BrightSphere Investment 10-Q 9 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Nov. 06, 2017
Document and Entity Information
Entity Registrant Name	OM Asset Management plc
Entity Central Index Key	1,611,702
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		109,720,358

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Assets
Investments (includes balances reported at fair value of $189.0 and $126.1)	$ 312.1	$ 268.8
Investments, at fair value	245.8	161.6
Total assets	1,439.7	1,294.3
Liabilities and equity
Non-recourse borrowings	33.5	0
Total liabilities	1,293.3	1,123.8
Commitments and contingencies
Equity:
Total equity and redeemable non-controlling interests in consolidated Funds	146.4	170.5
Total liabilities and equity	1,439.7	1,294.3
Consolidated Entity Excluding Consolidated Funds
Assets
Cash and cash equivalents	126.4	101.9
Investment advisory fees receivable	194.6	163.7
Fixed assets, net	41.3	39.8
Investments (includes balances reported at fair value of $189.0 and $126.1)	255.3	233.3
Acquired intangibles, net	79.9	84.9
Goodwill	274.6	272.7
Other assets	32.6	29
Deferred tax assets	367.4	332.7
Liabilities and equity
Accounts payable and accrued expenses	42.8	45.8
Accrued incentive compensation	169.8	132.3
Other amounts due to related parties	111.9	156.3
Other compensation liabilities	429.2	291
Accrued income taxes	96.6	90.2
Third party borrowings	392.6	392.3
Other liabilities	8.8	10.1
Equity:
Ordinary shares (nominal value $0.001; 109,720,358 and 114,157,765 shares, respectively, issued)	0.1	0.1
Shareholders’ equity	153.1	190.2
Accumulated other comprehensive loss	(22.4)	(26.3)
Non-controlling interests	1.2	1
Consolidated Funds
Assets
Other assets	2.5	0.4
Cash and cash equivalents, restricted	8.3	0.4
Investments, at fair value	56.8	35.5
Liabilities and equity
Total liabilities	8.1	5.8
Redeemable non-controlling interests in consolidated Funds	$ 14.4	$ 5.5

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - Consolidated Entity Excluding Consolidated Funds - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Asset fair value	$ 189	$ 126.1
Ordinary shares, nominal value (in dollars per share)	$ 0.001	$ 0.001
Ordinary shares, issued (in shares)	109,720,358	114,157,765

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenue:
Total revenue	$ 223.2	$ 170.8	$ 638.2	$ 476.9
Operating expenses:
Total operating expenses	214.9	130.6	593.5	351.7
Operating income	8.3	40.2	44.7	125.2
Non-operating income and (expense):
Total non-operating income	6.5	1.5	12.7	8.5
Income from continuing operations before taxes	14.8	41.7	57.4	133.7
Income tax expense (benefit)	(5.1)	7.3	1.5	33.8
Income from continuing operations	19.9	34.4	55.9	99.9
Gain (loss) on disposal of discontinued operations, net of tax	0	(0.4)	(0.1)	1.2
Net income	19.9	34	55.8	101.1
Net income attributable to controlling interests	$ 18.7	$ 34	$ 53	$ 101.1
Earnings per share (basic) attributable to controlling interests (in dollars per share)	$ 0.17	$ 0.28	$ 0.47	$ 0.84
Earnings per share (diluted) attributable to controlling interests (in dollars per share)	0.17	0.28	0.47	0.84
Continuing operations earnings per share (basic) attributable to controlling interests (in dollars per share)	0.17	0.28	0.47	0.83
Continuing operations earnings per share (diluted) attributable to controlling interests (in dollars per share)	$ 0.17	$ 0.28	$ 0.47	$ 0.83
Weighted average ordinary shares outstanding (in shares)	109,037,556	119,288,903	111,270,049	119,569,288
Weighted average diluted ordinary shares outstanding (in shares)	109,666,997	119,652,304	111,939,898	119,759,785
Consolidated Entity Excluding Consolidated Funds
Revenue:
Management fees	$ 221.7	$ 171.8	$ 624.1	$ 478.5
Performance fees	0.7	(1.1)	12.1	(1.9)
Other revenue	0.1	0.1	0.6	0.3
Operating expenses:
Compensation and benefits	182.2	100	498.4	272.1
General and administrative expense	27.6	27.2	80.9	71.7
Amortization of acquired intangibles	1.6	0.9	4.9	1
Depreciation and other amortization	3.2		8.5	7.3
Depreciation and amortization		2.5		6.9
Non-operating income and (expense):
Investment income	9.4	5.6	20.5	13.6
Interest income	0.1	0.3	0.5	0.3
Interest expense	(6.4)	(4.4)	(18.2)	(5.4)
Gain (loss) on disposal of discontinued operations, net of tax			(0.1)	1.2
Consolidated Funds
Revenue:
Total revenue	0.7	0	1.4	0
Operating expenses:
Total operating expenses	0.3	0	0.8	0
Non-operating income and (expense):
Net consolidated Funds’ investment gains	3.4	0	9.9	0
Net income attributable to non-controlling interests in consolidated Funds	$ 1.2	$ 0	$ 2.8	$ 0

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net income	$ 19.9	$ 34	$ 55.8	$ 101.1
Other comprehensive income (loss):
Valuation and amortization related to derivative securities, net of tax	0.6	(1.1)	1.3	(20.8)
Foreign currency translation adjustment	0.9	(0.3)	2.6	(1.4)
Total other comprehensive income (loss)	1.5	(1.4)	3.9	(22.2)
Total comprehensive income attributable to controlling interests	20.2	32.6	56.9	78.9
Consolidated Funds
Other comprehensive income (loss):
Comprehensive income attributable to non-controlling interests in consolidated Funds	$ 1.2	$ 0	$ 2.8	$ 0

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Changes in Shareholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Consolidated Entity Excluding Consolidated Funds	Consolidated Funds	Ordinary sharesConsolidated Entity Excluding Consolidated Funds	Shareholders’ equity (deficit)Consolidated Entity Excluding Consolidated Funds	Accumulated other comprehensive income (loss)Consolidated Entity Excluding Consolidated Funds	Total shareholders’ equity (deficit)Consolidated Entity Excluding Consolidated Funds	Non- controlling interestsConsolidated Entity Excluding Consolidated Funds
Beginning balance (in shares) at Dec. 31, 2015				120.5
Beginning balance at Dec. 31, 2015	$ 165.9			$ 0.1	$ 168.6	$ (2.8)	$ 165.9	$ 0
Increase (Decrease) in Stockholders' Equity
Issuance of ordinary shares (in shares)				0.5
Repurchase of ordinary shares (in shares)				(0.9)
Repurchase of ordinary shares	(12.2)	$ (12.2)			(12.2)
Equity-based compensation	9.7				9.7		9.7
Foreign currency translation adjustment	(1.4)					(1.4)	(1.4)
Valuation and amortization related to derivative securities, net of tax	(20.8)					(20.8)	(20.8)
Business acquisition	0.9							0.9
Dividends to shareholders	(10.1)				(10.1)		(10.1)
Dividends to related parties	(19)				(19)		(19)
Net income	101.1				101.1		101.1
Ending balance (in shares) at Sep. 30, 2016				120.1
Ending balance at Sep. 30, 2016	214.1			$ 0.1	238.1	(25)	213.2	0.9
Beginning balance at Dec. 31, 2015			$ 0
Increase (Decrease) in redeemable non-controlling interest in consolidated Funds
Net consolidation of Funds	5.7
Ending balance at Sep. 30, 2016			5.7
Beginning balance at Dec. 31, 2015	165.9
Increase (Decrease) in total equity and redeemable non-controlling interest in consolidated Funds
Issuance of ordinary shares	0
Repurchase of ordinary shares	(12.2)
Equity-based compensation	9.7
Foreign currency translation adjustment	(1.4)
Amortization related to derivative securities, net of tax	(20.8)
Permanent and Temporary Equities Noncontrolling Interest Decrease from Deconsolidation	5.7
Dividends to shareholders	(10.1)
Dividends to related parties	(19)
Net income	101.1
Ending balance at Sep. 30, 2016	219.8
Beginning balance (in shares) at Dec. 31, 2016				114.1
Beginning balance at Dec. 31, 2016	165			$ 0.1	190.2	(26.3)	164	1
Increase (Decrease) in Stockholders' Equity
Issuance of ordinary shares (in shares)				0.6
Repurchase of ordinary shares (in shares)				(5)
Repurchase of ordinary shares	(73.1)				(73.1)		(73.1)
Capital contributions (redemptions)	(0.7)				(0.7)		(0.7)
Equity-based compensation	12.8				12.8		12.8
Foreign currency translation adjustment	2.6					2.6	2.6
Valuation and amortization related to derivative securities, net of tax	1.3					1.3	1.3
Business acquisition	0.2							0.2
Dividends to shareholders	(20.2)				(20.2)		(20.2)
Dividends to related parties	(8.9)				(8.9)		(8.9)
Net income	53				53		53
Ending balance (in shares) at Sep. 30, 2017				109.7
Ending balance at Sep. 30, 2017	132			$ 0.1	$ 153.1	$ (22.4)	$ 130.8	$ 1.2
Beginning balance at Dec. 31, 2016			5.5
Increase (Decrease) in redeemable non-controlling interest in consolidated Funds
Net consolidation of Funds			1.3
Capital contributions (redemptions)			4.8
Net income			2.8
Ending balance at Sep. 30, 2017			$ 14.4
Beginning balance at Dec. 31, 2016	170.5
Increase (Decrease) in total equity and redeemable non-controlling interest in consolidated Funds
Issuance of ordinary shares	0
Repurchase of ordinary shares	(73.1)
Capital contributions (redemptions)	4.1
Equity-based compensation	12.8
Foreign currency translation adjustment	2.6
Amortization related to derivative securities, net of tax	1.3
Permanent and Temporary Equities Noncontrolling Interest Decrease from Deconsolidation	1.3
Dividends to shareholders	(20.2)
Dividends to related parties	(8.9)
Net income	55.8
Ending balance at Sep. 30, 2017	$ 146.4

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income	$ 55.8	$ 101.1
Adjustments to reconcile net income to net cash provided by (used in) operating activities from continuing operations:
(Gain) loss on disposal of discontinued operations, excluding consolidated Funds	0.1	(1.2)
Changes in operating assets and liabilities (excluding discontinued operations):
Net cash flows from operating activities of continuing operations	171.4	58.3
Net cash flows from operating activities of discontinued operations	0	0.3
Total net cash flows from operating activities	171.4	58.6
Cash flows from investing activities:
Consolidation (de-consolidation) of Funds	7.3	0.5
Net cash flows from investing activities of continuing operations	(24.6)	(276.1)
Net cash flows from investing activities of discontinued operations	0	0
Total net cash flows from investing activities	(24.6)	(276.1)
Cash flows from financing activities:
Net cash flows from financing activities of continuing operations	(114.4)	232.9
Net cash flows from financing activities of discontinued operations	0	0
Total net cash flows from financing activities	(114.4)	232.9
Net increase (decrease) in cash and cash equivalents	32.4	15.4
Cash and cash equivalents at beginning of period	102.3	135.9
Cash and cash equivalents at end of period (including cash at consolidated Funds classified as restricted)	134.7	151.3
Supplemental disclosure of cash flow information:
Interest paid (excluding consolidated Funds)	20.4	2.1
Income taxes paid	32.8	14.1
Consolidation (de-consolidation) of Funds	1.3	5.7
Consolidated Entity Excluding Consolidated Funds
Adjustments to reconcile net income to net cash provided by (used in) operating activities from continuing operations:
(Gain) loss on disposal of discontinued operations, excluding consolidated Funds	0.1	(1.2)
Amortization of acquired intangibles	4.9	1
Depreciation and other amortization	8.5	7.3
Amortization of debt-related costs	2.3	0
Amortization and revaluation of non-cash compensation awards	144.7	19.7
Net earnings from Affiliates accounted for using the equity method	(11.2)	(11.8)
Distributions received from equity method Affiliates	15	2.3
Deferred income taxes	(35.7)	16.5
(Gains) losses on other investments	(28.4)	(4.3)
Changes in operating assets and liabilities (excluding discontinued operations):
(Increase) decrease in investment advisory fees receivable and other amounts due from related parties	(31)	(0.3)
(Increase) decrease in other receivables, prepayments, deposits and other assets	(0.8)	(2)
Increase (decrease) in accrued incentive compensation, other amounts due to related parties and other liabilities	45.5	(36)
Increase (decrease) in accounts payable, accrued expenses and accrued income taxes	3.5	(34)
Net cash flows from operating activities of continuing operations	170.4	58.3
Cash flows from investing activities:
Purchase of fixed assets	(10)	(9.5)
Business acquisitions, net of cash acquired	(1.9)	(219)
Purchase of investment securities	(80.9)	(58.6)
Sale of investment securities	66.1	10.5
Cash flows from financing activities:
Proceeds from third party and non-recourse borrowings	68.5	450.1
Repayment of third party borrowings	(35)	(148)
Payment to OM plc for deferred tax arrangement	(45.5)	(22.7)
Payment to OM plc for co-investment redemptions	(4.4)	(5.4)
Dividends paid to shareholders	(20.1)	(9.9)
Dividends paid to related parties	(8.9)	(19)
Repurchases of ordinary shares	(73.8)	(12.2)
Consolidated Funds
Cash flows from operating activities:
Less: Net income attributable to non-controlling interests in consolidated Funds	(2.8)	0
Adjustments to reconcile net income to net cash provided by (used in) operating activities from continuing operations:
(Gains) losses on other investments	(2.2)	0
Changes in operating assets and liabilities (excluding discontinued operations):
(Increase) decrease in receivables other assets	0.1	0
Increase (decrease) in accounts payable and other liabilities	0.3	0
Net cash flows from operating activities of continuing operations	1	0
Cash flows from investing activities:
Purchase of investment securities	(49.2)	0
Redemption of investments	44	0
Cash flows from financing activities:
Redeemable non-controlling interest capital raised	$ 4.8	$ 0

