.2 ) January 1, 2018, as adjusted (290.5 ) (109.7 ) 4.3 1.5 (394.4 ) Other comprehensive income/(loss), net of tax 64.6 0.4 (2.3 ) 0.3 63.0 Ending balance (225.9 ) (109.3 ) 2.0 1.8 (331.4 ) For the three months ended March 31, 2017 $ in millions Foreign currency translation Employee benefit plans Equity method investments Available-for-sale investments Total Other comprehensive income/(loss) net of tax: Currency translation differences on investments in foreign subsidiaries 62.6 — — — 62.6 Other comprehensive income, net — 0.2 0.3 2.5 3.0 Other comprehensive income/(loss) 62.6 0.2 0.3 2.5 65.6 Beginning balance (679.9 ) (139.2 ) 4.8 5.0 (809.3 ) Other comprehensive income/(loss) 62.6 0.2 0.3 2.5 65.6 Ending balance (617.3 ) (139.0 ) 5.1 7.5 (743.7 )

Revenue Revenue (Tables)

Revenue Revenue (Tables)	3 Months Ended
	Mar. 31, 2018
Revenue Recognition and Deferred Revenue [Abstract]
Geographic disaggregation of revenue	REVENUE The geographic disaggregation of revenue for the three months ended March 31, 2018 is presented below. There are no revenues attributed to the company's country of domicile, Bermuda. $ in millions For the three months ended March 31, 2018 North America 818.0 EMEA 469.9 Asia-Pacific 67.9 Total operating revenues 1,355.8 The opening and closing balances of deferred carried interest liabilities for the three months ended March 31, 2018 were $60.4 million and $60.4 million , respectively. During the three months ended March 31, 2018 , no performance fee revenue was recognized that was included in the deferred carried interest liability balance at the beginning of the period.

Share-Based Compensation (Table

Share-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Movements Of Share Awards	Movements on share awards during the periods ended March 31 , are detailed below: For the three months ended March 31, 2018 For the three months ended March 31, 2017 Millions of shares, except fair values Time- Vested Performance- Vested Weighted Average Grant Date Fair Value ($) Time- Vested Performance- Vested Unvested at the beginning of period 12.0 0.9 31.52 12.1 0.8 Granted during the period 5.1 0.4 32.55 5.1 0.3 Forfeited during the period (0.1 ) — 31.74 (0.3 ) — Vested and distributed during the period (4.2 ) (0.3 ) 32.17 (4.4 ) (0.2 ) Unvested at the end of the period 12.8 1.0 31.72 12.5 0.9

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
Calculation Of Earnings Per Share	The calculation of earnings per share is as follows: For the three months ended March 31, In millions, except per share data 2018 2017 Net income $265.2 $214.2 Net (income)/loss attributable to noncontrolling interests in consolidated entities (11.3 ) (2.2 ) Net income attributable to Invesco Ltd. 253.9 212.0 Less: Allocation of earnings to restricted shares (7.5 ) (6.4 ) Net income attributable to common shareholders $246.4 $205.6 Invesco Ltd: Weighted average shares outstanding - basic 411.3 407.7 Dilutive effect of non-participating share-based awards 0.5 0.3 Weighted average shares outstanding - diluted 411.8 408.0 Common shareholders: Weighted average shares outstanding - basic 411.3 407.7 Less: Weighted average restricted shares (12.2 ) (12.2 ) Weighted average common shares outstanding - basic 399.1 395.5 Dilutive effect of non-participating share-based awards 0.5 0.3 Weighted average common shares outstanding - diluted 399.6 395.8 Earnings per share: Basic earnings per share $0.62 $0.52 Diluted earnings per share $0.62 $0.52

