Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income	$ 165.7	$ 111.5
Less: Net (income) loss attributable to non-controlling interests in consolidated Funds	(9.6)	1.9
Adjustments to reconcile net income to net cash flows from operating activities from continuing operations:
(Gain) loss on disposal of discontinued operations, excluding consolidated Funds	0.0	(0.1)
Net earnings from Affiliate accounted for using the equity method	(11.2)	0.0
Changes in operating assets and liabilities (excluding discontinued operations):
Net cash flows from operating activities of continuing operations	(183.6)	142.7
Purchase of investments	(18.0)	(75.9)
Distributions received from equity method investees	3.8	0.0
Net cash flows from operating activities of discontinued operations	0.0	0.1
Total net cash flows from operating activities	(183.6)	142.8
Cash flows from investing activities:
Sale of investments	40.1	49.2
Contributions in equity method investees	(8.0)	0.0
Consolidation (de-consolidation) of Funds	0.0	(40.2)
Net cash flows from investing activities of continuing operations	(8.8)	18.6
Net cash flows from investing activities of discontinued operations	0.0	0.0
Total net cash flows from investing activities	(8.8)	18.6
Cash flows from financing activities:
Payment for debt issuance costs	(1.8)	0.0
Non-controlling interest capital redeemed	(3.1)	0.0
Net cash flows from financing activities of continuing operations	(28.4)	(40.3)
Net cash flows from financing activities of discontinued operations	0.0	0.0
Total net cash flows from financing activities	(28.4)	(40.3)
Effect of foreign exchange rate changes on cash and cash equivalents	0.0	0.0
Net increase (decrease) in cash and cash equivalents	(220.8)	121.1
Cash and cash equivalents at beginning of period	345.5	200.4
Cash and cash equivalents at end of period (including cash at consolidated Funds classified as restricted)	124.7	321.5
Supplemental disclosure of cash flow information:
Interest paid (excluding consolidated Funds)	24.8	19.9
Income taxes paid	41.6	28.0
Supplemental disclosure of non-cash investing and financing transactions:
De-consolidation of Funds	0.0	(99.6)
Investments in unconsolidated Funds
Adjustments to reconcile net income to net cash flows from operating activities from continuing operations:
(Gain) loss on disposal of discontinued operations, excluding consolidated Funds	0.0	(0.1)
Amortization of acquired intangibles	4.9	4.9
Depreciation and other amortization	12.2	10.6
Amortization of debt-related costs	2.6	2.4
Amortization and revaluation of non-cash compensation awards	6.3	165.9
Net earnings from Affiliate accounted for using the equity method	(2.1)	(2.1)
Distributions received from equity method Affiliate	2.3	11.7
Gain on sale of investment in Affiliate	0.0	(65.7)
Deferred income taxes	7.6	(28.2)
(Gains) losses on other investments	(26.3)	(2.0)
Changes in operating assets and liabilities (excluding discontinued operations):
(Increase) decrease in investment advisory fees receivable	12.2	22.2
(Increase) decrease in other receivables, prepayments, deposits and other assets	(8.8)	18.9
Increase (decrease) in accrued incentive compensation, amounts due to OM plc and other liabilities	(262.8)	(17.1)
Increase (decrease) in accounts payable, accrued expenses and accrued income taxes	(54.1)	(48.3)
Net cash flows from operating activities of continuing operations	(149.9)	186.5
Purchase of investments	(161.1)	(178.0)
Sale of investments	122.1	116.7
Cash flows from investing activities:
Additions of fixed assets	(26.7)	(14.5)
Proceeds from sale of investment in Affiliate	0.0	100.0
Cash flows from financing activities:
Proceeds from third party and non-recourse borrowings	485.0	15.0
Repayment of third party and non-recourse borrowings	(275.0)	(33.5)
Payment to OM plc for DTA Deed	(32.7)	0.0
Payment to OM plc for co-investment redemptions	(5.1)	(0.6)
Dividends paid to shareholders	(18.8)	(24.0)
Dividends paid to related parties	(8.6)	(7.9)
Payment to OM plc for promissory notes	0.0	(4.5)
Repurchases of common stock	(212.6)	(62.1)
Consolidated Funds
Cash flows from operating activities:
Less: Net (income) loss attributable to non-controlling interests in consolidated Funds	(9.6)	1.9
Adjustments to reconcile net income to net cash flows from operating activities from continuing operations:
(Gains) losses on other investments	6.1	3.7
Changes in operating assets and liabilities (excluding discontinued operations):
Net cash flows from operating activities of continuing operations	(33.7)	(43.8)
(Increase) decrease in receivables and other assets	4.8	(4.7)
Increase (decrease) in accounts payable and other liabilities	(4.0)	20.4
Cash flows from financing activities:
Non-controlling interest capital raised	8.0	77.7
Redeemable non-controlling interest capital raised	38.0	0.0
Redeemable non-controlling interest capital redeemed	(1.7)	(0.4)
Supplemental disclosure of non-cash investing and financing transactions:
Payable for securities purchased by a consolidated Fund	$ 7.4	$ 19.8