Organization and Description of

Organization and Description of the Business	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Description of the Business	OM Asset Management plc (“OMAM” or the “Company”), through its subsidiaries, is a global asset management business with interests in a diverse group of boutique investment management firms (the “Affiliates”) individually headquartered in the United States. The Company provides investment management services globally to predominantly institutional investors, in asset classes that include U.S. and global equities, fixed income, alternative assets, real estate, timber and secondary Funds. Fees for services are largely asset-based and, as a result, the Company’s revenue fluctuates based on the performance of financial markets and investors’ asset flows in and out of the Company’s products. The Company’s Affiliates are organized as limited liability companies. The Company generally utilizes a profit-sharing model in structuring its compensation and ownership arrangements with Affiliates. The Affiliates’ variable compensation is generally based on each firm’s profitability. OMAM and Affiliate key employees share in profits after variable compensation according to their respective ownership interests. The profit-sharing model results in alignment of OMAM and Affiliate key employee economic interests, which is critical to the Company’s talent management strategy and long-term growth of the business. The Company operates in one reportable segment. Until May 19, 2017, the Company was a majority-owned subsidiary of Old Mutual plc (“OM plc”), an international long-term savings, protection and investment group, listed on the London Stock Exchange. On October 15, 2014 , the Company completed the initial public offering (the “Offering”) by OM plc of 22,000,000 ordinary shares of the Company pursuant to the Securities Act of 1933, as amended (“the Securities Act”). Additionally, the underwriters in the Offering exercised a portion of their overallotment option and purchased an additional 2,231,375 shares of the Company from OM plc. On June 22, 2015 , the Company completed a secondary public offering by OM plc of 13,300,000 ordinary shares of the Company pursuant to the Securities Act. Additionally, the underwriters in the secondary public offering exercised their full overallotment option and purchased an additional 1,995,000 shares of the Company from OM plc. On March 11, 2016, OM plc announced the results of a strategic review, which included a plan to separate its underlying businesses, including OMAM. OM plc further announced on December 12, 2016 its intention to continue the reduction of its holdings in OMAM in an orderly manner which balances value, cost, time and risk. On December 16, 2016 , the Company completed a secondary public offering by OM plc of 13,000,000 ordinary shares of the Company pursuant to the Securities Act, along with 6,000,000 ordinary shares purchased and retired by the Company. Additionally, the underwriters in the secondary public offering exercised their full overallotment option and purchased an additional 1,950,000 shares of the Company from OM plc. On May 19, 2017 , the Company completed a secondary public offering by OM plc of 17,300,000 ordinary shares of the Company pursuant to the Securities Act, along with 5,000,000 ordinary shares purchased and retired by the Company. Additionally, the underwriters in the secondary public offering exercised their full overallotment option and purchased an additional 2,595,000 shares of the Company from OM plc. At September 30, 2017 , OM plc owned 20.1% of the Company’s outstanding ordinary shares. On March 25, 2017, OM plc announced that it had agreed to sell a 24.95% shareholding in the Company to HNA Capital US (“HNA”) in a two-step transaction (the “HNA Minority Sale”) for gross cash consideration of approximately $446 million , subject to certain closing conditions. The first tranche of the HNA Minority Sale for 11,414,676 ordinary shares closed on May 12, 2017. On May 24, 2017, OM plc appointed Dr. Guang Yang of HNA as an OM plc director. The Company has been informed by both OM plc and HNA that they are working toward completing the second tranche of the HNA Minority Sale during the fourth quarter of 2017, at which point OM plc's shareholding will reduce to 5.5% and HNA will have the right to appoint two directors to the Company’s board, including Dr. Yang, and OM plc will have no rights to appoint directors.

Basis of Presentation and Signi

Basis of Presentation and Significant Accounting Policies	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies	The Company’s significant accounting policies are as follows: Basis of presentation These unaudited Condensed Consolidated Financial Statements reflect the historical balance sheets, statements of operations and of comprehensive income, statements of changes in shareholders’ equity and statements of cash flows of the Company. Within these Condensed Consolidated Financial Statements, entities that are part of OM plc’s consolidated results, but are not part of OMAM, as defined above, are referred to as “related parties.” The Condensed Consolidated Financial Statements are prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”). All dollar amounts, except per-share data in the text and tables herein, are stated in millions unless otherwise indicated. Transactions between the Company and OM plc are included in the Condensed Consolidated Financial Statements, however material intercompany balances and transactions among the Company and its consolidated Affiliates are eliminated in consolidation. These unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and notes thereto for the year ended December 31, 2016 included in the Company’s Annual Report on Form 10-K as filed with the Securities and Exchange Commission (“SEC”) on February 22, 2017 . The Company’s significant accounting policies, which have been consistently applied, are summarized in those Financial Statements. Consolidation Affiliates The Company evaluates each of its Affiliates and other operating entities to determine the appropriate method of accounting. Generally, majority-owned entities or otherwise controlled investments in which the Company holds a controlling financial interest as the principal shareholder, managing member, or general partner are consolidated. Funds In evaluating whether or not a legal entity must be consolidated, the Company determines if such entity is a variable interest entity (“VIE”) or a voting interest entity (“VOE”). A VOE is considered an entity in which (i) the total equity investment at risk is sufficient to enable the entity to finance its activities independently and (ii) the equity holders at risk have the obligation to absorb losses, the right to receive residual returns, and the right to direct the activities of the entity that most significantly impact the entity’s economic performance. A VIE is an entity that lacks one or more of the characteristics of a VOE. Assessing whether an entity is a VIE or VOE involves judgment and analysis. Factors considered in this assessment include the entity’s legal organization, the entity’s capital structure and equity ownership and any related party or de facto agent implications of the Company’s involvement with the entity. Investments that are determined to be VIEs are consolidated if the Company or a consolidated Affiliate is the primary beneficiary of the investment. VOEs are typically consolidated if the Company holds the majority voting interest or otherwise controls the entity. In the normal course of business, the Company’s Affiliates sponsor and manage certain investment vehicles (the “Funds”). The Company assesses consolidation requirements with respect to its Funds pursuant to Accounting Standards Codification (“ASC”) Topic 810, Consolidation, as amended by Accounting Standards Update 2015-02, Consolidation: Amendments to the Consolidation Analysis ("ASU 2015-02") relating to the consolidation of VIEs. In evaluating whether the Company is the primary beneficiary, the Company evaluates its economic interests in the entity held either directly by the Company or indirectly through related parties. For VIEs that are investment companies subject to ASU 2010-10, Consolidation: Amendments for Certain Investment Funds , the primary beneficiary of the VIE is generally the variable interest holder that absorbs a majority of the expected losses of the VIE, receives a majority of the expected residual returns of the VIE, or both. The Company generally is not the primary beneficiary of Fund VIEs created to manage assets for clients unless the Company’s ownership interest, including interests of related parties, is substantial. The primary beneficiary of a VIE is defined as the variable interest holder that has a controlling financial interest. A controlling financial interest is defined as (i) the power to direct the activities of the VIE that most significantly impacts its economic performance and (ii) the obligation to absorb losses of the entity or the right to receive benefits from the entity that could potentially be significant to the VIE. If no single party satisfies both criteria, but the Company and its related parties satisfy the criteria on a combined basis, then the primary beneficiary is the entity out of the related party group that is most closely associated to the VIE. The consolidation analysis can generally be performed qualitatively, however, if it is not readily apparent that the Company is not the primary beneficiary, a quantitative analysis may also be performed. The Company consolidates VOEs when it has control over significant operating, financial and investing decisions of the entity or holds the majority voting interest. For VOEs organized as limited partnerships or as an entity with governance structures similar to a limited partnership (e.g., limited liability company with a managing member), the Company consolidates an entity when it holds the controlling general partnership interest and the limited partners do not hold substantive participating rights or rights to remove and replace the general partner or rights that could provide the limited partners with the ability to impact the ongoing governance and operating activities of the entity. Upon the occurrence of certain events (such as contributions and redemptions, either by the Company, its Affiliates, or third parties, or amendments to the governing documents of the Company’s investees or sponsored Funds) management reviews and reconsiders its previous conclusion regarding the status of an entity as a VIE or a VOE. Additionally, management continually reconsiders whether the Company is deemed to be a VIE’s primary beneficiary who consolidates such entity. Use of Estimates The preparation of these Condensed Consolidated Financial Statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the period. Actual results could differ significantly from those estimates.