Consolidated Investment Produ32

Consolidated Investment Products (Tables)	3 Months Ended
	Mar. 31, 2018
Consolidated Investment Products [Abstract]
Balances Related To CIP	The following table presents the balances related to CIP that are included on the Condensed Consolidated Balance Sheets as well as Invesco's net interest in the CIP for each period presented. At March 31, 2018 all CIP are VIEs. See the company's most recently filed Form 10-K for additional disclosures on valuation methodology and fair value. As of $ in millions March 31, 2018 December 31, 2017 Cash and cash equivalents of CIP 260.8 511.3 Accounts receivable and other assets of CIP 157.5 131.5 Investments of CIP 5,453.5 5,658.0 Less: Debt of CIP (4,502.7 ) (4,799.8 ) Less: Other liabilities of CIP (349.5 ) (498.8 ) Less: Retained earnings 16.0 16.7 Less: Accumulated other comprehensive income, net of tax (15.9 ) (16.6 ) Less: Equity attributable to redeemable noncontrolling interests (281.0 ) (243.2 ) Less: Equity attributable to nonredeemable noncontrolling interests (293.7 ) (258.6 ) Invesco's net interests in CIP 445.0 500.5
Condensed Consolidating Statement Of Income Line Items Reflecting Impact Of Consolidation Of Investment Products Into The Condensed Consolidated Statements Of Income	The following tables reflect the impact of consolidation of investment products into the Condensed Consolidated Statements of Income for the three months ended March 31 , 2018 and 2017 : Three months ended March 31, $ in millions 2018 2017 Total operating revenues (7.0 ) (13.2 ) Total operating expenses 3.2 (1.2 ) Operating income (10.2 ) (12.0 ) Equity in earnings of unconsolidated affiliates (4.2 ) 1.5 Other gains and losses, net (0.9 ) (10.1 ) Interest and dividend income of CIP 57.8 53.8 Interest expense of CIP (39.4 ) (36.2 ) Other gains/(losses) of CIP, net 8.8 10.9 Income before income taxes 11.9 7.9 Income tax provision — — Net income 11.9 7.9 Net (income)/loss attributable to noncontrolling interests in consolidated entities (11.3 ) (2.2 ) Net income attributable to Invesco Ltd. 0.6 5.7
VIE Balance Sheets Consolidated In Period	For the three months ended March 31, 2017 $ in millions VIEs Cash and cash equivalents of CIP 8.2 Accounts receivable and other assets of CIP 1.3 Investments of CIP 45.8 Total assets 55.3 Debt of CIP 15.1 Other liabilities of CIP 13.7 Total liabilities 28.8 Total equity 26.5 Total liabilities and equity 55.3 During the three months ended March 31, 2018 , the company determined that it was no longer the primary beneficiary of two VIEs ( March 31, 2017 : the company determined that it was no longer the primary beneficiary of two VIEs and one voting rights entity (VOE)). The amounts deconsolidated from the Condensed Consolidated Balance Sheets are illustrated in the table below. There was no net impact to the Condensed Consolidated Statements of Income for the three months ended March 31, 2018 and 2017 from the deconsolidation of these investment products. For the three months ended March 31, 2018 For the three months ended March 31, 2017 $ in millions VIEs VIEs VOEs Cash and cash equivalents of CIP 39.3 10.9 — Accounts receivable and other assets of CIP 8.3 3.2 0.2 Investments of CIP 339.9 139.9 49.8 Total assets 387.5 154.0 50.0 Debt of CIP 375.3 — — Other liabilities of CIP 3.2 1.9 — Total liabilities 378.5 1.9 — Total equity 9.0 152.1 50.0 Total liabilities and equity 387.5 154.0 50.0
Fair Value Hierarchy Levels Of Investments Held And Notes Issued By Consolidated Investment Products	The following tables present the fair value hierarchy levels of certain CIP balances which are measured at fair value as of March 31, 2018 and December 31, 2017 : As of March 31, 2018 $ in millions Fair Value Measurements Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Investments Measured at NAV as a practical expedient Assets: Bank loans 4,693.5 — 4,693.5 — — Bonds 296.3 — 296.3 — — Equity securities 198.2 196.5 1.7 — — Equity and fixed income mutual funds 19.2 19.2 — — — Investments in other private equity funds 165.1 — — — 165.1 Real estate investments 81.2 — — 81.2 — Total assets at fair value 5,453.5 215.7 4,991.5 81.2 165.1 As of December 31, 2017 $ in millions Fair Value Measurements Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Investments Measured at NAV as a practical expedient Assets: Bank loans 4,894.2 — 4,894.2 — — Bonds 302.0 — 302.0 — — Equity securities 203.2 198.8 4.4 — — Equity and fixed income mutual funds 19.0 19.0 — — — Investments in other private equity funds 163.4 — — — 163.4 Real estate investments 76.2 — — 76.2 — Total assets at fair value 5,658.0 217.8 5,200.6 76.2 163.4
Beginning And Ending Fair Value Measurements For Level 3 Assets And Liabilities	The following tables show a reconciliation of the beginning and ending fair value measurements for level 3 assets and liabilities using significant unobservable inputs: Three months ended March 31, 2018 Three months ended March 31, 2017 $ in millions Level 3 Assets Level 3 Assets Beginning balance 76.2 40.7 Purchases — 15.1 Sales (0.7 ) — Gains and losses included in the Condensed Consolidated Statements of Income* 5.7 (1.0 ) Ending balance 81.2 54.8 ____________ * Included in gains/(losses) of CIP, net in the Condensed Consolidated Statements of Income for the three months ended March 31, 2018 are $5.7 million , in net unrealized gains attributable to investments still held at March 31, 2018 by CIP (for the three months ended March 31, 2017 : $1.0 million , in net unrealized losses
Fair Value Inputs, Assets and Liabilities, Quantitative Information, Consolidated Investment Products	Quantitative Information about Level 3 Fair Value Measurements The following tables show significant unobservable inputs used in the fair value measurement of level 3 assets at March 31, 2018 and December 31, 2017 : Assets and Liabilities Fair Value at March 31, 2018 ($ in millions) Valuation Technique Unobservable Inputs Range Weighted Average (by fair value) Real Estate Investments $81.2 Discounted Cash Flow Discount rate 7% - 25% 15.0 % Terminal capitalization rate 4.25 % 4.25 % Average rent growth rate 2% - 3% 2.5 % Assets and Liabilities Fair Value at December 31, 2017 ($ in millions) Valuation Technique Unobservable Inputs Range Weighted Average (by fair value) Real Estate Investments $76.2 Discounted Cash Flow Discount rate 7% - 33% 17.0 % Terminal capitalization rate 5.3 % 5.3 % Average rent growth rate 2% - 3% 2.5 % The following narrative will indicate the sensitivity of inputs illustrating the impact of significant increases to the inputs. A directionally opposite impact would apply for significant decreases in these inputs: • For real estate investments, a change in the average rent growth rate would result in a directionally-opposite change in the assumptions for discount rate and terminal capitalization rate. Significant increases in the average growth rate would result in significantly higher fair values. Significant increases in the assumptions for discount rate and terminal capitalization rate in isolation would result in significantly lower fair value measurements. The table below summarizes as of March 31, 2018 and December 31, 2017 , the nature of investments that are valued using the NAV as a practical expedient and any related liquidation restrictions or other factors which may impact the ultimate value realized. March 31, 2018 December 31, 2017 in millions, except term data Fair Value Total Unfunded Commitments Weighted Average Remaining Term (2) Fair Value Total Unfunded Commitments Weighted Average Remaining Term (2) Private equity funds (1) $165.1 $39.2 5.9 years $163.4 $53.9 5.5 years ____________ (1) These investments are not subject to redemption; however, for certain funds, the investors may sell or transfer their interest, which may require approval by the general partner of the underlying funds. (2) These investments are expected to be returned through distributions as a result of liquidations of the funds' underlying assets over the weighted average periods indicated.