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2017
Business Combinations [Abstract]
Acquisitions	On August 18, 2016, the Company acquired a majority of the equity interests in Landmark Partners, LLC, (“Landmark”) a leading global secondary private equity, real estate and real asset investment firm. The Company acquired a 60% interest in Landmark in exchange for $242.7 million . There is also the potential for an additional payment of up to $225.0 million on or around December 31, 2018, subject to a service and other conditions. The equity interests of Landmark purchased by the Company entitle the Company to participate in the earnings of Landmark. Certain key members of the management team of Landmark retained the remaining 40% interest in Landmark, subject to certain vesting conditions. The Company financed the acquisition through proceeds from multiple note offerings, including $275.0 million of 4.80% senior notes due July 27, 2026 and $125.0 million of 5.125% senior notes due August 1, 2031. The Company accounted for the acquisition of Landmark as a business combination which requires assets acquired and liabilities assumed to be recorded at fair value. The following table presents a summary of the acquisition-date fair values of the assets acquired and liabilities assumed for OMAM’s acquisition of Landmark (in millions): Landmark Purchase price Cash $ 239.2 Seller's expenses 3.5 Total consideration 242.7 Identifiable assets and liabilities Cash 23.4 Receivables 8.5 Indefinite-life trade name 1.0 Amortizable intangible asset management contracts 85.0 Fixed assets 5.1 Other current assets (liabilities), net (26.7 ) Assets (liabilities), net (1.7 ) Total identifiable assets and liabilities 94.6 Goodwill $ 148.1 The primary aspects of the purchase price allocation relate to amortizable intangible asset management contracts, the indefinite-life trade name and goodwill, which is the amount by which the purchase price exceeds the fair value of the net assets acquired. Certain measurement period adjustments were recorded to the provisional values recorded as of December 31, 2016. These adjustments primarily related to updated estimates, which resulted in an increase to the total consideration paid of $0.3 million , a decrease to the fair value of the identifiable net assets acquired of $1.6 million and an increase to the amount recorded to goodwill of $1.9 million . The fair value of the amortizable intangible asset management contracts was determined using the excess earnings method, a form of the income approach. The principle behind the excess earnings method is that the value of the intangible asset is equal to the present value of the after-tax cash flows attributable to the intangible asset only. Excess earnings represent the earnings remaining after applying post-tax contributory asset charges to reflect the return required on other assets that contribute to the generation of the forecast cash flows of the intangible asset. The fair value of the trade name intangible asset was determined utilizing a relief-from-royalty method. The principle behind this method is that the value of the intangible asset is equal to the present value of the after-tax royalty savings attributable to owning the intangible asset. The fair value for all identifiable intangible assets was based on assumptions that market participants would use in pricing an asset, based on the most advantageous market for the asset (i.e., its highest and best use). This fair value estimate could include assets that are not intended to be used, may be sold or are intended to be used in a manner other than their best use. The fair value of the acquired amortizable intangible asset management contracts had a useful life estimate of approximately 13.4 years at acquisition. Purchase price allocated to intangible assets and goodwill is expected to be deductible for U.S. tax purposes over a period of 15 years. Goodwill was calculated as the excess of the fair value of the consideration paid and the values assigned to the identifiable tangible and intangible assets acquired and liabilities assumed. During the nine months ended September 30, 2016, the Company incurred transaction costs of $ 6.1 million related to the acquisition of Landmark. These costs are recorded within general and administrative expense in the Condensed Consolidated Statements of Operations. There were no transaction costs incurred during the nine months ended September 30, 2017 . In conjunction with the acquisition, the Company entered into compensation arrangements with employees of Landmark where pre-acquisition equity units held by Landmark employees became subject to a service condition. These units are accounted for as stock-based compensation, were fair valued as of the closing date of the acquisition and vest over varying increments from December 31, 2018 through December 31, 2024. These units contain put rights that provide liquidity to the employees upon vesting. The aforementioned additional payment of up to $225.0 million could be paid based on the growth of Landmark’s business. This arrangement is also accounted for as stock-based compensation, fair valued as of the closing date of the acquisition, and vests on December 31, 2018. Both the pre-acquisition equity units and the potential future payment are remeasured at the end of each reporting period. The financial results of Landma rk included in the Company’s consolidated financial results for the nine months ended September 30, 2017 , include rev enues of $88.1 million , with $(45.3) million of net loss included in net income attributable to the Company, which includes amortization of inta ngible assets recorded in purchase accounting and compensation expense for the arrangements with the employees of Landmark noted above. Unaudited Pro Forma Financial Information The following unaudited pro forma financial information presents the combined financial results of OMAM and Landmark, as though the acquisition had occurred as of January 1, 2015. The unaudited pro forma financial information reflects certain adjustments for amortization expense related to the fair value of acquired intangible assets, interest expense related to debt incurred to finance the acquisition, amortization related to stock-based compensation arrangements entered into in conjunction with the acquisition, and the income tax impact of the pro forma adjustments. The unaudited pro forma financial information is for informational purposes only and is not necessarily indicative of the financial results that would have been achieved had the acquisition actually occurred at the beginning of the first period presented (in millions, except per-share amounts): Three Months Ended Nine Months Ended Revenues $ 181.3 $ 526.9 Net income attributable to OMAM 26.8 66.3 Net income per share attributable to OMAM shareholders: Basic $0.22 $0.55 Diluted $0.22 $0.55 * The unaudited pro forma financial information originally provided with the Form 10-Q for the period ended September 30, 2016 has been revised to include additional expense estimates that more accurately reflect the combined financial results of OMAM and Landmark.

Investments

Investments	9 Months Ended
	Sep. 30, 2017
Investments [Abstract]
Investments	Investments are comprised of the following as of the dates indicated (in millions): September 30, December 31, Investments of consolidated Funds held at fair value $ 56.8 $ 35.5 Other investments held at fair value 69.0 17.5 Investments related to long-term incentive compensation plans held at fair value 90.4 78.1 Equity-accounted investments in unconsolidated Funds 29.6 30.5 Total investments held at fair value 245.8 161.6 Equity-accounted investments in Affiliates 52.4 55.2 Other investments* 13.9 52.0 Total investments per Condensed Consolidated Balance Sheets $ 312.1 $ 268.8 * Other investments represent cost-basis investments made by one of our Affiliates, including investments in timber and timberlands. At December 31, 2016, $50.1 million of these investments were recorded at the lower of cost or fair value less costs to sell and subsequently sold in January 2017 for a net gain of approximately $1.7 million . In September 2016, the Company purchased approximately $39.6 million of seed investments from OM plc under the terms of the seed capital management agreement, as amended (the “Seed Capital Management Agreement”). In July 2017, the Company purchased all remaining seed capital investments covered by the Seed Capital Management Agreement from OM plc for $63.4 million . OMAM financed this purchase in part through borrowings under a non-recourse seed capital facility collateralized entirely by its seed capital holdings. See Note 8 for a further discussion of borrowings and debt. Following the closing of the first tranche of the HNA Minority Sale, OMAM provided an entity owned by senior professionals of Heitman LLC a right of first offer to buy OMAM’s interest in Heitman LLC at a price the Company determined to be its “good faith estimate of the reasonable value” of such interest. In August 2017, the Company executed a non-binding term sheet to sell its stake in Heitman LLC for cash consideration totaling $110 million . The transaction is expected to close around year-end. The carrying value of OMAM’s interest in Heitman as of September 30, 2017 was $51.0 million and is included in the “Equity-accounted investments in Affiliates” line in the table above. OMAM will retain its co-investment interests in Heitman-managed funds as well as any carried interest associated with these investments. Equity method after-tax income from Heitman represented approximately 11% of GAAP earnings for the first nine months of 2017 and approximately 6% of GAAP earnings of OMAM for the first nine months of 2016. Investment income is comprised of the following for the three and nine months ended September 30 (in millions): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Investment return of equity-accounted investments in unconsolidated Funds $ 0.3 $ 0.2 $ 1.5 $ 0.7 Realized and unrealized gains on other investments held at fair value 3.4 0.7 6.1 0.7 Investment return of held for sale investments — (0.2 ) 1.7 0.4 Total return on OMAM investments 3.7 0.7 9.3 1.8 Investment return of equity-accounted investments in Affiliates 5.7 4.9 11.2 11.8 Total investment income per Condensed Consolidated Statement of Operations $ 9.4 $ 5.6 $ 20.5 $ 13.6

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	The following table summarizes the Company’s assets and liabilities that are measured at fair value on a recurring basis at September 30, 2017 (in millions): Quoted prices in active markets (Level I) Significant other observable inputs (Level II) Significant unobservable inputs (Level III) Uncategorized Total value, Assets of OMAM and consolidated Funds (1) Common and preferred stock $ 56.0 $ — $ — $ — $ 56.0 Short-term investment funds 0.3 — — — 0.3 Derivatives 0.3 0.2 — — 0.5 Consolidated Funds total 56.6 0.2 — — 56.8 Investments in separate accounts (2) 51.5 — — — 51.5 Investments related to long-term incentive compensation plans (3) 90.4 — — — 90.4 Investments in unconsolidated Funds (4) — — — 47.1 47.1 OMAM total 141.9 — — 47.1 189.0 Total fair value assets $ 198.5 $ — $ — $ 47.1 $ 245.8 Liabilities of consolidated Funds (1) Common stock $ (6.5 ) $ — $ — $ — $ (6.5 ) Derivatives (0.3 ) (0.2 ) — — (0.5 ) Consolidated Funds total (6.8 ) (0.2 ) — — (7.0 ) Total fair value liabilities $ (6.8 ) $ (0.2 ) $ — $ — $ (7.0 ) The following table summarizes the Company’s assets and liabilities that are measured at fair value on a recurring basis at December 31, 2016 (in millions): Quoted prices in active markets (Level I) Significant other observable inputs (Level II) Significant unobservable inputs (Level III) Uncategorized Total value December 31, 2016 Assets of OMAM and consolidated Funds (1) Common and preferred stock $ 35.1 $ — $ — $ — $ 35.1 Short-term investment funds 0.4 — — — 0.4 Consolidated Funds total 35.5 — — — 35.5 Investments in separate accounts (2) 7.5 — — — 7.5 Investments related to long-term incentive compensation plans (3) 78.1 — — — 78.1 Investments in unconsolidated Funds (4) — — — 40.5 40.5 OMAM total 85.6 — — 40.5 126.1 Total fair value assets $ 121.1 $ — $ — $ 40.5 $ 161.6 Liabilities of OMAM and consolidated Funds (1) Common stock $ (5.0 ) $ — $ — $ — $ (5.0 ) Consolidated Funds total (5.0 ) — — — (5.0 ) Derivative securities — (0.1 ) — — (0.1 ) OMAM total — (0.1 ) — — (0.1 ) Total fair value liabilities $ (5.0 ) $ (0.1 ) $ — $ — $ (5.1 ) (1) Assets and liabilities measured at fair value are comprised of financial investments managed by the Company's Affiliates. $ 56.8 million in assets and $7.0 million in liabilities at September 30, 2017 and $35.5 million in assets and $5.0 million in liabilities at December 31, 2016 are the result of the consolidation of Funds sponsored by the Company’s Affiliates. The fair value of other investments is estimated based on quoted market prices, dealer quotations or alternative pricing sources supported by observable inputs and therefore classified within Level II. The Company obtains prices from independent pricing services that may utilize broker quotes, but generally the independent pricing services will use various other pricing techniques which take into account appropriate factors such as yield, quality, coupon rate, maturity, type of issue, trading characteristics and other data. The Company has not made adjustments to the prices provided. If the pricing services are only able to (a) obtain a single broker quote or (b) utilize a pricing model, such securities are classified as Level III. If the pricing services are unable to provide prices, the Company attempts to obtain one or more broker quotes directly from a dealer or values such securities at the last bid price obtained. In either case, such securities are classified as Level III. The Company performs due diligence procedures over third party pricing vendors to understand their methodology and controls to support their use in the valuation process to ensure compliance with required accounting disclosures. Equity, short-term investment funds and derivatives which are traded on a national securities exchange are stated at the last reported sales price on the day of valuation. To the extent these securities are actively traded and valuation adjustments are not applied, they are classified as Level I. These securities that trade in markets that are not considered to be active but are valued based on quoted market prices, dealer quotations or alternative pricing sources supported by observable inputs obtained by the Company from independent pricing services are classified as Level II. (2) Investments in separate accounts of $51.5 million at September 30, 2017 consist of approximately 1% of cash equivalents and 99% of equity securities. Investments in separate accounts of $7.5 million at December 31, 2016 consist of approximately 28% of cash equivalents and 72% of equity securities. The Company has valued these using the published price of the underlying securities as of the measurement date. Accordingly, the Company has classified these investments as Level I. (3) Investments related to long term compensation plans of $90.4 million and $78.1 million at September 30, 2017 and December 31, 2016 , respectively, are investments in publicly registered daily redeemable funds (some managed by Affiliates), which the Company has classified as trading securities and valued using the published price as of the measurement dates. Accordingly, the Company has classified these investments as Level I. (4) The uncategorized amounts of $47.1 million and $ 40.5 million at September 30, 2017 and December 31, 2016 , respectively, relate to investments in unconsolidated Funds which consist primarily of investments in Funds advised by Affiliates and are valued using NAV which the Company relies on to determine their fair value as a practical expedient and has therefore not classified these investments in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to amounts presented in the Condensed Consolidated Balance Sheets. These unconsolidated Funds consist primarily of real estate investment Funds and UCITS. The NAVs that have been provided by investees have been derived from the fair values of the underlying investments as of the measurement dates. These investments are subject to longer than monthly or quarterly redemption restrictions, and due to their nature, distributions are received only as cash flows are generated from underlying assets over the life of the Funds. The range of time over which the underlying assets are expected to be liquidated by the investees is approximately one to eight years from September 30, 2017 . The valuation process for the underlying real estate investments held by the real estate investment Funds begins with each property or loan being valued by the investment teams. The valuations are then reviewed and approved by the valuation committee, which consists of senior members of the portfolio management, acquisitions, and research teams. For certain properties and loans, the valuation process may also include a valuation by independent appraisers. In connection with this process, changes in fair-value measurements from period to period are evaluated for reasonableness, considering items such as market rents, capitalization and discount rates, and general economic and market conditions. Not included in the above are $13.9 million and $52.0 million at September 30, 2017 and December 31, 2016 , respectively, of various investments carried at cost, including investments in timber and timberlands. There were no significant transfers of financial assets or liabilities among Levels I, II or III during the nine months ended September 30, 2017 or 2016 .

Variable Interest Entities

Variable Interest Entities	9 Months Ended
	Sep. 30, 2017
Variable Interest Entities
Variable Interest Entities	The Company, through its Affiliates, sponsors the formation of various entities considered to be VIEs. These VIEs are primarily Funds managed by Affiliates and are investment vehicles typically owned entirely by third-party investors. Certain Funds may be capitalized with seed capital investments from the Company and may be owned partially by Affiliate key employees and/or individuals that own minority interests in an Affiliate. The Company’s determination of whether it is the primary beneficiary of a Fund that is a VIE is based in part on an assessment of whether or not the Company and its related parties are exposed to the majority of the risks and rewards of the entity. Typically the Fund’s investors are entitled to substantially all of the economics of these VIEs with the exception of the management fees and performance fees, if any, earned by the Company or any investment the Company has made into the Funds. The Company generally is not the primary beneficiary of Fund VIEs created to manage assets for clients unless the Company’s ownership interest, including interests of related parties, is substantial. The following table presents the assets and liabilities of Funds that are VIEs and consolidated by the Company (in millions): 9/30/2017 12/31/2016 Assets Investments at fair value $ 28.4 $ 14.9 Other assets of consolidated Funds 10.4 0.6 Total Assets $ 38.8 $ 15.5 Liabilities Other liabilities of consolidated Funds $ 1.5 $ 0.7 Total Liabilities $ 1.5 $ 0.7 "Investments at fair value" consist of investments in securities. The Company has also consolidated Funds that are not VIEs, and therefore the assets and liabilities of those Funds are not included in the table above. The assets of consolidated VIEs presented in the table above belong to the investors in those Funds, are available for use only by the Fund to which they belong, and are not available for use by the Company to the extent they are held by non-controlling interests. Any debt or liabilities held by consolidated Funds have no recourse to the Company's general credit. The Company’s involvement with Funds that are VIEs and not consolidated by the Company is generally limited to that of an investment manager and its investment in the unconsolidated VIE, if any. The Company’s investment in any unconsolidated VIE generally represents an insignificant interest of the Fund’s net assets and assets under management, such that the majority of the VIE’s results are attributable to third parties. The Company’s exposure to risk in these entities is generally limited to any capital contribution it has made or is required to make and any earned but uncollected management fees. The Company has not issued any investment performance guarantees to these VIEs or their investors. The following information pertains to unconsolidated VIEs for which the Company holds a variable interest (in millions): September 30, December 31, Unconsolidated VIE assets $ 6,024.1 $ 6,006.3 Unconsolidated VIE liabilities $ 3,895.3 $ 3,740.2 Equity interests on the Condensed Consolidated Balance Sheet $ 51.5 $ 54.2 Maximum risk of loss (1) $ 55.7 $ 58.5 (1) Includes equity investments the Company has made or is required to make and any earned but uncollected management/incentive fees. The Company does not record performance/incentive allocations until the respective measurement period has ended. In addition to the multiple unconsolidated VIE Funds, the Company determined that Heitman LLC, one of the Company’s Affiliates, is a VIE. The Company concluded that it is not the primary beneficiary of Heitman LLC because it does not hold the power to direct its most economically significant activities. The Company aggregated Heitman LLC with the Company’s other unconsolidated VIE Funds due to their similar risk profiles given that the risks and rewards are driven by changes in investment values and the Affiliates’ ability to manage those assets. On August 2, 2017, OMAM entered into a non-binding term sheet to sell its stake in Heitman LLC to Heitman’s management for cash consideration totaling $110 million . This transaction is expected to close around year-end.

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2017
Related Party Transactions [Abstract]
Related Party Transactions	OM plc has historically provided the Company with various oversight services, including governance, which includes compensation for board and executive committees, investor relations, procurement of insurance coverage, human resources, financial reporting, internal audit, treasury, systems, risk and tax services. Many of these services have been transitioned to the Company. That portion of the above costs which (i) are directly attributable to the Company, (ii) have been charged to the Company by OM plc and (iii) have been paid to OM plc by the Company, have been recorded in the Company’s unaudited Condensed Consolidated Financial Statements and was $0.1 million and $0.2 million in the three months ended September 30, 2017 and 2016 , respectively, and $0.5 million and $0.6 million in the nine months ended September 30, 2017 and 2016 , respectively. During 2016, the Company made a loan to an equity-method Affiliate that was used to make co-investments in Affiliate Funds. Amounts due to the Company in connection with this loan are included in other assets on the Company’s Consolidated Balance Sheets and were $3.4 million and $2.7 million at September 30, 2017 and at December 31, 2016 , respectively. During 2014, the Company entered into a Seed Capital Management Agreement, a Deferred Tax Asset Deed, a Co-investment Deed and a shareholder agreement with OM plc and/or OM plc’s subsidiaries. During 2016, the Company and OM plc agreed to amend the Seed Capital Management Agreement. As a result of the amendment, the Company purchased approximately $39.6 million of seed investments from OM plc in September 2016. The Company purchased the remaining seed capital investments covered by the Seed Capital Management Agreement valued at $63.4 million in July 2017, partially financed by borrowings under a non-recourse seed capital facility (see Note 8). The Company also purchased $4.5 million of co-investments fully financed by promissory notes payable. As of September 30, 2017 , the Company no longer managed seed capital provided by OM plc. Amounts owed to OM plc associated with the Co-investment Deed were $8.6 million at September 30, 2017 . As of September 30, 2017 , the Company had recorded $4.4 million for redemptions and estimated taxes due under the Co-investment Deed. Amounts withheld in excess of the future tax liability will be payable to OM plc upon settlement. During 2016, the Company and OM plc agreed to amend the Deferred Tax Asset Deed. Under the terms of the Deferred Tax Asset Deed, as amended, the Company agreed to make a payment of the net present value of the future tax benefits due to OM plc valued as of December 31, 2016 . This payment of $142.6 million will be made over three installments, with the first installment of $45.5 million paid on June 30, 2017 and the remaining two installments to be paid on December 31, 2017 and June 30, 2018. The Company retains an indemnity from OM plc that protects the realized and future tax benefits covered by the Deferred Tax Asset Deed (including the $142.6 million total payment referenced above) in the event of a tax law change or challenge from the IRS. As the Company is a member of a group of related businesses, it is possible that the terms of certain related party transactions are not the same as those that would result from transactions with wholly unrelated parties.