Related Parties (Tables)

Related Parties (Tables)	3 Months Ended
	Mar. 31, 2018
Related Party Transactions [Abstract]
Schedule of Related Party Transactions	Three months ended March 31, $ in millions 2018 2017 Affiliated operating revenues: Investment management fees 916.1 832.1 Service and distribution fees 245.3 206.1 Performance fees 4.1 8.3 Other 54.8 16.8 Total affiliated operating revenues 1,220.3 1,063.3 $ in millions March 31, 2018 December 31, 2017 Affiliated asset balances: Cash and cash equivalents 818.1 875.5 Unsettled fund receivables 387.1 204.0 Accounts receivable 349.8 359.9 Investments 646.0 608.5 Assets held for policyholders 12,901.9 12,444.2 Other assets 3.6 9.2 Total affiliated asset balances 15,106.5 14,501.3 Affiliated liability balances: Accrued compensation and benefits 79.2 90.7 Accounts payable and accrued expenses 65.3 64.5 Unsettled fund payables 380.9 288.8 Total affiliated liability balances 525.4 444.0

Accounting Policies (Details)

Accounting Policies (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Available for sale investments	$ 11.1		$ 85.2
Net cash provided by/(used in) investing activities	(297.8)	$ (43.8)
Net cash provided by/(used in) operating activities	(52.2)	126.5
Payments for Repurchase of Common Stock	39.3	52.5
Cash and Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect, CIP		195.6
Operating Income (Loss)	(321.1)	(257.9)
Other gains and losses, net	$ (5.4)	6.9
Accounting Standards Update 2016-01 [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption			0
Accounting Standards Update 2016-15 [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Net cash provided by/(used in) investing activities		(6.2)
Net cash provided by/(used in) operating activities		6.2
Accounting Standards Update 2017-07 [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Operating Income (Loss)		$ 0.7
Retained Earnings | Accounting Standards Update 2016-01 [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption			$ 3.2

Accounting Policies Impact of a

Accounting Policies Impact of adoption ASU 2014-09 on the Condensed Consolidated Statements of Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Investment Advisory Fees	$ 1,043.7	$ 955.2
Distribution and Servicing Fees	246.1	206.4
Performance Fees	9.1	11.3
Other	56.9	19.7
Total operating revenues	1,355.8	1,192.6
Third party distribution service and advisory	419.1	349.3
Labor and Related Expense	390.4	397.5
Marketing Expense	28.1	24.4
Communications, Information Technology and Occupancy	102.2	85.5
General and Administrative Expense	94.9	78
Total operating expenses	1,034.7	934.7
Operating Income (Loss)	321.1	$ 257.9
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Investment Advisory Fees	1,097.5
Distribution and Servicing Fees	213.7
Performance Fees	9.1
Other	15.9
Total operating revenues	1,336.2
Third party distribution service and advisory	395.3
Labor and Related Expense	390.4
Marketing Expense	28.1
Communications, Information Technology and Occupancy	102.2
General and Administrative Expense	99.1
Total operating expenses	1,015.1
Operating Income (Loss)	321.1
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Investment Advisory Fees	53.8
Distribution and Servicing Fees	(32.4)
Performance Fees	0
Other	(41)
Total operating revenues	(19.6)
Third party distribution service and advisory	(23.8)
Labor and Related Expense	0
Marketing Expense	0
Communications, Information Technology and Occupancy	0
General and Administrative Expense	4.2
Total operating expenses	(19.6)
Operating Income (Loss)	$ 0

Fair Value Of Assets And Liab36

Fair Value Of Assets And Liabilities (Narrative) (Details)	3 Months Ended
	Mar. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Discount Rate	4.47%
Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets under Management, Assumed Growth Rate	(2.34%)
Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets under Management, Assumed Growth Rate	0.74%
Weighted Average [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets under Management, Assumed Growth Rate	(0.03%)

Fair Value Of Assets And Liab37

Fair Value Of Assets And Liabilities (Fair Value Of Financial Instruments Held By Consolidated Investments) (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 1,861.5	$ 2,006.4	$ 1,397
Equity investments	381.4	346.6
Available for sale investments	11.1	85.2
Foreign time deposits	28.7	28.6
Assets held for policyholders	12,902.2	12,444.5
Policyholder payables	(12,902.2)	(12,444.5)
Long-term debt	(2,076.4)	(2,075.8)
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	1,861.5	2,006.4
Available for sale investments	11.1	15.9
Foreign time deposits	28.7	28.6
Assets held for policyholders	12,902.2	12,444.5
Policyholder payables	(12,902.2)	(12,444.5)
Contingent consideration liability	(53.6)	(57.4)
Long-term debt	(2,076.4)	(2,075.8)
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	1,861.5	2,006.4
Available for sale investments	11.1	15.9
Foreign time deposits	28.7	28.6
Assets held for policyholders	12,902.2	12,444.5
Policyholder payables	(12,902.2)	(12,444.5)
Contingent consideration liability	(53.6)	(57.4)
Long-term debt	$ (2,180.2)	$ (2,258.1)