Borrowings and Debt

Borrowings and Debt	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Borrowings and Debt	The Company’s long-term debt at September 30, 2017 was comprised of a revolving credit facility, non-recourse seed capital financing and long-term bonds. Revolving Credit Facility On October 15, 2014, the Company entered into a revolving credit facility with Citibank, as administrative agent and issuing bank, and Citigroup Global Markets Inc. and Merrill Lynch, Pierce, Fenner & Smith Incorporated as joint lead arrangers and joint book runners (as amended, the “Credit Facility”). Pursuant to the terms of the Credit Facility, the Company may obtain loans on a revolving credit basis and procure the issuance of letters of credit in an aggregate amount at any time outstanding not in excess of $350 million . The Credit Facility has a maturity date of October 15, 2019. Borrowings under the credit facility bear interest, at OMAM’s option, at either the per annum rate equal to (a) the greatest of (i) the prime rate , (ii) the federal funds effective rate plus 0.5% and (iii) the one month Adjusted LIBO Rate plus 1.0% , plus, in each case an additional amount ranging from 0.25% to 1.00% , with such additional amount based from time to time on the ratio of the Company’s total consolidated indebtedness to Adjusted EBITDA (a “Leverage Ratio”) until either Moody’s Investor Service, Inc. or Standard & Poor’s assigned an initial rating to the Company’s senior, unsecured long-term indebtedness for borrowed money that was not subject to credit enhancement, or its credit rating, at which time such additional amount became based on its credit rating or (b) the London interbank offered rate for a period, at the Company’s election, equal to one, two, three or six months plus an additional amount ranging from 1.25% to 2.00% , with such additional amount based from time to time on the Company’s Leverage Ratio until it was assigned a credit rating, at which time such additional amount became based on its credit rating. In addition, the Company is charged a commitment fee based on the average daily unused portion of the revolving credit facility at a per annum rate ranging from 0.20% to 0.50% , with such amount based from time to time on its Leverage Ratio until it was assigned a credit rating, at which time such amount became based on the Company’s credit rating. In July 2016, Moody’s Investor Service, Inc. and Standard & Poor’s each assigned an initial investment-grade rating to the Company’s senior, unsecured long-term indebtedness. As a result of the assignment of the credit ratings, the Company’s interest rate on outstanding borrowings was set at LIBOR + 1.50% and the commitment fee on the unused portion of the revolving credit facility was set at 0.25% . Prior to the assignment of the credit ratings, the Company’s interest rate on outstanding borrowings was based on the Company’s Leverage Ratio and was set at LIBOR + 1.25% and the commitment fee on the unused portion of the revolving credit facility was set at 0.20% . Under the Credit Facility, the ratio of third-party borrowings to trailing twelve months Adjusted EBITDA cannot exceed 3.0 x, and the interest coverage ratio must not be less than 4.0 x. At September 30, 2017 the outstanding balance of the facility was $0.0 million ( $350.0 million of undrawn revolving credit facility capacity). Including $392.6 million of long-term bonds and per the terms of the revolving credit facility, which excludes non-recourse debt (see below), the Company’s ratio of third-party borrowings to trailing twelve months Adjusted EBITDA was 1.5 x and interest coverage ratio was 10.8x . The fair value of borrowings on the revolving credit facility approximated the net cost basis as of September 30, 2017 . At December 31, 2016 the outstanding balance of the facility was $0.0 million ( $350.0 million of undrawn revolving credit facility capacity). Including $392.3 million of long-term bonds (see below), the Company’s ratio of third-party borrowings to trailing twelve months Adjusted EBITDA was 1.9 x and interest coverage ratio was 18.5x . Non-recourse seed capital facility In July 2017, the Company purchased all remaining seed capital investments covered by the Seed Capital Management Agreement from OM plc for $63.4 million . OMAM financed this purchase in part through borrowings under a non-recourse seed capital facility collateralized entirely by its seed capital holdings. The Company entered into this facility as of July 17, 2017, and may borrow up to $65.0 million , so long as the borrowing does not represent more than 50% of the value of the permitted seed capital collateral. The non-recourse seed facility bears interest at LIBOR + 1.55% with a commitment fee on the unused portion of this facility of 0.95% . The facility currently has a maturity date of July 17, 2018 and includes a six-month evergreen renewal option. At September 30, 2017 , amounts outstanding under this non-recourse seed capital facility amounted to $33.5 million . Per the terms of the Company’s revolving credit facility, drawdowns under this facility are excluded from the Company’s third party debt levels for purposes of calculating the Company’s credit ratio covenants. The fair value of borrowings on the non-recourse seed capital facility approximated the net cost basis as of September 30, 2017 . Long-term bonds The Company’s long-term bonds were comprised of the following as of the dates indicated (in millions): September 30, 2017 December 31, 2016 Long-term bonds: Maturity amount Discount and issuance costs Carrying value Fair Value Carrying value Fair Value 4.80% Senior Notes Due 2026 $ 275.0 $ (3.2 ) $ 271.8 $ 284.2 $ 271.6 $ 271.0 5.125% Senior Notes Due 2031 125.0 (4.2 ) 120.8 124.9 120.7 107.9 Total long-term bonds $ 400.0 $ (7.4 ) $ 392.6 $ 409.1 $ 392.3 $ 378.9 In July 2016, the Company issued $275.0 million of 4.80% Senior Notes due 2026 (the “2026 Notes”) and $125.0 million of 5.125% Senior Notes due 2031 (the “2031 Notes”). The Company used the net proceeds of these offerings to finance the acquisition of Landmark in August 2016, settle an outstanding interest rate lock, purchase seed capital from OM plc and pay down the balance of the Revolving Credit Facility. 4.80% Senior Notes Due July 2026 The $275.0 million 2026 Notes were sold at a discount of $(0.5) million and the Company incurred debt issuance costs of $(3.0) million , which are being amortized to interest expense over the ten -year term. The 2026 Notes can be redeemed at any time prior to the scheduled maturity in part or in aggregate, at the greater of 100% of the principal amount at that time or the sum of the remaining scheduled payments discounted at the treasury rate (as defined) plus 0.5% , together with any related accrued and unpaid interest. 5.125% Senior Notes Due August 2031 The $125.0 million 2031 Notes incurred debt issuance costs of $(4.3) million , which are being amortized to interest expense over the fifteen -year term. The 2031 Notes can be redeemed at any time, on or after August 1, 2019 at a redemption price equal to 100% of the principal amount together with any related accrued and unpaid interest. The fair value of the long-term bonds was determined using broker quotes and any recent trading activity for each of the notes listed above, which are considered Level II inputs. Interest expense Interest expense incurred amounted to a total of $6.4 million and $4.4 million for the three months ended September 30, 2017 and 2016 , respectively. Interest expense incurred amounted to a total of $18.2 million and $5.4 million for the nine months ended September 30, 2017 and 2016 , respectively. Interest expense consists of interest accrued on the long-term debt, commitment fees and amortization of debt-related costs.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Operational commitments The Company had unfunded commitments to invest up to approximately $58 million in co-investments with its Affiliates as of September 30, 2017 . These commitments will be funded as required through the end of the respective investment periods ranging through 2022 . Certain Affiliates operate under regulatory authorities that require that they maintain minimum financial or capital requirements. Management is not aware of any violations of such financial requirements occurring during the period. Litigation The Company and its Affiliates are subject to claims, legal proceedings and other contingencies in the ordinary course of their business activities. Each of these matters is subject to various uncertainties, and it is possible that some of these matters may be resolved in a manner unfavorable to the Company or its Affiliates. The Company and its Affiliates establish accruals for matters for which the outcome is probable and can be reasonably estimated. If an insurance claim or other indemnification for a litigation accrual is available to the Company, the associated gain will not be recognized until all contingencies related to the gain have been resolved. As of September 30, 2017 , there were no material accruals for claims, legal proceedings or other contingencies. Indemnifications In the normal course of business, such as through agreements to enter into business combinations and divestitures of Affiliates, the Company enters into contracts that contain a variety of representations and warranties and which provide general indemnifications. The Company’s maximum exposure under these arrangements is unknown, as this would involve future claims that may be made against the Company that have not yet occurred. Foreign tax contingency The Company has clients in non-U.S. jurisdictions which require entities that are conducting certain business activities in such jurisdictions to collect and remit tax assessed on certain fees paid for goods and services provided. The Company does not believe this requirement is applicable based on its limited business activities in these jurisdictions. However, given the fact that uncertainty exists around the requirement, the Company has chosen to evaluate its potential exposure related to non-collection and remittance of these taxes. At September 30, 2017 , management of the Company has estimated the potential maximum exposure and concluded that it is not material. No accrual for the potential exposure has been recorded as the probability of incurring any potential liability relating to this exposure is not probable at September 30, 2017 . On July 13, 2017, (the “Effective Date”) the U.K. published revised draft legislation to be included in the U.K. Finance Bill (No. 2) 2017 (the “Finance Bill”) that would impact the Company’s tax position as of the Effective Date. This legislation is expected to receive Royal Assent in the fourth quarter of 2017. If enacted as originally proposed, the Company’s U.K. tax liability will increase as of the Effective Date. Consequently, if enactment occurs in the fourth quarter, the Company’s tax expense for the four quarter will reflect the impact of this increase as of the Effective Date. Considerations of credit risk Financial instruments that potentially subject the Company to significant concentrations of credit risk consist principally of cash investments. The Company maintains cash and cash equivalents and short term investments with various financial institutions. These financial institutions are typically located in cities in which the Company and its Affiliates operate. For the Company and certain Affiliates, cash deposits at a financial institution may exceed Federal Deposit Insurance Corporation insurance limits.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Earnings Per Share	Basic earnings per share is calculated by dividing net income attributable to controlling interests by the weighted-average number of shares outstanding. Diluted earnings per share is similar to basic earnings per share, but is adjusted for the effect of potentially issuable ordinary shares, except when inclusion is antidilutive. The calculation of basic and diluted earnings per ordinary share is as follows (dollars in millions, except per share data): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Numerator: Net income attributable to controlling interests $ 18.7 $ 34.0 $ 53.0 $ 101.1 Less: Total income available to participating unvested securities (1) (0.1 ) (0.2 ) (0.3 ) (0.7 ) Total net income attributable to ordinary shares $ 18.6 $ 33.8 $ 52.7 $ 100.4 Denominator: Weighted-average ordinary shares outstanding—basic 109,037,556 119,288,903 111,270,049 119,569,288 Potential ordinary shares: Restricted stock units 629,441 363,401 669,849 190,497 Weighted-average ordinary shares outstanding—diluted 109,666,997 119,652,304 111,939,898 119,759,785 Earnings per ordinary share attributable to controlling interests: Basic $ 0.17 $ 0.28 $ 0.47 $ 0.84 Diluted $ 0.17 $ 0.28 $ 0.47 $ 0.84 (1) Income available to participating unvested securities includes dividends paid on unvested restricted shares and their proportionate share of undistributed earnings.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Accumulated Other Comprehensive Income	The following tables show the tax effects allocated to each component of other comprehensive income (in millions): For the nine months ended September 30, 2017 Pre-Tax Tax (Expense) Net of Tax Foreign currency translation adjustment $ 2.6 $ — $ 2.6 Amortization related to derivative securities 2.0 (0.7 ) 1.3 Other comprehensive income (loss) $ 4.6 $ (0.7 ) $ 3.9 For the nine months ended September 30, 2016 Pre-Tax Tax Benefit Net of Tax Foreign currency translation adjustment $ (1.4 ) $ — $ (1.4 ) Change in net realized and unrealized gain (loss) on derivative securities (25.2 ) 4.4 (20.8 ) Other comprehensive income (loss) $ (26.6 ) $ 4.4 $ (22.2 ) The components of accumulated other comprehensive income (loss) for the nine months ended September 30, 2017 were as follows (in millions): Foreign currency translation adjustment Valuation of derivative securities Total Balance, as of December 31, 2016 $ 0.6 $ (26.9 ) $ (26.3 ) Other comprehensive income 2.6 1.3 3.9 Balance, as of September 30, 2017 $ 3.2 $ (25.6 ) $ (22.4 ) The Company reclassified $2.0 million and $0.5 million from accumulated other comprehensive income (loss) to interest expense on the Consolidated Statements of Income for the nine months ended September 30, 2017 and 2016 , respectively.

Derivatives and Hedging

Derivatives and Hedging	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging	Cash flow hedge In July 2015, the Company entered into a $300 million notional Treasury rate lock contract which was designated and qualified as a cash flow hedge. The Company documented its hedging strategy and risk management objective for this contract in anticipation of a future debt issuance. The Treasury rate lock contract eliminated the impact of fluctuations in the underlying benchmark interest rate for future forecasted debt issuances. The Company assessed the effectiveness of the hedging contract at inception and on a quarterly basis thereafter. In November 2015, at the Treasury rate lock termination date, the Company de-designated the Treasury rate lock and entered into an extension for the same $300 million notional through early July 2016. In July 2016, the Company entered into a second extension to the Treasury rate lock in conjunction with the issuances of the previously forecasted debt. The forecasted debt issuances occurred in July 2016 and the Treasury rate lock, which had an accumulated fair value of $(34.4) million , was settled. Refer to Note 8, Borrowings and Debt, for additional information on the debt issuances. Consistent with the original Treasury rate lock, the extended Treasury rate locks were designated and qualified as cash flow hedges. The Company documented its hedging strategy and risk management objective for these contracts in anticipation of the July 2016 debt issuance. The extended Treasury rate locks effectively eliminated the impact of fluctuations in the underlying benchmark interest rate for the debt issuances. The Company assessed the effectiveness of the hedging contracts at each of the extended Treasury rate locks’ inception dates and on a quarterly basis thereafter, where applicable. At the rate lock settlement, the hedging contracts were evaluated to be highly effective in offsetting changes in cash flows associated with the hedged items. The Company did not record any hedge ineffectiveness in 2016. As of September 30, 2017 , the balance recorded in accumulated other comprehensive income (loss) was $(25.6) million , net of tax. This balance will be reclassified to earnings through interest expense over the life of the issued debt. Amounts of $2.0 million and $0.5 million have been reclassified for the nine months ended September 30, 2017 and 2016 , respectively. During the next twelve months the Company expects to reclassify approximately $2.7 million to interest expense.

Discontinued Operations and Res

Discontinued Operations and Restructuring	9 Months Ended
	Sep. 30, 2017
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations and Restructuring	All of the Company’s discontinued operations were wound down or transferred to OM plc prior to 2016. The Company recognized a gain (loss) on disposal, net of taxes, of $0.0 million and $(0.4) million , with basic and diluted discontinued operations earnings per share of $0.00 and $0.00 for the three months ended September 30, 2017 and 2016 , respectively. The Company recognized a gain (loss) on disposal, net of taxes, of $(0.1) million and $1.2 million , with basic and diluted discontinued operations earnings per share of $0.00 and $0.01 for the nine months ended September 30, 2017 and 2016 , respectively. Gains and losses on disposal of discontinued operations represent the Company’s rights or obligations related to contractual residual interests in previously discontinued operations.

Basis of Presentation and Sig21

Basis of Presentation and Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
Basis of presentation	Basis of presentation These unaudited Condensed Consolidated Financial Statements reflect the historical balance sheets, statements of operations and of comprehensive income, statements of changes in shareholders’ equity and statements of cash flows of the Company. Within these Condensed Consolidated Financial Statements, entities that are part of OM plc’s consolidated results, but are not part of OMAM, as defined above, are referred to as “related parties.” The Condensed Consolidated Financial Statements are prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”). All dollar amounts, except per-share data in the text and tables herein, are stated in millions unless otherwise indicated. Transactions between the Company and OM plc are included in the Condensed Consolidated Financial Statements, however material intercompany balances and transactions among the Company and its consolidated Affiliates are eliminated in consolidation. These unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and notes thereto for the year ended December 31, 2016 included in the Company’s Annual Report on Form 10-K as filed with the Securities and Exchange Commission (“SEC”) on February 22, 2017 . The Company’s significant accounting policies, which have been consistently applied, are summarized in those Financial Statements.
Consolidation	Consolidation Affiliates The Company evaluates each of its Affiliates and other operating entities to determine the appropriate method of accounting. Generally, majority-owned entities or otherwise controlled investments in which the Company holds a controlling financial interest as the principal shareholder, managing member, or general partner are consolidated. Funds In evaluating whether or not a legal entity must be consolidated, the Company determines if such entity is a variable interest entity (“VIE”) or a voting interest entity (“VOE”). A VOE is considered an entity in which (i) the total equity investment at risk is sufficient to enable the entity to finance its activities independently and (ii) the equity holders at risk have the obligation to absorb losses, the right to receive residual returns, and the right to direct the activities of the entity that most significantly impact the entity’s economic performance. A VIE is an entity that lacks one or more of the characteristics of a VOE. Assessing whether an entity is a VIE or VOE involves judgment and analysis. Factors considered in this assessment include the entity’s legal organization, the entity’s capital structure and equity ownership and any related party or de facto agent implications of the Company’s involvement with the entity. Investments that are determined to be VIEs are consolidated if the Company or a consolidated Affiliate is the primary beneficiary of the investment. VOEs are typically consolidated if the Company holds the majority voting interest or otherwise controls the entity. In the normal course of business, the Company’s Affiliates sponsor and manage certain investment vehicles (the “Funds”). The Company assesses consolidation requirements with respect to its Funds pursuant to Accounting Standards Codification (“ASC”) Topic 810, Consolidation, as amended by Accounting Standards Update 2015-02, Consolidation: Amendments to the Consolidation Analysis ("ASU 2015-02") relating to the consolidation of VIEs. In evaluating whether the Company is the primary beneficiary, the Company evaluates its economic interests in the entity held either directly by the Company or indirectly through related parties. For VIEs that are investment companies subject to ASU 2010-10, Consolidation: Amendments for Certain Investment Funds , the primary beneficiary of the VIE is generally the variable interest holder that absorbs a majority of the expected losses of the VIE, receives a majority of the expected residual returns of the VIE, or both. The Company generally is not the primary beneficiary of Fund VIEs created to manage assets for clients unless the Company’s ownership interest, including interests of related parties, is substantial. The primary beneficiary of a VIE is defined as the variable interest holder that has a controlling financial interest. A controlling financial interest is defined as (i) the power to direct the activities of the VIE that most significantly impacts its economic performance and (ii) the obligation to absorb losses of the entity or the right to receive benefits from the entity that could potentially be significant to the VIE. If no single party satisfies both criteria, but the Company and its related parties satisfy the criteria on a combined basis, then the primary beneficiary is the entity out of the related party group that is most closely associated to the VIE. The consolidation analysis can generally be performed qualitatively, however, if it is not readily apparent that the Company is not the primary beneficiary, a quantitative analysis may also be performed. The Company consolidates VOEs when it has control over significant operating, financial and investing decisions of the entity or holds the majority voting interest. For VOEs organized as limited partnerships or as an entity with governance structures similar to a limited partnership (e.g., limited liability company with a managing member), the Company consolidates an entity when it holds the controlling general partnership interest and the limited partners do not hold substantive participating rights or rights to remove and replace the general partner or rights that could provide the limited partners with the ability to impact the ongoing governance and operating activities of the entity. Upon the occurrence of certain events (such as contributions and redemptions, either by the Company, its Affiliates, or third parties, or amendments to the governing documents of the Company’s investees or sponsored Funds) management reviews and reconsiders its previous conclusion regarding the status of an entity as a VIE or a VOE. Additionally, management continually reconsiders whether the Company is deemed to be a VIE’s primary beneficiary who consolidates such entity.
Use of Estimates	Use of Estimates The preparation of these Condensed Consolidated Financial Statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the period. Actual results could differ significantly from those estimates.

Acquisitions (Tables)

Acquisitions (Tables)	9 Months Ended
	Sep. 30, 2017
Business Combinations [Abstract]
Acquisition date purchase price allocation	The following table presents a summary of the acquisition-date fair values of the assets acquired and liabilities assumed for OMAM’s acquisition of Landmark (in millions): Landmark Purchase price Cash $ 239.2 Seller's expenses 3.5 Total consideration 242.7 Identifiable assets and liabilities Cash 23.4 Receivables 8.5 Indefinite-life trade name 1.0 Amortizable intangible asset management contracts 85.0 Fixed assets 5.1 Other current assets (liabilities), net (26.7 ) Assets (liabilities), net (1.7 ) Total identifiable assets and liabilities 94.6 Goodwill $ 148.1
Acquisition proforma information	The unaudited pro forma financial information is for informational purposes only and is not necessarily indicative of the financial results that would have been achieved had the acquisition actually occurred at the beginning of the first period presented (in millions, except per-share amounts): Three Months Ended Nine Months Ended Revenues $ 181.3 $ 526.9 Net income attributable to OMAM 26.8 66.3 Net income per share attributable to OMAM shareholders: Basic $0.22 $0.55 Diluted $0.22 $0.55 * The unaudited pro forma financial information originally provided with the Form 10-Q for the period ended September 30, 2016 has been revised to include additional expense estimates that more accurately reflect the combined financial results of OMAM and Landmark.

Investment (Tables)

Investment (Tables)	9 Months Ended
	Sep. 30, 2017
Investments [Abstract]
Schedule Of Investment Components	Investments are comprised of the following as of the dates indicated (in millions): September 30, December 31, Investments of consolidated Funds held at fair value $ 56.8 $ 35.5 Other investments held at fair value 69.0 17.5 Investments related to long-term incentive compensation plans held at fair value 90.4 78.1 Equity-accounted investments in unconsolidated Funds 29.6 30.5 Total investments held at fair value 245.8 161.6 Equity-accounted investments in Affiliates 52.4 55.2 Other investments* 13.9 52.0 Total investments per Condensed Consolidated Balance Sheets $ 312.1 $ 268.8 * Other investments represent cost-basis investments made by one of our Affiliates, including investments in timber and timberlands. At December 31, 2016, $50.1 million of these investments were recorded at the lower of cost or fair value less costs to sell and subsequently sold in January 2017 for a net gain of approximately $1.7 million .
Investment Income Including Realized Gain Loss On Investments	Investment income is comprised of the following for the three and nine months ended September 30 (in millions): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Investment return of equity-accounted investments in unconsolidated Funds $ 0.3 $ 0.2 $ 1.5 $ 0.7 Realized and unrealized gains on other investments held at fair value 3.4 0.7 6.1 0.7 Investment return of held for sale investments — (0.2 ) 1.7 0.4 Total return on OMAM investments 3.7 0.7 9.3 1.8 Investment return of equity-accounted investments in Affiliates 5.7 4.9 11.2 11.8 Total investment income per Condensed Consolidated Statement of Operations $ 9.4 $ 5.6 $ 20.5 $ 13.6

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Summary of the assets and liabilities that are measured at fair value on a recurring basis	The following table summarizes the Company’s assets and liabilities that are measured at fair value on a recurring basis at September 30, 2017 (in millions): Quoted prices in active markets (Level I) Significant other observable inputs (Level II) Significant unobservable inputs (Level III) Uncategorized Total value, Assets of OMAM and consolidated Funds (1) Common and preferred stock $ 56.0 $ — $ — $ — $ 56.0 Short-term investment funds 0.3 — — — 0.3 Derivatives 0.3 0.2 — — 0.5 Consolidated Funds total 56.6 0.2 — — 56.8 Investments in separate accounts (2) 51.5 — — — 51.5 Investments related to long-term incentive compensation plans (3) 90.4 — — — 90.4 Investments in unconsolidated Funds (4) — — — 47.1 47.1 OMAM total 141.9 — — 47.1 189.0 Total fair value assets $ 198.5 $ — $ — $ 47.1 $ 245.8 Liabilities of consolidated Funds (1) Common stock $ (6.5 ) $ — $ — $ — $ (6.5 ) Derivatives (0.3 ) (0.2 ) — — (0.5 ) Consolidated Funds total (6.8 ) (0.2 ) — — (7.0 ) Total fair value liabilities $ (6.8 ) $ (0.2 ) $ — $ — $ (7.0 ) The following table summarizes the Company’s assets and liabilities that are measured at fair value on a recurring basis at December 31, 2016 (in millions): Quoted prices in active markets (Level I) Significant other observable inputs (Level II) Significant unobservable inputs (Level III) Uncategorized Total value December 31, 2016 Assets of OMAM and consolidated Funds (1) Common and preferred stock $ 35.1 $ — $ — $ — $ 35.1 Short-term investment funds 0.4 — — — 0.4 Consolidated Funds total 35.5 — — — 35.5 Investments in separate accounts (2) 7.5 — — — 7.5 Investments related to long-term incentive compensation plans (3) 78.1 — — — 78.1 Investments in unconsolidated Funds (4) — — — 40.5 40.5 OMAM total 85.6 — — 40.5 126.1 Total fair value assets $ 121.1 $ — $ — $ 40.5 $ 161.6 Liabilities of OMAM and consolidated Funds (1) Common stock $ (5.0 ) $ — $ — $ — $ (5.0 ) Consolidated Funds total (5.0 ) — — — (5.0 ) Derivative securities — (0.1 ) — — (0.1 ) OMAM total — (0.1 ) — — (0.1 ) Total fair value liabilities $ (5.0 ) $ (0.1 ) $ — $ — $ (5.1 ) (1) Assets and liabilities measured at fair value are comprised of financial investments managed by the Company's Affiliates. $ 56.8 million in assets and $7.0 million in liabilities at September 30, 2017 and $35.5 million in assets and $5.0 million in liabilities at December 31, 2016 are the result of the consolidation of Funds sponsored by the Company’s Affiliates. The fair value of other investments is estimated based on quoted market prices, dealer quotations or alternative pricing sources supported by observable inputs and therefore classified within Level II. The Company obtains prices from independent pricing services that may utilize broker quotes, but generally the independent pricing services will use various other pricing techniques which take into account appropriate factors such as yield, quality, coupon rate, maturity, type of issue, trading characteristics and other data. The Company has not made adjustments to the prices provided. If the pricing services are only able to (a) obtain a single broker quote or (b) utilize a pricing model, such securities are classified as Level III. If the pricing services are unable to provide prices, the Company attempts to obtain one or more broker quotes directly from a dealer or values such securities at the last bid price obtained. In either case, such securities are classified as Level III. The Company performs due diligence procedures over third party pricing vendors to understand their methodology and controls to support their use in the valuation process to ensure compliance with required accounting disclosures. Equity, short-term investment funds and derivatives which are traded on a national securities exchange are stated at the last reported sales price on the day of valuation. To the extent these securities are actively traded and valuation adjustments are not applied, they are classified as Level I. These securities that trade in markets that are not considered to be active but are valued based on quoted market prices, dealer quotations or alternative pricing sources supported by observable inputs obtained by the Company from independent pricing services are classified as Level II. (2) Investments in separate accounts of $51.5 million at September 30, 2017 consist of approximately 1% of cash equivalents and 99% of equity securities. Investments in separate accounts of $7.5 million at December 31, 2016 consist of approximately 28% of cash equivalents and 72% of equity securities. The Company has valued these using the published price of the underlying securities as of the measurement date. Accordingly, the Company has classified these investments as Level I. (3) Investments related to long term compensation plans of $90.4 million and $78.1 million at September 30, 2017 and December 31, 2016 , respectively, are investments in publicly registered daily redeemable funds (some managed by Affiliates), which the Company has classified as trading securities and valued using the published price as of the measurement dates. Accordingly, the Company has classified these investments as Level I. (4) The uncategorized amounts of $47.1 million and $ 40.5 million at September 30, 2017 and December 31, 2016 , respectively, relate to investments in unconsolidated Funds which consist primarily of investments in Funds advised by Affiliates and are valued using NAV which the Company relies on to determine their fair value as a practical expedient and has therefore not classified these investments in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to amounts presented in the Condensed Consolidated Balance Sheets. These unconsolidated Funds consist primarily of real estate investment Funds and UCITS. The NAVs that have been provided by investees have been derived from the fair values of the underlying investments as of the measurement dates. These investments are subject to longer than monthly or quarterly redemption restrictions, and due to their nature, distributions are received only as cash flows are generated from underlying assets over the life of the Funds. The range of time over which the underlying assets are expected to be liquidated by the investees is approximately one to eight years from September 30, 2017 . The valuation process for the underlying real estate investments held by the real estate investment Funds begins with each property or loan being valued by the investment teams. The valuations are then reviewed and approved by the valuation committee, which consists of senior members of the portfolio management, acquisitions, and research teams. For certain properties and loans, the valuation process may also include a valuation by independent appraisers. In connection with this process, changes in fair-value measurements from period to period are evaluated for reasonableness, considering items such as market rents, capitalization and discount rates, and general economic and market conditions. Not included in the above are $13.9 million and $52.0 million at September 30, 2017 and December 31, 2016 , respectively, of various investments carried at cost, including investments in timber and timberlands.

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	9 Months Ended
	Sep. 30, 2017
Variable Interest Entities
Schedule of assets and liabilities and information pertains to VIEs	The following table presents the assets and liabilities of Funds that are VIEs and consolidated by the Company (in millions): 9/30/2017 12/31/2016 Assets Investments at fair value $ 28.4 $ 14.9 Other assets of consolidated Funds 10.4 0.6 Total Assets $ 38.8 $ 15.5 Liabilities Other liabilities of consolidated Funds $ 1.5 $ 0.7 Total Liabilities $ 1.5 $ 0.7 The following information pertains to unconsolidated VIEs for which the Company holds a variable interest (in millions): September 30, December 31, Unconsolidated VIE assets $ 6,024.1 $ 6,006.3 Unconsolidated VIE liabilities $ 3,895.3 $ 3,740.2 Equity interests on the Condensed Consolidated Balance Sheet $ 51.5 $ 54.2 Maximum risk of loss (1) $ 55.7 $ 58.5 (1) Includes equity investments the Company has made or is required to make and any earned but uncollected management/incentive fees. The Company does not record performance/incentive allocations until the respective measurement period has ended.