Fair Value Of Assets And Liab38

Fair Value Of Assets And Liabilities (Tri-Level Hierarchy, Carrying Value) (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investments	$ 11.1	$ 85.2
Equity investments	381.4	346.6
Assets held for policyholders	12,902.2	12,444.5
Total	14,112.8	13,682.5
Total	(53.6)	(57.4)
Foreign time deposits	28.7	28.6
Equity method investments	286.6	277.3
Cost method investments	5.8	6.2
Liability [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Obligations, Fair Value Disclosure	(53.6)	(57.4)
Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	818.1	875.5
Seed Money [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments	264.2	243
Deferred Compensation Arrangements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments	98.7	92.3
Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments	18.5	11.3
Collateralized Loan Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investments	4.9	6
Other Debt Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investments	6.2	9.9
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets held for policyholders	12,902.2	12,444.5
Total	14,101.7	13,666.6
Total	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Liability [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Obligations, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	818.1	875.5
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Seed Money [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investments		69.3
Equity investments	264.2	243
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Deferred Compensation Arrangements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments	98.7	92.3
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments	18.5	11.3
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Collateralized Loan Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investments	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Other Debt Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investments	0	0
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets held for policyholders	0	0
Total	4.9	6
Total	0	0
Significant Other Observable Inputs (Level 2) [Member] | Liability [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Obligations, Fair Value Disclosure	0	0
Significant Other Observable Inputs (Level 2) [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Significant Other Observable Inputs (Level 2) [Member] | Seed Money [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments	0	0
Significant Other Observable Inputs (Level 2) [Member] | Deferred Compensation Arrangements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments	0	0
Significant Other Observable Inputs (Level 2) [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments	0	0
Significant Other Observable Inputs (Level 2) [Member] | Collateralized Loan Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investments	4.9	6
Significant Other Observable Inputs (Level 2) [Member] | Other Debt Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investments	0	0
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets held for policyholders	0	0
Total	6.2	9.9
Total	(53.6)	(57.4)
Significant Unobservable Inputs (Level 3) [Member] | Liability [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Obligations, Fair Value Disclosure	(53.6)	(57.4)
Significant Unobservable Inputs (Level 3) [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) [Member] | Seed Money [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments	0	0
Significant Unobservable Inputs (Level 3) [Member] | Deferred Compensation Arrangements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments	0	0
Significant Unobservable Inputs (Level 3) [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments	0	0
Significant Unobservable Inputs (Level 3) [Member] | Collateralized Loan Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investments	0	0
Significant Unobservable Inputs (Level 3) [Member] | Other Debt Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale investments	$ 6.2	$ 9.9

Fair Value Of Assets And Liab39

Fair Value Of Assets And Liabilities (Reconciliation Of Balance, Fair Value Measurement, Level 3) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Beginning balance (Assets)	$ 8,955.6
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Purchases (Assets)	0	$ (15.1)
Gains and losses included in the Condensed Consolidated Statements of Income	(5.7)	(1)
Sales (Asset)	(0.7)	0
Ending balance (Asset)	81.2	54.8
Liability [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Beginning balance (Liability)	(57.4)	(78.2)
Purchases (Liability)		0
Net unrealized gains and losses included in other gains and losses	0.4	0.5
Settlements (Liability)	3.4	3.6
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease)	0
Ending balance (Liability)	(53.6)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3		0
Collateralized Loan Obligations [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Beginning balance (Assets)		12.9
Purchases (Assets)		0
Gains and losses included in the Condensed Consolidated Statements of Income		0
Sales (Asset)		0
Ending balance (Asset)		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		12.9
Other Debt Obligations [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Beginning balance (Assets)	9.9	13.2
Purchases (Assets)		(7.3)
Gains and losses included in the Condensed Consolidated Statements of Income	(3.2)	0
Sales (Asset)	0	(7.6)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease)	0.5
Ending balance (Asset)	$ 6.2	12.9
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		0
Liability [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Ending balance (Liability)		$ (74.1)

Investments (Narrative) (Detail

Investments (Narrative) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2017fund
Schedule of Available-for-sale Securities [Line Items]
Number of affiliated funds holding seed money | fund			50
Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Unrealized Gain (Loss) on Investments | $	$ 0.2	$ 4.8

Investments (Details Of Company

Investments (Details Of Company Investments) (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Investment Holdings [Line Items]
Available for sale investments	$ 11.1	$ 85.2
Equity method investments	286.6	277.3
Foreign time deposits	28.7	28.6
Cost Method Investments	5.8	6.2
Investments	713.6	674.6
Seed Money [Member]
Investment Holdings [Line Items]
Equity Investments	98.7	92.3
Collateralized Loan Obligations [Member]
Investment Holdings [Line Items]
Available for sale investments	4.9	6
Other Debt Obligations [Member]
Investment Holdings [Line Items]
Available for sale investments	6.2	9.9
Deferred Compensation Arrangements [Member]
Investment Holdings [Line Items]
Equity Investments	264.2	243
Common Stock [Member]
Investment Holdings [Line Items]
Equity Investments	$ 18.5	$ 11.3

Investments (Realized Gains Los

Investments (Realized Gains Losses Available-For-Sale Securities) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Proceeds from Sales	$ 2.8	$ 43.8
Gross Realized Gains	0	1.9
Gross Realized Losses	(0.1)	(1.3)
Seed Money [Member]
Schedule of Available-for-sale Securities [Line Items]
Proceeds from Sales		34.2
Gross Realized Gains		1.6
Gross Realized Losses		(1.3)
Collateralized Loan Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Proceeds from Sales	2.6	2
Gross Realized Gains	0	0.3
Gross Realized Losses	0	0
Other Debt Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Proceeds from Sales	0.2	7.6
Gross Realized Gains	0	0
Gross Realized Losses	$ (0.1)	$ 0

Investments (Gross Unrealized H

Investments (Gross Unrealized Holding Gains And Losses Recognized In Other Accumulated Comprehensive Income From Available-For-Sale Investments) (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Cost	$ 9.9	$ 79.9
Gross Unrealized Holding Gains	1.4	6.6
Gross Unrealized Holding Losses	(0.2)	(1.3)
Available for sale investments	11.1	85.2
Seed Money [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost		65.1
Gross Unrealized Holding Gains		5.5
Gross Unrealized Holding Losses		(1.3)
Available for sale investments		69.3
CLO [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	3.5	4.9
Gross Unrealized Holding Gains	1.4	1.1
Gross Unrealized Holding Losses	0	0
Available for sale investments	4.9	6
Other Debt Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	6.4	9.9
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	(0.2)	0
Available for sale investments	$ 6.2	$ 9.9