Borrowings and Debt (Tables)

Borrowings and Debt (Tables)	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Schedule of long term debt	The Company’s long-term bonds were comprised of the following as of the dates indicated (in millions): September 30, 2017 December 31, 2016 Long-term bonds: Maturity amount Discount and issuance costs Carrying value Fair Value Carrying value Fair Value 4.80% Senior Notes Due 2026 $ 275.0 $ (3.2 ) $ 271.8 $ 284.2 $ 271.6 $ 271.0 5.125% Senior Notes Due 2031 125.0 (4.2 ) 120.8 124.9 120.7 107.9 Total long-term bonds $ 400.0 $ (7.4 ) $ 392.6 $ 409.1 $ 392.3 $ 378.9

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Schedule of calculation of pro forma basic and diluted earnings per share	The calculation of basic and diluted earnings per ordinary share is as follows (dollars in millions, except per share data): Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Numerator: Net income attributable to controlling interests $ 18.7 $ 34.0 $ 53.0 $ 101.1 Less: Total income available to participating unvested securities (1) (0.1 ) (0.2 ) (0.3 ) (0.7 ) Total net income attributable to ordinary shares $ 18.6 $ 33.8 $ 52.7 $ 100.4 Denominator: Weighted-average ordinary shares outstanding—basic 109,037,556 119,288,903 111,270,049 119,569,288 Potential ordinary shares: Restricted stock units 629,441 363,401 669,849 190,497 Weighted-average ordinary shares outstanding—diluted 109,666,997 119,652,304 111,939,898 119,759,785 Earnings per ordinary share attributable to controlling interests: Basic $ 0.17 $ 0.28 $ 0.47 $ 0.84 Diluted $ 0.17 $ 0.28 $ 0.47 $ 0.84 (1) Income available to participating unvested securities includes dividends paid on unvested restricted shares and their proportionate share of undistributed earnings.

Accumulated Other Comprehensi28

Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Schedule of components of accumulated other comprehensive income including proportions attributable to non-controlling interests	The following tables show the tax effects allocated to each component of other comprehensive income (in millions): For the nine months ended September 30, 2017 Pre-Tax Tax (Expense) Net of Tax Foreign currency translation adjustment $ 2.6 $ — $ 2.6 Amortization related to derivative securities 2.0 (0.7 ) 1.3 Other comprehensive income (loss) $ 4.6 $ (0.7 ) $ 3.9 For the nine months ended September 30, 2016 Pre-Tax Tax Benefit Net of Tax Foreign currency translation adjustment $ (1.4 ) $ — $ (1.4 ) Change in net realized and unrealized gain (loss) on derivative securities (25.2 ) 4.4 (20.8 ) Other comprehensive income (loss) $ (26.6 ) $ 4.4 $ (22.2 ) The components of accumulated other comprehensive income (loss) for the nine months ended September 30, 2017 were as follows (in millions): Foreign currency translation adjustment Valuation of derivative securities Total Balance, as of December 31, 2016 $ 0.6 $ (26.9 ) $ (26.3 ) Other comprehensive income 2.6 1.3 3.9 Balance, as of September 30, 2017 $ 3.2 $ (25.6 ) $ (22.4 )

Organization and Description 29

Organization and Description of the Business (Details) $ in Millions	May 24, 2017director	May 19, 2017shares	Mar. 25, 2017USD ($)shares	Dec. 16, 2016shares	Jun. 22, 2015shares	Oct. 15, 2014shares	Sep. 30, 2017segment
Business Acquisition [Line Items]
Number of reportable segments | segment							1
Stock issued during period (in shares)		17,300,000		13,000,000	13,300,000
Stock repurchased and retied during period (in shares)		5,000,000		6,000,000
Parent owned interest							20.10%
Parent Company
Business Acquisition [Line Items]
Percent of interest sold			24.95%
Proceeds from sale of equity interest | $			$ 446
Number of shares sold (in shares)			11,414,676
Interest percent remaining after sale	5.50%
Number of directors to be appointed | director	2
IPO
Business Acquisition [Line Items]
Stock issued during period (in shares)						22,000,000
Over-Allotment Option
Business Acquisition [Line Items]
Stock issued during period (in shares)		2,595,000		1,950,000	1,995,000	2,231,375

Acquisitions - Narrative (Detai

Acquisitions - Narrative (Details) - USD ($)	Aug. 18, 2016	Sep. 30, 2017	Sep. 30, 2016	Jul. 31, 2016
Business Acquisition [Line Items]
Maturity amount		$ 400,000,000
Senior notes | 4.80% Senior Notes Due 2026
Business Acquisition [Line Items]
Maturity amount		$ 275,000,000		$ 275,000,000
Interest rate		4.80%		4.80%
Senior notes | 5.125% Senior Notes Due 2031
Business Acquisition [Line Items]
Maturity amount		$ 125,000,000		$ 125,000,000
Interest rate		5.125%		5.125%
Landmark
Business Acquisition [Line Items]
Interest acquired	60.00%
Total consideration	$ 242,700,000
Potential additional payments (up to)	$ 225,000,000
Retained ownership percentage by Landmark	40.00%
Measurement period adjustments, increase in total consideration paid		$ 300,000
Measurement period adjustments, decrease in net assets		1,600,000
Measurement period adjustments, increase in goodwill		1,900,000
Costs incurred		0	$ 6,100,000
Landmark revenue reported in consolidated financial results		88,100,000
Net income (loss) reported in consolidated financial results		$ (45,300,000)
Landmark | Management contracts
Business Acquisition [Line Items]
Acquired infinite-lived intangible asset, useful life	13 years 4 months 24 days
Intangible assets and goodwill, expected tax deductible, period	15 years
Landmark | Senior notes | 4.80% Senior Notes Due 2026
Business Acquisition [Line Items]
Maturity amount	$ 275,000,000
Interest rate	4.80%
Landmark | Senior notes | 5.125% Senior Notes Due 2031
Business Acquisition [Line Items]
Maturity amount	$ 125,000,000
Interest rate	5.125%

Acquisitions - Acquisition Date

Acquisitions - Acquisition Date Purchase Price Allocation (Details) - Landmark $ in Millions	Aug. 18, 2016USD ($)
Purchase price
Cash	$ 239.2
Seller's expenses	3.5
Total consideration	242.7
Identifiable assets and liabilities
Cash	23.4
Receivables	8.5
Indefinite-life trade name	1
Amortizable intangible asset management contracts	85
Fixed assets	5.1
Other current assets (liabilities), net	(26.7)
Assets (liabilities), net	(1.7)
Total identifiable assets and liabilities	94.6
Goodwill	$ 148.1

Acquisitions - Acquisition Pro

Acquisitions - Acquisition Pro Forma Information (Details) - Landmark - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2016
Business Acquisition [Line Items]
Revenues	$ 181.3	$ 526.9
Net income attributable to OMAM	$ 26.8	$ 66.3
Net income per share attributable to OMAM shareholders:
Basic (in dollars per share)	$ 0.22	$ 0.55
Diluted (in dollars per share)	$ 0.22	$ 0.55

Investments - Schedule of Inves

Investments - Schedule of Investment Components (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Jan. 31, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Investment Components
Investments at fair value		$ 245.8		$ 245.8		$ 161.6
Equity-accounted investments in Affiliates		52.4		52.4		55.2
Other investments		13.9		13.9		52
Total investments per Condensed Consolidated Balance Sheets		312.1		312.1		268.8
Consolidated Funds
Investment Components
Investments at fair value		56.8		56.8		35.5
Consolidated Entity Excluding Consolidated Funds
Investment Components
Total investments per Condensed Consolidated Balance Sheets		255.3		255.3		233.3
Investment Income
Investment income		9.4	$ 5.6	20.5	$ 13.6
Investments related to long-term incentive compensation plans held at fair value | Consolidated Entity Excluding Consolidated Funds
Investment Components
Investments at fair value		90.4		90.4		78.1
Equity-accounted investments in unconsolidated Funds | Consolidated Entity Excluding Consolidated Funds
Investment Components
Investments at fair value		29.6		29.6		30.5
Investment Income
Investment income		0.3	0.2	1.5	0.7
Other investments held at fair value | Consolidated Entity Excluding Consolidated Funds
Investment Components
Investments at fair value		69		69		17.5
Investment Income
Investment income		3.4	0.7	6.1	0.7
Investment return of held for sale investments | Consolidated Entity Excluding Consolidated Funds
Investment Income
Investment income		0	(0.2)	1.7	0.4
Total return on OMAM investments | Consolidated Entity Excluding Consolidated Funds
Investment Income
Investment income		3.7	0.7	9.3	1.8
Investment return of equity-accounted investments in Affiliates | Consolidated Entity Excluding Consolidated Funds
Investment Income
Investment income		$ 5.7	$ 4.9	$ 11.2	$ 11.8
Timber and Timberlands | Affiliates
Investment Components
Other investments						$ 50.1
Gain on sale of investment	$ 1.7

Investments - Narrative (Detail

Investments - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	9 Months Ended
	Aug. 31, 2017	Sep. 30, 2017	Sep. 30, 2016	Jul. 31, 2017	Dec. 31, 2016
Investment [Line Items]
Equity-accounted investments in Affiliates		$ 52.4			$ 55.2
Parent Company
Investment [Line Items]
Payments to acquire seed investment			$ 39.6	$ 63.4
Heitman LLC
Investment [Line Items]
Expected proceeds from sale of interest in corporation	$ 110
Equity-accounted investments in Affiliates		$ 51
Percent of earnings attributable to equity method investment		11.00%	6.00%

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Assets of OMAM
Investments at fair value	$ 245.8	$ 161.6
Liabilities of OMAM
Other investments	13.9	52
Consolidated Funds
Assets of OMAM
Investments at fair value	56.8	35.5
Consolidated Entity Excluding Consolidated Funds
Assets of OMAM
Total fair value assets	189	126.1
Recurring
Assets of OMAM
Investments at fair value	245.8
Liabilities of OMAM
Total fair value liabilities	(7)	(5.1)
Recurring | Investment funds
Assets of OMAM
Alternative investments, fair value disclosure	$ 47.1	40.5
Recurring | Investment funds | Minimum
Liabilities of OMAM
Term over which the underlying assets are expected to be liquidated by the investees	1 year
Recurring | Investment funds | Maximum
Liabilities of OMAM
Term over which the underlying assets are expected to be liquidated by the investees	8 years
Recurring | Consolidated Funds
Assets of OMAM
Common and preferred stock	$ 56	35.1
Short-term investment funds	0.3	0.4
Derivatives	0.5
Total fair value assets	56.8	35.5
Liabilities of OMAM
Common stock	(6.5)	(5)
Derivatives	(0.5)
Total fair value liabilities	(7)	(5)
Recurring | Consolidated Entity Excluding Consolidated Funds
Assets of OMAM
Investments in separate accounts	51.5	7.5
Investments related to long-term incentive compensation plans	90.4	78.1
Investments at fair value		161.6
Total fair value assets	189	126.1
Liabilities of OMAM
Derivative securities		(0.1)
Total fair value liabilities		(0.1)
Recurring | Consolidated Entity Excluding Consolidated Funds | Investment funds
Assets of OMAM
Investments at fair value	47.1	40.5
Alternative investments, fair value disclosure	47.1	40.5
Recurring | Quoted prices in active markets (Level I)
Assets of OMAM
Total fair value assets	198.5	121.1
Liabilities of OMAM
Total fair value liabilities	(6.8)	(5)
Recurring | Quoted prices in active markets (Level I) | Consolidated Funds
Assets of OMAM
Common and preferred stock	56	35.1
Short-term investment funds	0.3	0.4
Derivatives	0.3
Total fair value assets	56.6	35.5
Liabilities of OMAM
Common stock	(6.5)	(5)
Derivatives	(0.3)
Total fair value liabilities	(6.8)	(5)
Recurring | Quoted prices in active markets (Level I) | Consolidated Entity Excluding Consolidated Funds
Assets of OMAM
Investments in separate accounts	51.5	7.5
Investments related to long-term incentive compensation plans	90.4	78.1
Total fair value assets	$ 141.9	85.6
Liabilities of OMAM
Derivative securities		0
Total fair value liabilities		$ 0
Investment in cash	1.00%	28.00%
Investment in equity securities	99.00%	72.00%
Recurring | Significant other observable inputs (Level II)
Assets of OMAM
Total fair value assets	$ 0	$ 0
Liabilities of OMAM
Total fair value liabilities	(0.2)	(0.1)
Recurring | Significant other observable inputs (Level II) | Consolidated Funds
Assets of OMAM
Common and preferred stock	0	0
Short-term investment funds	0	0
Derivatives	0.2
Total fair value assets	0.2	0
Liabilities of OMAM
Common stock	0	0
Derivatives	(0.2)
Total fair value liabilities	(0.2)	0
Recurring | Significant other observable inputs (Level II) | Consolidated Entity Excluding Consolidated Funds
Assets of OMAM
Investments in separate accounts	0	0
Investments related to long-term incentive compensation plans	0	0
Total fair value assets	0	0
Liabilities of OMAM
Derivative securities		(0.1)
Total fair value liabilities		(0.1)
Recurring | Significant unobservable inputs (Level III)
Assets of OMAM
Total fair value assets	0	0
Liabilities of OMAM
Total fair value liabilities	0	0
Recurring | Significant unobservable inputs (Level III) | Consolidated Funds
Assets of OMAM
Common and preferred stock	0	0
Short-term investment funds	0	0
Derivatives	0
Total fair value assets	0	0
Liabilities of OMAM
Common stock	0	0
Derivatives	0
Total fair value liabilities	0	0
Recurring | Significant unobservable inputs (Level III) | Consolidated Entity Excluding Consolidated Funds
Assets of OMAM
Investments in separate accounts	0	0
Investments related to long-term incentive compensation plans	0	0
Total fair value assets	$ 0	0
Liabilities of OMAM
Derivative securities		0
Total fair value liabilities		$ 0

Variable Interest Entities - As

Variable Interest Entities - Assets and Liabilities of Funds that are VIEs (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Assets
Investments at fair value	$ 245.8	$ 161.6
Variable Interest Entity, Primary Beneficiary
Assets
Investments at fair value	28.4	14.9
Other assets of consolidated Funds	10.4	0.6
Total Assets	38.8	15.5
Liabilities
Other liabilities of consolidated Funds	1.5	0.7
Total Liabilities	$ 1.5	$ 0.7

Variable Interest Entities - Un

Variable Interest Entities - Unconsolidated VIEs (Details) - USD ($) $ in Millions	1 Months Ended	5 Months Ended
	Aug. 31, 2017	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Heitman LLC
Variable Interest Entities
Expected proceeds from sale of interest in corporation	$ 110
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entities
Unconsolidated VIE assets			$ 6,024.1	$ 6,006.3
Unconsolidated VIE liabilities			3,895.3	3,740.2
Equity interests on the Condensed Consolidated Balance Sheet			51.5	54.2
Maximum risk of loss			$ 55.7	$ 58.5
Scenario, Forecast | Heitman LLC
Variable Interest Entities
Expected proceeds from sale of interest in corporation		$ 110

Related Party Transactions (Det

Related Party Transactions (Details) $ in Millions	Jun. 30, 2017USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2016USD ($)	Jun. 30, 2018installment	Sep. 30, 2017USD ($)installment	Sep. 30, 2016USD ($)	Jul. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Related party transactions
Number of installment payments | installment					3
Loan to Equity-Method Affiliate
Related party transactions
Related party loans		$ 3.4			$ 3.4			$ 2.7
Scenario, Forecast
Related party transactions
Number of installment payments | installment				2
Parent Company
Related party transactions
Costs allocated		0.1	$ 0.2		0.5	$ 0.6
Seed capital transferred			$ 39.6			$ 39.6	$ 63.4
Promissory note payable to finance seed capital investment purchase							$ 4.5
Amount owed to the Parent associated with the co-investment deed		8.6			8.6
Redemptions and estimated taxes due		$ 4.4			4.4
Amounts owed under deferred tax asset deed	$ 45.5				$ 142.6

Borrowings and Debt - Narrative

Borrowings and Debt - Narrative (Details)	Jul. 17, 2017USD ($)	Oct. 15, 2014USD ($)	Jul. 31, 2016USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2016USD ($)	Jun. 30, 2016	Sep. 30, 2017USD ($)	Sep. 30, 2016USD ($)	Dec. 31, 2016USD ($)	Jul. 31, 2017USD ($)
Debt Instrument [Line Items]
Carrying value				$ 392,600,000			$ 392,600,000		$ 392,300,000
Maturity amount				400,000,000			400,000,000
Interest expense				6,400,000	$ 4,400,000		$ 18,200,000	$ 5,400,000
Parent Company
Debt Instrument [Line Items]
Payments to acquire seed investment					$ 39,600,000			$ 39,600,000		$ 63,400,000
Revolving credit facility | Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 350,000,000
Ratio of third-party borrowings to trailing twelve months Adjusted EBITDA							1.51		1.88
Carrying value				0			$ 0		$ 0
Undrawn revolving credit facility capacity				350,000,000			$ 350,000,000		$ 350,000,000
Revolving credit facility | Credit Facility | Minimum
Debt Instrument [Line Items]
Undrawn amounts fee (as a percent)		0.20%
Interest coverage ratio			4				10.8		18.5
Revolving credit facility | Credit Facility | Maximum
Debt Instrument [Line Items]
Undrawn amounts fee (as a percent)		0.50%
Ratio of third-party borrowings to trailing twelve months Adjusted EBITDA			3
Revolving credit facility | Credit Facility | LIBOR
Debt Instrument [Line Items]
Variable rate margin (as a percent)		1.00%	1.50%			1.25%
Undrawn amounts fee (as a percent)			0.25%			0.20%
Revolving credit facility | Credit Facility | LIBOR | Minimum
Debt Instrument [Line Items]
Variable rate margin (as a percent)		1.25%
Variable rate additional margin (as a percent)		0.25%
Revolving credit facility | Credit Facility | LIBOR | Maximum
Debt Instrument [Line Items]
Variable rate margin (as a percent)		2.00%
Variable rate additional margin (as a percent)		1.00%
Revolving credit facility | Consolidated Entity Excluding Consolidated Funds | Federal Funds Effective Swap Rate
Debt Instrument [Line Items]
Variable rate margin (as a percent)		0.50%
Senior notes | 4.80% Senior Notes Due 2026
Debt Instrument [Line Items]
Carrying value				271,800,000			$ 271,800,000		$ 271,600,000
Maturity amount			$ 275,000,000	$ 275,000,000			$ 275,000,000
Interest rate			4.80%	4.80%			4.80%
Debt discount			$ (500,000)
Debt issuance costs			$ (3,000,000)
Debt term			10 years
Debt redemption, percentage of principal			100.00%
Debt redemption, percentage of interest			0.50%
Senior notes | 5.125% Senior Notes Due 2031
Debt Instrument [Line Items]
Carrying value				$ 120,800,000			$ 120,800,000		$ 120,700,000
Maturity amount			$ 125,000,000	$ 125,000,000			$ 125,000,000
Interest rate			5.125%	5.125%			5.125%
Debt issuance costs			$ (4,300,000)
Debt term			15 years
Debt redemption, percentage of principal			100.00%
Credit Facility | Non-recourse Seed Capital Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 65,000,000
Undrawn amounts fee (as a percent)	0.95%
Carrying value				$ 33,500,000			$ 33,500,000
Maximum borrowing capacity, percentage of Seed Capital	50.00%
Credit Facility | Non-recourse Seed Capital Facility | LIBOR
Debt Instrument [Line Items]
Variable rate margin (as a percent)	1.55%

Borrowings and Debt - Long Term

Borrowings and Debt - Long Term Debt Excluding Consolidated Funds (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016	Jul. 31, 2016
Debt Instrument [Line Items]
Maturity amount	$ 400,000,000
Discount and issuance costs	(7,400,000)
Carrying value	392,600,000	$ 392,300,000
Fair Value	409,100,000	378,900,000
Senior notes | 4.80% Senior Notes Due 2026
Debt Instrument [Line Items]
Maturity amount	275,000,000		$ 275,000,000
Discount and issuance costs	(3,200,000)
Carrying value	271,800,000	271,600,000
Fair Value	$ 284,200,000	271,000,000
Interest rate	4.80%		4.80%
Senior notes | 5.125% Senior Notes Due 2031
Debt Instrument [Line Items]
Maturity amount	$ 125,000,000		$ 125,000,000
Discount and issuance costs	(4,200,000)
Carrying value	120,800,000	120,700,000
Fair Value	$ 124,900,000	$ 107,900,000
Interest rate	5.125%		5.125%

Commitments and Contingencies (

Commitments and Contingencies (Details) $ in Millions	Sep. 30, 2017USD ($)
Maximum
Other Commitments [Line Items]
Commitments to fund investment activity	$ 58

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Numerator:
Net income attributable to controlling interests	$ 18.7	$ 34	$ 53	$ 101.1
Less: Total income available to participating unvested securities	(0.1)	(0.2)	(0.3)	(0.7)
Total net income attributable to ordinary shares	$ 18.6	$ 33.8	$ 52.7	$ 100.4
Denominator:
Weighted average ordinary shares outstanding (in shares)	109,037,556	119,288,903	111,270,049	119,569,288
Potential ordinary shares:
Restricted stock units (in shares)	629,441	363,401	669,849	190,497
Weighted-average diluted ordinary shares outstanding - diluted (in shares)	109,666,997	119,652,304	111,939,898	119,759,785
Earnings per ordinary share attributable to controlling interests:
Basic (in dollars per share)	$ 0.17	$ 0.28	$ 0.47	$ 0.84
Diluted (in dollars per share)	$ 0.17	$ 0.28	$ 0.47	$ 0.84

Accumulated Other Comprehensi43

Accumulated Other Comprehensive Income - Tax Effects Allocated to Each Component of Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss)	$ 1.5	$ (1.4)	$ 3.9	$ (22.2)
Foreign currency translation adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), pre-tax			2.6	(1.4)
Other comprehensive income (loss), tax benefit (expense)			0	0
Total other comprehensive income (loss)			2.6	(1.4)
Valuation of derivative securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), pre-tax			2	(25.2)
Other comprehensive income (loss), tax benefit (expense)			(0.7)	4.4
Total other comprehensive income (loss)			1.3	(20.8)
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), pre-tax			4.6	(26.6)
Other comprehensive income (loss), tax benefit (expense)			(0.7)	4.4
Total other comprehensive income (loss)			$ 3.9	$ (22.2)

Accumulated Other Comprehensi44

Accumulated Other Comprehensive Income - Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			$ 165	$ 165.9
Other comprehensive income	$ 1.5	$ (1.4)	3.9	(22.2)
Ending balance	132	$ 214.1	132	214.1
Foreign currency translation adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			0.6
Other comprehensive income			2.6	(1.4)
Ending balance	3.2		3.2
Valuation of derivative securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(26.9)
Other comprehensive income			1.3	(20.8)
Ending balance	(25.6)		(25.6)
Accumulated other comprehensive income (loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(26.3)
Other comprehensive income			3.9	$ (22.2)
Ending balance	$ (22.4)		$ (22.4)

Accumulated Other Comprehensi45

Accumulated Other Comprehensive Income - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Reclassification out of Accumulated Other Comprehensive Income | Accumulated other comprehensive income (loss)
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Interest expense	$ 2	$ 0.5

Derivatives and Hedging (Detail

Derivatives and Hedging (Details) - USD ($)	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Jul. 31, 2016	Dec. 31, 2015	Jul. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Other comprehensive income	$ 132,000,000	$ 214,100,000	$ 165,000,000		$ 165,900,000
Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Loss amount reclassified within twelve months	2,700,000
Valuation of derivative securities
Derivative Instruments, Gain (Loss) [Line Items]
Other comprehensive income	(25,600,000)		(26,900,000)
Accumulated Other Comprehensive Income (Loss)
Derivative Instruments, Gain (Loss) [Line Items]
Other comprehensive income	(22,400,000)		$ (26,300,000)
Accumulated Other Comprehensive Income (Loss) | Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	$ 2,000,000	$ 500,000
Treasury Lock | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount						$ 300,000,000
Fair value of derivative				$ (34,400,000)

Discontinued Operations and R47

Discontinued Operations and Restructuring (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Discontinued Operations and Disposal Groups [Abstract]
Gain (loss) on disposal, net of tax	$ 0	$ (0.4)	$ (0.1)	$ 1.2
Discontinued operations earnings per share (in dollars per share)	$ 0	$ 0	$ 0	$ 0.01