Investments (Breakdown Of Avail

Investments (Breakdown Of Available-For-Sale Investments With Unrealized Losses) (Details) - Seed Money Funds [Member] $ in Millions	Dec. 31, 2017USD ($)
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	$ 9.4
Less than 12 Months, Gross Unrealized Losses	(0.8)
12 Months or Greater, Fair Value	15
12 Months or Greater, Gross Unrealized Losses	(0.5)
Total, Fair Value	24.4
Total, Gross Unrealized Losses	$ (1.3)

Investments Maturities Of Avail

Investments Maturities Of Available For Sale Debt Securities (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Schedule of Held-to-maturity Securities [Line Items]
Available-for-sale Securities, Debt Securities	$ 11.1	$ 85.2
Available-for-sale Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	6.2
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	0.5
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	4.4
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	0
Available-for-sale Securities, Debt Securities	$ 11.1

Long-Term Debt (Schedule Of Lon

Long-Term Debt (Schedule Of Long-Term Debt Instruments) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Line of Credit Facility, Expiration Date	Aug. 7, 2020
Unsecured Debt [Member] | Due November 30, 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Nov. 30, 2022
Debt instrument, interest rate, stated percentage	3.125%
Debt Instrument, Face Amount	$ 600
Unsecured Debt [Member] | Due January 30, 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Jan. 30, 2024
Debt instrument, interest rate, stated percentage	4.00%
Debt Instrument, Face Amount	$ 600
Unsecured Debt [Member] | Due January 15, 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Jan. 15, 2026
Debt instrument, interest rate, stated percentage	3.75%
Debt Instrument, Face Amount	$ 500
Unsecured Debt [Member] | Due November 30, 2043 [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Nov. 30, 2043
Debt instrument, interest rate, stated percentage	5.375%
Debt Instrument, Face Amount	$ 400
Carrying Value [Member]
Debt Instrument [Line Items]
Long-term Debt	2,076.4	$ 2,075.8
Carrying Value [Member] | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, amount outstanding	0	0
Carrying Value [Member] | Unsecured Debt [Member] | Due November 30, 2022 [Member]
Debt Instrument [Line Items]
Long-term Debt	597	596.9
Carrying Value [Member] | Unsecured Debt [Member] | Due January 30, 2024 [Member]
Debt Instrument [Line Items]
Long-term Debt	594.3	594
Carrying Value [Member] | Unsecured Debt [Member] | Due January 15, 2026 [Member]
Debt Instrument [Line Items]
Long-term Debt	495.2	495.1
Carrying Value [Member] | Unsecured Debt [Member] | Due November 30, 2043 [Member]
Debt Instrument [Line Items]
Long-term Debt	389.9	389.8
Fair Value [Member]
Debt Instrument [Line Items]
Long-term Debt	2,180.2	2,258.1
Fair Value [Member] | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, amount outstanding	0	0
Fair Value [Member] | Unsecured Debt [Member] | Due November 30, 2022 [Member]
Debt Instrument [Line Items]
Long-term Debt	603.6	608.8
Fair Value [Member] | Unsecured Debt [Member] | Due January 30, 2024 [Member]
Debt Instrument [Line Items]
Long-term Debt	617.9	634.7
Fair Value [Member] | Unsecured Debt [Member] | Due January 15, 2026 [Member]
Debt Instrument [Line Items]
Long-term Debt	501.4	515
Fair Value [Member] | Unsecured Debt [Member] | Due November 30, 2043 [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 457.3	$ 499.6

Long-Term Debt (Narrative) (Det

Long-Term Debt (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Letter of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Capacity Available for Trade Purchases	$ 10.1
Letters of credit, renewable term	1 year
Carrying Value [Member]
Line of Credit Facility [Line Items]
Long-term Debt	$ 2,076.4	$ 2,075.8
Carrying Value [Member] | Line of Credit
Line of Credit Facility [Line Items]
Line of credit facility, amount outstanding	$ 0	0
Due November 30, 2022 [Member] | Unsecured Debt [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.125%
Debt Instrument, Face Amount	$ 600
Due November 30, 2022 [Member] | Carrying Value [Member] | Unsecured Debt [Member]
Line of Credit Facility [Line Items]
Long-term Debt	$ 597	$ 596.9

Share Capital (Movements In Sha

Share Capital (Movements In Shares Issued And Outstanding) (Details) - shares shares in Millions	Mar. 31, 2018	Dec. 31, 2017
Equity [Abstract]
Common shares issued	490.4	490.4
Less: Treasury shares for which dividend and voting rights do not apply	(79.6)	(83.3)
Common shares outstanding	410.8	407.1

Other Comprehensive Income_(L49

Other Comprehensive Income/(Loss) (Accumulated other comprehensive income) (Details) £ in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018USD ($)	Mar. 31, 2017USD ($)	Mar. 31, 2018GBP (£)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income, Other, Net of Tax	$ (1.6)	$ 3
Currency translation differences on investments in foreign subsidiaries, net of tax	64.6	62.6
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(391.2)	(809.3)
Other comprehensive income/(loss), net of tax	63	65.6
Ending balance	(331.4)	(743.7)
Foreign currency transaction and translation gain	(6.6)
Foreign currency translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income, Other, Net of Tax	0	0
Currency translation differences on investments in foreign subsidiaries, net of tax	64.6	62.6
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(290.5)	(679.9)
Other comprehensive income/(loss), net of tax	64.6	62.6
Ending balance	(225.9)	(617.3)
Employee benefit plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income, Other, Net of Tax	0.4	0.2
Currency translation differences on investments in foreign subsidiaries, net of tax	0	0
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(109.7)	(139.2)
Other comprehensive income/(loss), net of tax	0.4	0.2
Ending balance	(109.3)	(139)
Available-for-sale investments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income, Other, Net of Tax	0.3	2.5
Currency translation differences on investments in foreign subsidiaries, net of tax	0	0
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	4.7	5
Other comprehensive income/(loss), net of tax	0.3	2.5
Ending balance	1.8	7.5
Designated as Hedging Instrument [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Intercompany debt	182.5		£ 130
Equity Method Investments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income, Other, Net of Tax	(2.3)	0.3
Currency translation differences on investments in foreign subsidiaries, net of tax	0	0
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	4.3	4.8
Other comprehensive income/(loss), net of tax	(2.3)	0.3
Ending balance	2	$ 5.1
Accounting Standards Update 2016-01 [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income	(3.2)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(394.4)
Accounting Standards Update 2016-01 [Member] | Foreign currency translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income	0
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(290.5)
Accounting Standards Update 2016-01 [Member] | Employee benefit plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income	0
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(109.7)
Accounting Standards Update 2016-01 [Member] | Available-for-sale investments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income	(3.2)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	1.5
Accounting Standards Update 2016-01 [Member] | Equity Method Investments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income	0
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 4.3

Revenue (Details)

Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Revenue, Major Customer [Line Items]
Total operating revenues	$ 1,355.8	$ 1,192.6
Deferred Revenue	60.4		$ 60.4
North America [Member]
Revenue, Major Customer [Line Items]
Total operating revenues	818
EMEA [Member]
Revenue, Major Customer [Line Items]
Total operating revenues	469.9
Asia Pacific [Member]
Revenue, Major Customer [Line Items]
Total operating revenues	$ 67.9

Share-Based Compensation (Narra

Share-Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 40.9	$ 49.2
Fair value of vested shares	$ 142.7	$ 145.9
Weighted average fair value of shares granted (usd per share)	$ 32.55	$ 32.19
Unrecognized compensation cost related to non-vested shares	$ 403.2
Weighted average non-vested shares compensation cost expected to recognize	2 years 11 months 6 days

Share-Based Compensation (Movem

Share-Based Compensation (Movements On Share Awards) (Details) - $ / shares shares in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Unvested at beginning of year Weighted Average Grant Date Fair Value (usd per share)	$ 31.52
Granted during period Weighted Average Grant Date Fair Value (usd per share)	32.55	$ 32.19
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	31.74
Vested and distributed during the period Weighted Average Grant Date Fair Value (usd per share)	32.17
Unvested at the end of the year Weighted Average Grant Date Fair Value (usd per share)	$ 31.72
Time Vested N y s e [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Unvested at the beginning of year (shares)	12	12.1
Granted during the year (shares)	5.1	5.1
Forfeited during the period (shares)	(0.1)	(0.3)
Vested and distributed during the year (shares)	(4.2)	(4.4)
Unvested at the end of the year (shares)	12.8	12.5
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Unvested at the beginning of year (shares)	0.9	0.8
Granted during the year (shares)	0.4	0.3
Forfeited during the period (shares)	0	0
Vested and distributed during the year (shares)	(0.3)	(0.2)
Unvested at the end of the year (shares)	1	0.9

Taxation (Narrative) (Details)

Taxation (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits	$ 19.6	$ 19.2
Provisional Income Tax Expense (Benefit)	$ (130.7)

Earnings Per Share (Narrative)

Earnings Per Share (Narrative) (Details) - shares shares in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Contingently issuable share excluded	0.1	0.2
Performance Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	0

Earnings Per Share (Calculation

Earnings Per Share (Calculation Of Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share [Abstract]
Income from continuing operations, net of taxes	$ 265.2	$ 214.2
Net (income)/loss attributable to noncontrolling interests in consolidated entities	(11.3)	(2.2)
Net income attributable to Invesco Ltd	253.9	212
Allocation of earnings to restricted shares	(7.5)	(6.4)
Net income attributable to common shareholders	$ 246.4	$ 205.6
Weighted average shares outstanding - basic (in shares)	411.3	407.7
Weighted Average Number of Shares, Restricted Stock	(12.2)	(12.2)
Weighted Average Number of Shares Outstanding, Basic - Common shares	399.1	395.5
Dilutive effect on share-based awards (in shares)	0.5	0.3
Weighted Average Number of Shares Outstanding, Diluted - Common shares	399.6	395.8
Weighted average shares outstanding - diluted (in shares)	411.8	408
Earnings per share:
Basic earnings per share (usd per share)	$ 0.62	$ 0.52
Diluted earnings per share:
Diluted earnings per share (usd per share)	$ 0.62	$ 0.52

Commitments And Contingencies (

Commitments And Contingencies (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Loss Contingencies [Line Items]
Undrawn capital and purchase commitments	$ 298.8	$ 292.8

Consolidated Investment Produ57

Consolidated Investment Products (Narrative) (Details)	3 Months Ended
	Mar. 31, 2018USD ($)variable_interest_entity	Mar. 31, 2017USD ($)	Dec. 31, 2017USD ($)
Variable Interest Entity [Line Items]
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	$ 242,700,000
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	$ 242,700,000		$ 227,300,000
Number of entities no longer consolidated | variable_interest_entity	2
Gain (loss) on deconsolidation	$ 0	$ 0
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	$ 5,700,000
Pay interest at Libor or Euribor plus	11.00%
Collateral assets, default percentage	1.00%
Notes issued by collateralized loan obligations terms of arrangements interest rate margin spread low	0.92%
Notes issued by collateralized loan obligations terms of arrangements interest rate margin spread high	8.25%
CLO [Member]
Variable Interest Entity [Line Items]
Weighted average maturity (years)	10 years
Bank Loan Obligations [Member]
Variable Interest Entity [Line Items]
CLO Collateral Assets	$ 4,693,500,000		4,894,200,000
Senior Secured Bank Loans And Bonds [Member] | CLO [Member]
Variable Interest Entity [Line Items]
Fair value, option, aggregate differences, long-term debt instruments	52,800,000		$ 84,600,000
Consolidation, Eliminations [Member] | Bank Loan Obligations [Member] | CLO [Member]
Variable Interest Entity [Line Items]
CLO Collateral Assets	$ 4,656,500,000

Consolidated Investment Produ58

Consolidated Investment Products (Balances Related To CIP) (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Consolidated Investment Products [Abstract]
Cash and cash equivalents of CIP	$ 260.8	$ 511.3	$ 535.7
Accounts receivable and other assets of CIP	157.5	131.5
Investments Of Consolidated Investment Products	5,453.5	5,658
Less: Debt of CIP	(4,502.7)	(4,799.8)
Less: Other liabilities of CIP	(349.5)	(498.8)
Less: Retained earnings	16	16.7
Less: Accumulated other comprehensive income, net of tax	(15.9)	(16.6)
Less: Redeemable Noncontrolling Interest, Consolidated Investment Products	(281)	(243.2)
Less: Equity attributable to nonredeemable noncontrolling interests	(293.7)	(258.6)
Invesco's net interests in CIP	$ 445	$ 500.5

Consolidated Investment Produ59

Consolidated Investment Products (Condensed Consolidating Statement Of Income Line Items Reflecting Impact Of Consolidation Of Investment Products Into The Condensed Consolidated Statements Of Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Total operating revenues	$ 1,355.8	$ 1,192.6
Total operating expenses	1,034.7	934.7
Operating Income (Loss)	321.1	257.9
Equity in earnings of unconsolidated affiliates	9.7	17.7
Interest and dividend income	4.2	2.9
Other gains and losses, net	(5.4)	6.9
Other gains/(losses) of CIP, net	27.2	28.5
Income before income taxes	333.6	289.9
Income tax provision	(68.4)	(75.7)
Net income	265.2	214.2
(Gains)/losses attributable to noncontrolling interests in consolidated entities, net	(11.3)	(2.2)
Net income attributable to Invesco Ltd	253.9	212
Impact of CIP [Member]
Total operating revenues	(7)	(13.2)
Total operating expenses	3.2	(1.2)
Operating Income (Loss)	(10.2)	(12)
Equity in earnings of unconsolidated affiliates	(4.2)	1.5
Other gains and losses, net	(0.9)	(10.1)
Interest and dividend income of CIP	57.8	53.8
Interest expense of CIP	(39.4)	(36.2)
Other gains/(losses) of CIP, net	8.8	10.9
Income before income taxes	11.9	7.9
Income tax provision	0	0
Net income	11.9	7.9
(Gains)/losses attributable to noncontrolling interests in consolidated entities, net	(11.3)	(2.2)
Net income attributable to Invesco Ltd	$ 0.6	$ 5.7

Consolidated Investment Produ60

Consolidated Investment Products (VIE Balance Sheets Consolidated In Period) (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Variable Interest Entity [Line Items]
Cash and cash equivalents of CIP	$ 260.8	$ 511.3	$ 535.7
Accounts receivable and other assets of CIP	157.5	131.5
Investments of CIP	5,453.5	5,658
Total assets	31,619.1	31,668.8
Debt of CIP	4,502.7	4,799.8
Other liabilities of CIP	349.5	498.8
Total liabilities	22,148.1	22,470
Total equity	9,190	8,955.6	7,833.2	$ 7,611.8
Total liabilities and equity	31,619.1	$ 31,668.8
CLOs - VIEs [Member]
Variable Interest Entity [Line Items]
Cash and cash equivalents of CIP	39.3		10.9
Accounts receivable and other assets of CIP	8.3		3.2
Investments of CIP	339.9		139.9
Total assets	387.5		154
Debt of CIP	375.3		0
Other liabilities of CIP	3.2		1.9
Total liabilities	378.5		1.9
Total equity	9		152.1
Total liabilities and equity	$ 387.5		154
VOEs [Member]
Variable Interest Entity [Line Items]
Cash and cash equivalents of CIP			0
Accounts receivable and other assets of CIP			0.2
Investments of CIP			49.8
Total assets			50
Debt of CIP			0
Other liabilities of CIP			0
Total liabilities			0
Total equity			50
Total liabilities and equity			50
Consolidated Entities [Member] | CLOs - VIEs [Member]
Variable Interest Entity [Line Items]
Cash and cash equivalents of CIP			8.2
Accounts receivable and other assets of CIP			1.3
Investments of CIP			45.8
Total assets			55.3
Debt of CIP			15.1
Other liabilities of CIP			13.7
Total liabilities			28.8
Total equity			26.5
Total liabilities and equity			$ 55.3

Consolidated Investment Produ61

Consolidated Investment Products (Fair Value Hierarchy Levels Of Investments Held And Notes Issued By Consolidated Investment Products) (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Real Estate Investments, Net	$ 81.2	$ 76.2
Investments Of Consolidated Investment Products	5,453.5	5,658
Fair Value, Inputs, Level 1 [Member]
Real Estate Investments, Net	0	0
Investments Of Consolidated Investment Products	215.7	217.8
Significant Other Observable Inputs (Level 2) [Member]
Real Estate Investments, Net	0	0
Investments Of Consolidated Investment Products	4,991.5	5,200.6
Significant Unobservable Inputs (Level 3) [Member]
Real Estate Investments, Net	81.2	76.2
Investments Of Consolidated Investment Products	81.2	76.2
Bank Loans [Member]
CLO Collateral Assets	4,693.5	4,894.2
Bank Loans [Member] | Fair Value, Inputs, Level 1 [Member]
CLO Collateral Assets	0	0
Bank Loans [Member] | Significant Other Observable Inputs (Level 2) [Member]
CLO Collateral Assets	4,693.5	4,894.2
Bank Loans [Member] | Significant Unobservable Inputs (Level 3) [Member]
CLO Collateral Assets	0	0
Bonds [Member]
CLO Collateral Assets	296.3	302
Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
CLO Collateral Assets	0	0
Bonds [Member] | Significant Other Observable Inputs (Level 2) [Member]
CLO Collateral Assets	296.3	302
Bonds [Member] | Significant Unobservable Inputs (Level 3) [Member]
CLO Collateral Assets	0	0
Equity Securities [Member]
CLO Collateral Assets	198.2	203.2
Private Equity Fund Assets	19.2	19
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
CLO Collateral Assets	196.5	198.8
Private Equity Fund Assets	19.2	19
Equity Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
CLO Collateral Assets	1.7	4.4
Private Equity Fund Assets	0	0
Equity Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
CLO Collateral Assets	0	0
Private Equity Fund Assets	0	0
Private Equity Funds [Member]
Private Equity Fund Assets	165.1	163.4
Private Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Private Equity Fund Assets	0	0
Private Equity Funds [Member] | Significant Other Observable Inputs (Level 2) [Member]
Private Equity Fund Assets	0	0
Private Equity Funds [Member] | Significant Unobservable Inputs (Level 3) [Member]
Private Equity Fund Assets	0	0
Investments Measured at NAV [Member]
Real Estate Investments, Net	0	0
Investments Of Consolidated Investment Products	165.1	163.4
Investments Measured at NAV [Member] | Bank Loans [Member]
CLO Collateral Assets	0	0
Investments Measured at NAV [Member] | Bonds [Member]
CLO Collateral Assets	0	0
Investments Measured at NAV [Member] | Equity Securities [Member]
CLO Collateral Assets	0	0
Private Equity Fund Assets	0	0
Investments Measured at NAV [Member] | Private Equity Funds [Member]
Private Equity Fund Assets	$ 165.1	$ 163.4

Consolidated Investment Produ62

Consolidated Investment Products (Beginning And Ending Fair Value Measurements For Level 3 Assets And Liabilities) (Details) - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance (Asset)	$ 81.2	$ 54.8	$ 76.2	$ 40.7
Purchases (Asset)	0	15.1
Sales (Asset)	(0.7)	0
Ending balance (Asset)	81.2	54.8
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gains and losses included in the Condensed Consolidated Statements of Income	$ 5.7	$ 1

Consolidated Investment Produ63

Consolidated Investment Products (Level 3 Valuation Techniques) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Real Estate Investments, Net	$ 81.2	$ 76.2
Fair Value Inputs, Discount Rate	4.47%
Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Real Estate Investments, Net	$ 81.2	$ 76.2
Discounted Cash Flow Valuation Technique [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	7.00%	7.00%
Fair Value Inputs, Cap Rate	4.25%	5.30%
Fair Value Inputs, Long-term Revenue Growth Rate	2.00%	2.00%
Discounted Cash Flow Valuation Technique [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	25.00%	33.00%
Fair Value Inputs, Cap Rate	4.25%	5.30%
Fair Value Inputs, Long-term Revenue Growth Rate	3.00%	3.00%
Discounted Cash Flow Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Discount Rate	15.00%	17.00%
Fair Value Inputs, Cap Rate	4.25%	5.30%
Fair Value Inputs, Long-term Revenue Growth Rate	2.50%	2.50%

Consolidated Investment Produ64

Consolidated Investment Products (Investments Measured at NAV as a practical expedient) (Details) - Private Equity Funds [Member] - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Schedule of Investments [Line Items]
Investment Owned, at Fair Value	$ 165.1	$ 163.4
Unfunded Commitments	$ 39.2	$ 53.9
Weighted Average Remaining Term	5 years 11 months	5 years 6 months

Related Parties (Details)

Related Parties (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Investment Advisory Fees	$ 1,043.7	$ 955.2
Distribution and Servicing Fees	246.1	206.4
Performance Fees	9.1	11.3
Revenue, Other Financial Services	56.9	19.7
Revenues	1,355.8	1,192.6
Cash and cash equivalents	1,861.5	1,397	$ 2,006.4
Unsettled fund receivables	837.6		793.8
Accounts receivable	595		622.5
Investments	713.6		674.6
Separate Account Assets	12,902.2		12,444.5
Other assets	64.5		61.7
Total assets	31,619.1		31,668.8
Accrued compensation and benefits	371.6		696.1
Accounts payable and accrued expenses	820.8		895.7
Unsettled fund payables	811.5		783.8
Total liabilities	22,148.1		22,470
Affiliated Entity [Member]
Investment Advisory Fees	916.1	832.1
Distribution and Servicing Fees	245.3	206.1
Performance Fees	4.1	8.3
Revenue, Other Financial Services	54.8	16.8
Revenues	1,220.3	$ 1,063.3
Cash and cash equivalents	818.1		875.5
Unsettled fund receivables	387.1		204
Accounts receivable	349.8		359.9
Investments	646		608.5
Separate Account Assets	12,901.9		12,444.2
Other assets	3.6		9.2
Total assets	15,106.5		14,501.3
Accrued compensation and benefits	79.2		90.7
Accounts payable and accrued expenses	65.3		64.5
Unsettled fund payables	380.9		288.8
Total liabilities	$ 525.4		$ 444

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions	Apr. 26, 2018	Apr. 06, 2018	Mar. 31, 2018	Mar. 31, 2017
Subsequent Event [Line Items]
Dividends declared per share (usd per share)			$ 0.29	$ 0.28
Subsequent Event
Subsequent Event [Line Items]
Dividends declared per share (usd per share)	$ 0.30
Guggenheim Investments' ETF Business | Subsequent Event
Subsequent Event [Line Items]
Payments to Acquire Businesses, Gross		$ 1,200
Guggenheim Investments' ETF Business | Line of Credit | Subsequent Event
Subsequent Event [Line Items]
Line of credit facility, amount outstanding		$ 835